RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
Guest
Posts: n/a
Re: RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
nrs wrote:
> On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
>> I have posted this once today, but for some reason it did not post.
>> If anyone finds it, sorry for the duplicate post.
>>
>> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
>> the 4.11 ratio would be better for me. I currently have 31" BFG All
>> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
>> sort in the future when these wear out. I will never upgrade to
>> bigger than a 33" tire. As for off-roading, I do some light trail
>> riding and the occasional hop in the mud puddle when I find one that
>> looks fun. 80% of my driving is highway at approximately 70 miles
>> round trip at a speed of anywhere from 60-70 mph. The other 20% is
>> split between city driving (10%), and off-roading (10%). My main
>> goal
>> is to get my Jeep to drive as close as possible to the way it did
>> bone
>> stock (being able to use my 6th gear on the freeway) and to prevent
>> excessive wear and tear on my clutch and engine parts. Someone
>> please
>> help! : D
>>
>> '06 TJ (4.0L with I-6)
>> 6 speed manual
>> Dana 30 front/35 rear
>> current 3.07s
>>
>> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
>> (like
>> 44s)? I don't know if this makes any difference as far as which gear
>> ratio to go with, but where I live (upstate NY), there can be quite a
>> bit of snow from Dec. - Apr.
>
> If you want it too run like it does now the ideal gear ration would be
> 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> available. The 3.73 or 4.1 would give you better performance off road
> but your fuel economy would suffer on the road.
>
Unfortunately the flying bricks we drive don't react the same as cars
when it comes to low revs.
Once you get the axles 'into' the air stream by raising the body away
from them with a suspension lift, it reacts 'strongly' to wind resistance.
On a lifted Jeep, anything much below 2000 rpm at highway speed will
start the engine lugging so you need way too much gas pedal to keep up
with wind twitches or slight hills.
Everyone I know and that has posted on the newsgroups that has 'dropped'
the overdrive with large tires and tall gears gets better mileage at
highway speeds.
My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
after calibrating the odometer when I drove it the same as before using
all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
this day.
Now I do have a manually 'tuned' carb engine with a 'hot' spark and
timing curve that insists on 91+ octane with a super light fiberglass
body (it only takes two people to 'easily' pick up the whole body tub
'with' the seats and roll bar in it) so the thing is basically an engine
on wheels that goes like a scalded cat, but still.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
> On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
>> I have posted this once today, but for some reason it did not post.
>> If anyone finds it, sorry for the duplicate post.
>>
>> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
>> the 4.11 ratio would be better for me. I currently have 31" BFG All
>> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
>> sort in the future when these wear out. I will never upgrade to
>> bigger than a 33" tire. As for off-roading, I do some light trail
>> riding and the occasional hop in the mud puddle when I find one that
>> looks fun. 80% of my driving is highway at approximately 70 miles
>> round trip at a speed of anywhere from 60-70 mph. The other 20% is
>> split between city driving (10%), and off-roading (10%). My main
>> goal
>> is to get my Jeep to drive as close as possible to the way it did
>> bone
>> stock (being able to use my 6th gear on the freeway) and to prevent
>> excessive wear and tear on my clutch and engine parts. Someone
>> please
>> help! : D
>>
>> '06 TJ (4.0L with I-6)
>> 6 speed manual
>> Dana 30 front/35 rear
>> current 3.07s
>>
>> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
>> (like
>> 44s)? I don't know if this makes any difference as far as which gear
>> ratio to go with, but where I live (upstate NY), there can be quite a
>> bit of snow from Dec. - Apr.
>
> If you want it too run like it does now the ideal gear ration would be
> 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> available. The 3.73 or 4.1 would give you better performance off road
> but your fuel economy would suffer on the road.
>
Unfortunately the flying bricks we drive don't react the same as cars
when it comes to low revs.
Once you get the axles 'into' the air stream by raising the body away
from them with a suspension lift, it reacts 'strongly' to wind resistance.
On a lifted Jeep, anything much below 2000 rpm at highway speed will
start the engine lugging so you need way too much gas pedal to keep up
with wind twitches or slight hills.
Everyone I know and that has posted on the newsgroups that has 'dropped'
the overdrive with large tires and tall gears gets better mileage at
highway speeds.
My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
after calibrating the odometer when I drove it the same as before using
all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
this day.
Now I do have a manually 'tuned' carb engine with a 'hot' spark and
timing curve that insists on 91+ octane with a super light fiberglass
body (it only takes two people to 'easily' pick up the whole body tub
'with' the seats and roll bar in it) so the thing is basically an engine
on wheels that goes like a scalded cat, but still.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
Guest
Posts: n/a
Re: RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
> nrs wrote:
> > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> >> I have posted this once today, but for some reason it did not post.
> >> If anyone finds it, sorry for the duplicate post.
>
> >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> >> sort in the future when these wear out. I will never upgrade to
> >> bigger than a 33" tire. As for off-roading, I do some light trail
> >> riding and the occasional hop in the mud puddle when I find one that
> >> looks fun. 80% of my driving is highway at approximately 70 miles
> >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> >> split between city driving (10%), and off-roading (10%). My main
> >> goal
> >> is to get my Jeep to drive as close as possible to the way it did
> >> bone
> >> stock (being able to use my 6th gear on the freeway) and to prevent
> >> excessive wear and tear on my clutch and engine parts. Someone
> >> please
> >> help! : D
>
> >> '06 TJ (4.0L with I-6)
> >> 6 speed manual
> >> Dana 30 front/35 rear
> >> current 3.07s
>
> >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> >> (like
> >> 44s)? I don't know if this makes any difference as far as which gear
> >> ratio to go with, but where I live (upstate NY), there can be quite a
> >> bit of snow from Dec. - Apr.
>
> > If you want it too run like it does now the ideal gear ration would be
> > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > available. The 3.73 or 4.1 would give you better performance off road
> > but your fuel economy would suffer on the road.
>
> Unfortunately the flying bricks we drive don't react the same as cars
> when it comes to low revs.
>
> Once you get the axles 'into' the air stream by raising the body away
> from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> On a lifted Jeep, anything much below 2000 rpm at highway speed will
> start the engine lugging so you need way too much gas pedal to keep up
> with wind twitches or slight hills.
>
> Everyone I know and that has posted on the newsgroups that has 'dropped'
> the overdrive with large tires and tall gears gets better mileage at
> highway speeds.
>
> My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> after calibrating the odometer when I drove it the same as before using
> all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> this day.
>
> Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> timing curve that insists on 91+ octane with a super light fiberglass
> body (it only takes two people to 'easily' pick up the whole body tub
> 'with' the seats and roll bar in it) so the thing is basically an engine
> on wheels that goes like a scalded cat, but still.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
Mike,
I´m going to start paying attention to my RPMs when I'm on the
highway. Right now I'm running 30 inch tires with 4.56 gears (up from
the original 4.10) and like it a lot. I plan to put 32 inch tires on
it next year. It will be interesting to see how it runs then.
> nrs wrote:
> > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> >> I have posted this once today, but for some reason it did not post.
> >> If anyone finds it, sorry for the duplicate post.
>
> >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> >> sort in the future when these wear out. I will never upgrade to
> >> bigger than a 33" tire. As for off-roading, I do some light trail
> >> riding and the occasional hop in the mud puddle when I find one that
> >> looks fun. 80% of my driving is highway at approximately 70 miles
> >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> >> split between city driving (10%), and off-roading (10%). My main
> >> goal
> >> is to get my Jeep to drive as close as possible to the way it did
> >> bone
> >> stock (being able to use my 6th gear on the freeway) and to prevent
> >> excessive wear and tear on my clutch and engine parts. Someone
> >> please
> >> help! : D
>
> >> '06 TJ (4.0L with I-6)
> >> 6 speed manual
> >> Dana 30 front/35 rear
> >> current 3.07s
>
> >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> >> (like
> >> 44s)? I don't know if this makes any difference as far as which gear
> >> ratio to go with, but where I live (upstate NY), there can be quite a
> >> bit of snow from Dec. - Apr.
>
> > If you want it too run like it does now the ideal gear ration would be
> > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > available. The 3.73 or 4.1 would give you better performance off road
> > but your fuel economy would suffer on the road.
>
> Unfortunately the flying bricks we drive don't react the same as cars
> when it comes to low revs.
>
> Once you get the axles 'into' the air stream by raising the body away
> from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> On a lifted Jeep, anything much below 2000 rpm at highway speed will
> start the engine lugging so you need way too much gas pedal to keep up
> with wind twitches or slight hills.
>
> Everyone I know and that has posted on the newsgroups that has 'dropped'
> the overdrive with large tires and tall gears gets better mileage at
> highway speeds.
>
> My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> after calibrating the odometer when I drove it the same as before using
> all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> this day.
>
> Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> timing curve that insists on 91+ octane with a super light fiberglass
> body (it only takes two people to 'easily' pick up the whole body tub
> 'with' the seats and roll bar in it) so the thing is basically an engine
> on wheels that goes like a scalded cat, but still.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
Mike,
I´m going to start paying attention to my RPMs when I'm on the
highway. Right now I'm running 30 inch tires with 4.56 gears (up from
the original 4.10) and like it a lot. I plan to put 32 inch tires on
it next year. It will be interesting to see how it runs then.
Guest
Posts: n/a
Re: RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
> nrs wrote:
> > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> >> I have posted this once today, but for some reason it did not post.
> >> If anyone finds it, sorry for the duplicate post.
>
> >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> >> sort in the future when these wear out. I will never upgrade to
> >> bigger than a 33" tire. As for off-roading, I do some light trail
> >> riding and the occasional hop in the mud puddle when I find one that
> >> looks fun. 80% of my driving is highway at approximately 70 miles
> >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> >> split between city driving (10%), and off-roading (10%). My main
> >> goal
> >> is to get my Jeep to drive as close as possible to the way it did
> >> bone
> >> stock (being able to use my 6th gear on the freeway) and to prevent
> >> excessive wear and tear on my clutch and engine parts. Someone
> >> please
> >> help! : D
>
> >> '06 TJ (4.0L with I-6)
> >> 6 speed manual
> >> Dana 30 front/35 rear
> >> current 3.07s
>
> >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> >> (like
> >> 44s)? I don't know if this makes any difference as far as which gear
> >> ratio to go with, but where I live (upstate NY), there can be quite a
> >> bit of snow from Dec. - Apr.
>
> > If you want it too run like it does now the ideal gear ration would be
> > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > available. The 3.73 or 4.1 would give you better performance off road
> > but your fuel economy would suffer on the road.
>
> Unfortunately the flying bricks we drive don't react the same as cars
> when it comes to low revs.
>
> Once you get the axles 'into' the air stream by raising the body away
> from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> On a lifted Jeep, anything much below 2000 rpm at highway speed will
> start the engine lugging so you need way too much gas pedal to keep up
> with wind twitches or slight hills.
>
> Everyone I know and that has posted on the newsgroups that has 'dropped'
> the overdrive with large tires and tall gears gets better mileage at
> highway speeds.
>
> My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> after calibrating the odometer when I drove it the same as before using
> all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> this day.
>
> Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> timing curve that insists on 91+ octane with a super light fiberglass
> body (it only takes two people to 'easily' pick up the whole body tub
> 'with' the seats and roll bar in it) so the thing is basically an engine
> on wheels that goes like a scalded cat, but still.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
Mike,
I´m going to start paying attention to my RPMs when I'm on the
highway. Right now I'm running 30 inch tires with 4.56 gears (up from
the original 4.10) and like it a lot. I plan to put 32 inch tires on
it next year. It will be interesting to see how it runs then.
> nrs wrote:
> > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> >> I have posted this once today, but for some reason it did not post.
> >> If anyone finds it, sorry for the duplicate post.
>
> >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> >> sort in the future when these wear out. I will never upgrade to
> >> bigger than a 33" tire. As for off-roading, I do some light trail
> >> riding and the occasional hop in the mud puddle when I find one that
> >> looks fun. 80% of my driving is highway at approximately 70 miles
> >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> >> split between city driving (10%), and off-roading (10%). My main
> >> goal
> >> is to get my Jeep to drive as close as possible to the way it did
> >> bone
> >> stock (being able to use my 6th gear on the freeway) and to prevent
> >> excessive wear and tear on my clutch and engine parts. Someone
> >> please
> >> help! : D
>
> >> '06 TJ (4.0L with I-6)
> >> 6 speed manual
> >> Dana 30 front/35 rear
> >> current 3.07s
>
> >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> >> (like
> >> 44s)? I don't know if this makes any difference as far as which gear
> >> ratio to go with, but where I live (upstate NY), there can be quite a
> >> bit of snow from Dec. - Apr.
>
> > If you want it too run like it does now the ideal gear ration would be
> > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > available. The 3.73 or 4.1 would give you better performance off road
> > but your fuel economy would suffer on the road.
>
> Unfortunately the flying bricks we drive don't react the same as cars
> when it comes to low revs.
>
> Once you get the axles 'into' the air stream by raising the body away
> from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> On a lifted Jeep, anything much below 2000 rpm at highway speed will
> start the engine lugging so you need way too much gas pedal to keep up
> with wind twitches or slight hills.
>
> Everyone I know and that has posted on the newsgroups that has 'dropped'
> the overdrive with large tires and tall gears gets better mileage at
> highway speeds.
>
> My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> after calibrating the odometer when I drove it the same as before using
> all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> this day.
>
> Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> timing curve that insists on 91+ octane with a super light fiberglass
> body (it only takes two people to 'easily' pick up the whole body tub
> 'with' the seats and roll bar in it) so the thing is basically an engine
> on wheels that goes like a scalded cat, but still.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
Mike,
I´m going to start paying attention to my RPMs when I'm on the
highway. Right now I'm running 30 inch tires with 4.56 gears (up from
the original 4.10) and like it a lot. I plan to put 32 inch tires on
it next year. It will be interesting to see how it runs then.
Guest
Posts: n/a
Re: RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
> nrs wrote:
> > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> >> I have posted this once today, but for some reason it did not post.
> >> If anyone finds it, sorry for the duplicate post.
>
> >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> >> sort in the future when these wear out. I will never upgrade to
> >> bigger than a 33" tire. As for off-roading, I do some light trail
> >> riding and the occasional hop in the mud puddle when I find one that
> >> looks fun. 80% of my driving is highway at approximately 70 miles
> >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> >> split between city driving (10%), and off-roading (10%). My main
> >> goal
> >> is to get my Jeep to drive as close as possible to the way it did
> >> bone
> >> stock (being able to use my 6th gear on the freeway) and to prevent
> >> excessive wear and tear on my clutch and engine parts. Someone
> >> please
> >> help! : D
>
> >> '06 TJ (4.0L with I-6)
> >> 6 speed manual
> >> Dana 30 front/35 rear
> >> current 3.07s
>
> >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> >> (like
> >> 44s)? I don't know if this makes any difference as far as which gear
> >> ratio to go with, but where I live (upstate NY), there can be quite a
> >> bit of snow from Dec. - Apr.
>
> > If you want it too run like it does now the ideal gear ration would be
> > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > available. The 3.73 or 4.1 would give you better performance off road
> > but your fuel economy would suffer on the road.
>
> Unfortunately the flying bricks we drive don't react the same as cars
> when it comes to low revs.
>
> Once you get the axles 'into' the air stream by raising the body away
> from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> On a lifted Jeep, anything much below 2000 rpm at highway speed will
> start the engine lugging so you need way too much gas pedal to keep up
> with wind twitches or slight hills.
>
> Everyone I know and that has posted on the newsgroups that has 'dropped'
> the overdrive with large tires and tall gears gets better mileage at
> highway speeds.
>
> My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> after calibrating the odometer when I drove it the same as before using
> all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> this day.
>
> Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> timing curve that insists on 91+ octane with a super light fiberglass
> body (it only takes two people to 'easily' pick up the whole body tub
> 'with' the seats and roll bar in it) so the thing is basically an engine
> on wheels that goes like a scalded cat, but still.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
Mike,
I´m going to start paying attention to my RPMs when I'm on the
highway. Right now I'm running 30 inch tires with 4.56 gears (up from
the original 4.10) and like it a lot. I plan to put 32 inch tires on
it next year. It will be interesting to see how it runs then.
> nrs wrote:
> > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> >> I have posted this once today, but for some reason it did not post.
> >> If anyone finds it, sorry for the duplicate post.
>
> >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> >> sort in the future when these wear out. I will never upgrade to
> >> bigger than a 33" tire. As for off-roading, I do some light trail
> >> riding and the occasional hop in the mud puddle when I find one that
> >> looks fun. 80% of my driving is highway at approximately 70 miles
> >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> >> split between city driving (10%), and off-roading (10%). My main
> >> goal
> >> is to get my Jeep to drive as close as possible to the way it did
> >> bone
> >> stock (being able to use my 6th gear on the freeway) and to prevent
> >> excessive wear and tear on my clutch and engine parts. Someone
> >> please
> >> help! : D
>
> >> '06 TJ (4.0L with I-6)
> >> 6 speed manual
> >> Dana 30 front/35 rear
> >> current 3.07s
>
> >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> >> (like
> >> 44s)? I don't know if this makes any difference as far as which gear
> >> ratio to go with, but where I live (upstate NY), there can be quite a
> >> bit of snow from Dec. - Apr.
>
> > If you want it too run like it does now the ideal gear ration would be
> > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > available. The 3.73 or 4.1 would give you better performance off road
> > but your fuel economy would suffer on the road.
>
> Unfortunately the flying bricks we drive don't react the same as cars
> when it comes to low revs.
>
> Once you get the axles 'into' the air stream by raising the body away
> from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> On a lifted Jeep, anything much below 2000 rpm at highway speed will
> start the engine lugging so you need way too much gas pedal to keep up
> with wind twitches or slight hills.
>
> Everyone I know and that has posted on the newsgroups that has 'dropped'
> the overdrive with large tires and tall gears gets better mileage at
> highway speeds.
>
> My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> after calibrating the odometer when I drove it the same as before using
> all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> this day.
>
> Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> timing curve that insists on 91+ octane with a super light fiberglass
> body (it only takes two people to 'easily' pick up the whole body tub
> 'with' the seats and roll bar in it) so the thing is basically an engine
> on wheels that goes like a scalded cat, but still.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
Mike,
I´m going to start paying attention to my RPMs when I'm on the
highway. Right now I'm running 30 inch tires with 4.56 gears (up from
the original 4.10) and like it a lot. I plan to put 32 inch tires on
it next year. It will be interesting to see how it runs then.
Guest
Posts: n/a
Re: RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
> nrs wrote:
> > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> >> I have posted this once today, but for some reason it did not post.
> >> If anyone finds it, sorry for the duplicate post.
>
> >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> >> sort in the future when these wear out. I will never upgrade to
> >> bigger than a 33" tire. As for off-roading, I do some light trail
> >> riding and the occasional hop in the mud puddle when I find one that
> >> looks fun. 80% of my driving is highway at approximately 70 miles
> >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> >> split between city driving (10%), and off-roading (10%). My main
> >> goal
> >> is to get my Jeep to drive as close as possible to the way it did
> >> bone
> >> stock (being able to use my 6th gear on the freeway) and to prevent
> >> excessive wear and tear on my clutch and engine parts. Someone
> >> please
> >> help! : D
>
> >> '06 TJ (4.0L with I-6)
> >> 6 speed manual
> >> Dana 30 front/35 rear
> >> current 3.07s
>
> >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> >> (like
> >> 44s)? I don't know if this makes any difference as far as which gear
> >> ratio to go with, but where I live (upstate NY), there can be quite a
> >> bit of snow from Dec. - Apr.
>
> > If you want it too run like it does now the ideal gear ration would be
> > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > available. The 3.73 or 4.1 would give you better performance off road
> > but your fuel economy would suffer on the road.
>
> Unfortunately the flying bricks we drive don't react the same as cars
> when it comes to low revs.
>
> Once you get the axles 'into' the air stream by raising the body away
> from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> On a lifted Jeep, anything much below 2000 rpm at highway speed will
> start the engine lugging so you need way too much gas pedal to keep up
> with wind twitches or slight hills.
>
> Everyone I know and that has posted on the newsgroups that has 'dropped'
> the overdrive with large tires and tall gears gets better mileage at
> highway speeds.
>
> My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> after calibrating the odometer when I drove it the same as before using
> all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> this day.
>
> Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> timing curve that insists on 91+ octane with a super light fiberglass
> body (it only takes two people to 'easily' pick up the whole body tub
> 'with' the seats and roll bar in it) so the thing is basically an engine
> on wheels that goes like a scalded cat, but still.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
Mike,
I´m going to start paying attention to my RPMs when I'm on the
highway. Right now I'm running 30 inch tires with 4.56 gears (up from
the original 4.10) and like it a lot. I plan to put 32 inch tires on
it next year. It will be interesting to see how it runs then.
> nrs wrote:
> > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> >> I have posted this once today, but for some reason it did not post.
> >> If anyone finds it, sorry for the duplicate post.
>
> >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> >> sort in the future when these wear out. I will never upgrade to
> >> bigger than a 33" tire. As for off-roading, I do some light trail
> >> riding and the occasional hop in the mud puddle when I find one that
> >> looks fun. 80% of my driving is highway at approximately 70 miles
> >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> >> split between city driving (10%), and off-roading (10%). My main
> >> goal
> >> is to get my Jeep to drive as close as possible to the way it did
> >> bone
> >> stock (being able to use my 6th gear on the freeway) and to prevent
> >> excessive wear and tear on my clutch and engine parts. Someone
> >> please
> >> help! : D
>
> >> '06 TJ (4.0L with I-6)
> >> 6 speed manual
> >> Dana 30 front/35 rear
> >> current 3.07s
>
> >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> >> (like
> >> 44s)? I don't know if this makes any difference as far as which gear
> >> ratio to go with, but where I live (upstate NY), there can be quite a
> >> bit of snow from Dec. - Apr.
>
> > If you want it too run like it does now the ideal gear ration would be
> > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > available. The 3.73 or 4.1 would give you better performance off road
> > but your fuel economy would suffer on the road.
>
> Unfortunately the flying bricks we drive don't react the same as cars
> when it comes to low revs.
>
> Once you get the axles 'into' the air stream by raising the body away
> from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> On a lifted Jeep, anything much below 2000 rpm at highway speed will
> start the engine lugging so you need way too much gas pedal to keep up
> with wind twitches or slight hills.
>
> Everyone I know and that has posted on the newsgroups that has 'dropped'
> the overdrive with large tires and tall gears gets better mileage at
> highway speeds.
>
> My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> after calibrating the odometer when I drove it the same as before using
> all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> this day.
>
> Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> timing curve that insists on 91+ octane with a super light fiberglass
> body (it only takes two people to 'easily' pick up the whole body tub
> 'with' the seats and roll bar in it) so the thing is basically an engine
> on wheels that goes like a scalded cat, but still.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
Mike,
I´m going to start paying attention to my RPMs when I'm on the
highway. Right now I'm running 30 inch tires with 4.56 gears (up from
the original 4.10) and like it a lot. I plan to put 32 inch tires on
it next year. It will be interesting to see how it runs then.
Guest
Posts: n/a
Re: RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
On Sep 21, 3:31 pm, nrs <neale...@yahoo.com> wrote:
> On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
>
>
>
>
>
> > nrs wrote:
> > > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> > >> I have posted this once today, but for some reason it did not post.
> > >> If anyone finds it, sorry for the duplicate post.
>
> > >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> > >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> > >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> > >> sort in the future when these wear out. I will never upgrade to
> > >> bigger than a 33" tire. As for off-roading, I do some light trail
> > >> riding and the occasional hop in the mud puddle when I find one that
> > >> looks fun. 80% of my driving is highway at approximately 70 miles
> > >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> > >> split between city driving (10%), and off-roading (10%). My main
> > >> goal
> > >> is to get my Jeep to drive as close as possible to the way it did
> > >> bone
> > >> stock (being able to use my 6th gear on the freeway) and to prevent
> > >> excessive wear and tear on my clutch and engine parts. Someone
> > >> please
> > >> help! : D
>
> > >> '06 TJ (4.0L with I-6)
> > >> 6 speed manual
> > >> Dana 30 front/35 rear
> > >> current 3.07s
>
> > >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> > >> (like
> > >> 44s)? I don't know if this makes any difference as far as which gear
> > >> ratio to go with, but where I live (upstate NY), there can be quite a
> > >> bit of snow from Dec. - Apr.
>
> > > If you want it too run like it does now the ideal gear ration would be
> > > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > > available. The 3.73 or 4.1 would give you better performance off road
> > > but your fuel economy would suffer on the road.
>
> > Unfortunately the flying bricks we drive don't react the same as cars
> > when it comes to low revs.
>
> > Once you get the axles 'into' the air stream by raising the body away
> > from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> > On a lifted Jeep, anything much below 2000 rpm at highway speed will
> > start the engine lugging so you need way too much gas pedal to keep up
> > with wind twitches or slight hills.
>
> > Everyone I know and that has posted on the newsgroups that has 'dropped'
> > the overdrive with large tires and tall gears gets better mileage at
> > highway speeds.
>
> > My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> > When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> > after calibrating the odometer when I drove it the same as before using
> > all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> > As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> > 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> > this day.
>
> > Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> > timing curve that insists on 91+ octane with a super light fiberglass
> > body (it only takes two people to 'easily' pick up the whole body tub
> > 'with' the seats and roll bar in it) so the thing is basically an engine
> > on wheels that goes like a scalded cat, but still.
>
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> > Canadian Off Road Trips Photos: Non members can still view!
> > Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> > (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> > - Show quoted text -
>
> Mike,
>
> I´m going to start paying attention to my RPMs when I'm on the
> highway. Right now I'm running 30 inch tires with 4.56 gears (up from
> the original 4.10) and like it a lot. I plan to put 32 inch tires on
> it next year. It will be interesting to see how it runs then.- Hide quoted text -
>
> - Show quoted text -
If it makes any difference, my original tires were the 215/75/15. I
do not have a lift on now. Just thought about it in the future.
> On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
>
>
>
>
>
> > nrs wrote:
> > > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> > >> I have posted this once today, but for some reason it did not post.
> > >> If anyone finds it, sorry for the duplicate post.
>
> > >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> > >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> > >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> > >> sort in the future when these wear out. I will never upgrade to
> > >> bigger than a 33" tire. As for off-roading, I do some light trail
> > >> riding and the occasional hop in the mud puddle when I find one that
> > >> looks fun. 80% of my driving is highway at approximately 70 miles
> > >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> > >> split between city driving (10%), and off-roading (10%). My main
> > >> goal
> > >> is to get my Jeep to drive as close as possible to the way it did
> > >> bone
> > >> stock (being able to use my 6th gear on the freeway) and to prevent
> > >> excessive wear and tear on my clutch and engine parts. Someone
> > >> please
> > >> help! : D
>
> > >> '06 TJ (4.0L with I-6)
> > >> 6 speed manual
> > >> Dana 30 front/35 rear
> > >> current 3.07s
>
> > >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> > >> (like
> > >> 44s)? I don't know if this makes any difference as far as which gear
> > >> ratio to go with, but where I live (upstate NY), there can be quite a
> > >> bit of snow from Dec. - Apr.
>
> > > If you want it too run like it does now the ideal gear ration would be
> > > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > > available. The 3.73 or 4.1 would give you better performance off road
> > > but your fuel economy would suffer on the road.
>
> > Unfortunately the flying bricks we drive don't react the same as cars
> > when it comes to low revs.
>
> > Once you get the axles 'into' the air stream by raising the body away
> > from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> > On a lifted Jeep, anything much below 2000 rpm at highway speed will
> > start the engine lugging so you need way too much gas pedal to keep up
> > with wind twitches or slight hills.
>
> > Everyone I know and that has posted on the newsgroups that has 'dropped'
> > the overdrive with large tires and tall gears gets better mileage at
> > highway speeds.
>
> > My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> > When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> > after calibrating the odometer when I drove it the same as before using
> > all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> > As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> > 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> > this day.
>
> > Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> > timing curve that insists on 91+ octane with a super light fiberglass
> > body (it only takes two people to 'easily' pick up the whole body tub
> > 'with' the seats and roll bar in it) so the thing is basically an engine
> > on wheels that goes like a scalded cat, but still.
>
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> > Canadian Off Road Trips Photos: Non members can still view!
> > Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> > (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> > - Show quoted text -
>
> Mike,
>
> I´m going to start paying attention to my RPMs when I'm on the
> highway. Right now I'm running 30 inch tires with 4.56 gears (up from
> the original 4.10) and like it a lot. I plan to put 32 inch tires on
> it next year. It will be interesting to see how it runs then.- Hide quoted text -
>
> - Show quoted text -
If it makes any difference, my original tires were the 215/75/15. I
do not have a lift on now. Just thought about it in the future.
Guest
Posts: n/a
Re: RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
On Sep 21, 3:31 pm, nrs <neale...@yahoo.com> wrote:
> On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
>
>
>
>
>
> > nrs wrote:
> > > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> > >> I have posted this once today, but for some reason it did not post.
> > >> If anyone finds it, sorry for the duplicate post.
>
> > >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> > >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> > >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> > >> sort in the future when these wear out. I will never upgrade to
> > >> bigger than a 33" tire. As for off-roading, I do some light trail
> > >> riding and the occasional hop in the mud puddle when I find one that
> > >> looks fun. 80% of my driving is highway at approximately 70 miles
> > >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> > >> split between city driving (10%), and off-roading (10%). My main
> > >> goal
> > >> is to get my Jeep to drive as close as possible to the way it did
> > >> bone
> > >> stock (being able to use my 6th gear on the freeway) and to prevent
> > >> excessive wear and tear on my clutch and engine parts. Someone
> > >> please
> > >> help! : D
>
> > >> '06 TJ (4.0L with I-6)
> > >> 6 speed manual
> > >> Dana 30 front/35 rear
> > >> current 3.07s
>
> > >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> > >> (like
> > >> 44s)? I don't know if this makes any difference as far as which gear
> > >> ratio to go with, but where I live (upstate NY), there can be quite a
> > >> bit of snow from Dec. - Apr.
>
> > > If you want it too run like it does now the ideal gear ration would be
> > > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > > available. The 3.73 or 4.1 would give you better performance off road
> > > but your fuel economy would suffer on the road.
>
> > Unfortunately the flying bricks we drive don't react the same as cars
> > when it comes to low revs.
>
> > Once you get the axles 'into' the air stream by raising the body away
> > from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> > On a lifted Jeep, anything much below 2000 rpm at highway speed will
> > start the engine lugging so you need way too much gas pedal to keep up
> > with wind twitches or slight hills.
>
> > Everyone I know and that has posted on the newsgroups that has 'dropped'
> > the overdrive with large tires and tall gears gets better mileage at
> > highway speeds.
>
> > My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> > When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> > after calibrating the odometer when I drove it the same as before using
> > all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> > As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> > 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> > this day.
>
> > Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> > timing curve that insists on 91+ octane with a super light fiberglass
> > body (it only takes two people to 'easily' pick up the whole body tub
> > 'with' the seats and roll bar in it) so the thing is basically an engine
> > on wheels that goes like a scalded cat, but still.
>
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> > Canadian Off Road Trips Photos: Non members can still view!
> > Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> > (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> > - Show quoted text -
>
> Mike,
>
> I´m going to start paying attention to my RPMs when I'm on the
> highway. Right now I'm running 30 inch tires with 4.56 gears (up from
> the original 4.10) and like it a lot. I plan to put 32 inch tires on
> it next year. It will be interesting to see how it runs then.- Hide quoted text -
>
> - Show quoted text -
If it makes any difference, my original tires were the 215/75/15. I
do not have a lift on now. Just thought about it in the future.
> On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
>
>
>
>
>
> > nrs wrote:
> > > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> > >> I have posted this once today, but for some reason it did not post.
> > >> If anyone finds it, sorry for the duplicate post.
>
> > >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> > >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> > >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> > >> sort in the future when these wear out. I will never upgrade to
> > >> bigger than a 33" tire. As for off-roading, I do some light trail
> > >> riding and the occasional hop in the mud puddle when I find one that
> > >> looks fun. 80% of my driving is highway at approximately 70 miles
> > >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> > >> split between city driving (10%), and off-roading (10%). My main
> > >> goal
> > >> is to get my Jeep to drive as close as possible to the way it did
> > >> bone
> > >> stock (being able to use my 6th gear on the freeway) and to prevent
> > >> excessive wear and tear on my clutch and engine parts. Someone
> > >> please
> > >> help! : D
>
> > >> '06 TJ (4.0L with I-6)
> > >> 6 speed manual
> > >> Dana 30 front/35 rear
> > >> current 3.07s
>
> > >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> > >> (like
> > >> 44s)? I don't know if this makes any difference as far as which gear
> > >> ratio to go with, but where I live (upstate NY), there can be quite a
> > >> bit of snow from Dec. - Apr.
>
> > > If you want it too run like it does now the ideal gear ration would be
> > > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > > available. The 3.73 or 4.1 would give you better performance off road
> > > but your fuel economy would suffer on the road.
>
> > Unfortunately the flying bricks we drive don't react the same as cars
> > when it comes to low revs.
>
> > Once you get the axles 'into' the air stream by raising the body away
> > from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> > On a lifted Jeep, anything much below 2000 rpm at highway speed will
> > start the engine lugging so you need way too much gas pedal to keep up
> > with wind twitches or slight hills.
>
> > Everyone I know and that has posted on the newsgroups that has 'dropped'
> > the overdrive with large tires and tall gears gets better mileage at
> > highway speeds.
>
> > My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> > When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> > after calibrating the odometer when I drove it the same as before using
> > all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> > As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> > 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> > this day.
>
> > Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> > timing curve that insists on 91+ octane with a super light fiberglass
> > body (it only takes two people to 'easily' pick up the whole body tub
> > 'with' the seats and roll bar in it) so the thing is basically an engine
> > on wheels that goes like a scalded cat, but still.
>
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> > Canadian Off Road Trips Photos: Non members can still view!
> > Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> > (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> > - Show quoted text -
>
> Mike,
>
> I´m going to start paying attention to my RPMs when I'm on the
> highway. Right now I'm running 30 inch tires with 4.56 gears (up from
> the original 4.10) and like it a lot. I plan to put 32 inch tires on
> it next year. It will be interesting to see how it runs then.- Hide quoted text -
>
> - Show quoted text -
If it makes any difference, my original tires were the 215/75/15. I
do not have a lift on now. Just thought about it in the future.
Guest
Posts: n/a
Re: RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
On Sep 21, 3:31 pm, nrs <neale...@yahoo.com> wrote:
> On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
>
>
>
>
>
> > nrs wrote:
> > > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> > >> I have posted this once today, but for some reason it did not post.
> > >> If anyone finds it, sorry for the duplicate post.
>
> > >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> > >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> > >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> > >> sort in the future when these wear out. I will never upgrade to
> > >> bigger than a 33" tire. As for off-roading, I do some light trail
> > >> riding and the occasional hop in the mud puddle when I find one that
> > >> looks fun. 80% of my driving is highway at approximately 70 miles
> > >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> > >> split between city driving (10%), and off-roading (10%). My main
> > >> goal
> > >> is to get my Jeep to drive as close as possible to the way it did
> > >> bone
> > >> stock (being able to use my 6th gear on the freeway) and to prevent
> > >> excessive wear and tear on my clutch and engine parts. Someone
> > >> please
> > >> help! : D
>
> > >> '06 TJ (4.0L with I-6)
> > >> 6 speed manual
> > >> Dana 30 front/35 rear
> > >> current 3.07s
>
> > >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> > >> (like
> > >> 44s)? I don't know if this makes any difference as far as which gear
> > >> ratio to go with, but where I live (upstate NY), there can be quite a
> > >> bit of snow from Dec. - Apr.
>
> > > If you want it too run like it does now the ideal gear ration would be
> > > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > > available. The 3.73 or 4.1 would give you better performance off road
> > > but your fuel economy would suffer on the road.
>
> > Unfortunately the flying bricks we drive don't react the same as cars
> > when it comes to low revs.
>
> > Once you get the axles 'into' the air stream by raising the body away
> > from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> > On a lifted Jeep, anything much below 2000 rpm at highway speed will
> > start the engine lugging so you need way too much gas pedal to keep up
> > with wind twitches or slight hills.
>
> > Everyone I know and that has posted on the newsgroups that has 'dropped'
> > the overdrive with large tires and tall gears gets better mileage at
> > highway speeds.
>
> > My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> > When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> > after calibrating the odometer when I drove it the same as before using
> > all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> > As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> > 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> > this day.
>
> > Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> > timing curve that insists on 91+ octane with a super light fiberglass
> > body (it only takes two people to 'easily' pick up the whole body tub
> > 'with' the seats and roll bar in it) so the thing is basically an engine
> > on wheels that goes like a scalded cat, but still.
>
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> > Canadian Off Road Trips Photos: Non members can still view!
> > Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> > (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> > - Show quoted text -
>
> Mike,
>
> I´m going to start paying attention to my RPMs when I'm on the
> highway. Right now I'm running 30 inch tires with 4.56 gears (up from
> the original 4.10) and like it a lot. I plan to put 32 inch tires on
> it next year. It will be interesting to see how it runs then.- Hide quoted text -
>
> - Show quoted text -
If it makes any difference, my original tires were the 215/75/15. I
do not have a lift on now. Just thought about it in the future.
> On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
>
>
>
>
>
> > nrs wrote:
> > > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> > >> I have posted this once today, but for some reason it did not post.
> > >> If anyone finds it, sorry for the duplicate post.
>
> > >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> > >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> > >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> > >> sort in the future when these wear out. I will never upgrade to
> > >> bigger than a 33" tire. As for off-roading, I do some light trail
> > >> riding and the occasional hop in the mud puddle when I find one that
> > >> looks fun. 80% of my driving is highway at approximately 70 miles
> > >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> > >> split between city driving (10%), and off-roading (10%). My main
> > >> goal
> > >> is to get my Jeep to drive as close as possible to the way it did
> > >> bone
> > >> stock (being able to use my 6th gear on the freeway) and to prevent
> > >> excessive wear and tear on my clutch and engine parts. Someone
> > >> please
> > >> help! : D
>
> > >> '06 TJ (4.0L with I-6)
> > >> 6 speed manual
> > >> Dana 30 front/35 rear
> > >> current 3.07s
>
> > >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> > >> (like
> > >> 44s)? I don't know if this makes any difference as far as which gear
> > >> ratio to go with, but where I live (upstate NY), there can be quite a
> > >> bit of snow from Dec. - Apr.
>
> > > If you want it too run like it does now the ideal gear ration would be
> > > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > > available. The 3.73 or 4.1 would give you better performance off road
> > > but your fuel economy would suffer on the road.
>
> > Unfortunately the flying bricks we drive don't react the same as cars
> > when it comes to low revs.
>
> > Once you get the axles 'into' the air stream by raising the body away
> > from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> > On a lifted Jeep, anything much below 2000 rpm at highway speed will
> > start the engine lugging so you need way too much gas pedal to keep up
> > with wind twitches or slight hills.
>
> > Everyone I know and that has posted on the newsgroups that has 'dropped'
> > the overdrive with large tires and tall gears gets better mileage at
> > highway speeds.
>
> > My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> > When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> > after calibrating the odometer when I drove it the same as before using
> > all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> > As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> > 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> > this day.
>
> > Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> > timing curve that insists on 91+ octane with a super light fiberglass
> > body (it only takes two people to 'easily' pick up the whole body tub
> > 'with' the seats and roll bar in it) so the thing is basically an engine
> > on wheels that goes like a scalded cat, but still.
>
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> > Canadian Off Road Trips Photos: Non members can still view!
> > Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> > (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> > - Show quoted text -
>
> Mike,
>
> I´m going to start paying attention to my RPMs when I'm on the
> highway. Right now I'm running 30 inch tires with 4.56 gears (up from
> the original 4.10) and like it a lot. I plan to put 32 inch tires on
> it next year. It will be interesting to see how it runs then.- Hide quoted text -
>
> - Show quoted text -
If it makes any difference, my original tires were the 215/75/15. I
do not have a lift on now. Just thought about it in the future.
Guest
Posts: n/a
Re: RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
On Sep 21, 3:31 pm, nrs <neale...@yahoo.com> wrote:
> On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
>
>
>
>
>
> > nrs wrote:
> > > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> > >> I have posted this once today, but for some reason it did not post.
> > >> If anyone finds it, sorry for the duplicate post.
>
> > >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> > >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> > >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> > >> sort in the future when these wear out. I will never upgrade to
> > >> bigger than a 33" tire. As for off-roading, I do some light trail
> > >> riding and the occasional hop in the mud puddle when I find one that
> > >> looks fun. 80% of my driving is highway at approximately 70 miles
> > >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> > >> split between city driving (10%), and off-roading (10%). My main
> > >> goal
> > >> is to get my Jeep to drive as close as possible to the way it did
> > >> bone
> > >> stock (being able to use my 6th gear on the freeway) and to prevent
> > >> excessive wear and tear on my clutch and engine parts. Someone
> > >> please
> > >> help! : D
>
> > >> '06 TJ (4.0L with I-6)
> > >> 6 speed manual
> > >> Dana 30 front/35 rear
> > >> current 3.07s
>
> > >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> > >> (like
> > >> 44s)? I don't know if this makes any difference as far as which gear
> > >> ratio to go with, but where I live (upstate NY), there can be quite a
> > >> bit of snow from Dec. - Apr.
>
> > > If you want it too run like it does now the ideal gear ration would be
> > > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > > available. The 3.73 or 4.1 would give you better performance off road
> > > but your fuel economy would suffer on the road.
>
> > Unfortunately the flying bricks we drive don't react the same as cars
> > when it comes to low revs.
>
> > Once you get the axles 'into' the air stream by raising the body away
> > from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> > On a lifted Jeep, anything much below 2000 rpm at highway speed will
> > start the engine lugging so you need way too much gas pedal to keep up
> > with wind twitches or slight hills.
>
> > Everyone I know and that has posted on the newsgroups that has 'dropped'
> > the overdrive with large tires and tall gears gets better mileage at
> > highway speeds.
>
> > My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> > When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> > after calibrating the odometer when I drove it the same as before using
> > all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> > As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> > 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> > this day.
>
> > Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> > timing curve that insists on 91+ octane with a super light fiberglass
> > body (it only takes two people to 'easily' pick up the whole body tub
> > 'with' the seats and roll bar in it) so the thing is basically an engine
> > on wheels that goes like a scalded cat, but still.
>
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> > Canadian Off Road Trips Photos: Non members can still view!
> > Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> > (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> > - Show quoted text -
>
> Mike,
>
> I´m going to start paying attention to my RPMs when I'm on the
> highway. Right now I'm running 30 inch tires with 4.56 gears (up from
> the original 4.10) and like it a lot. I plan to put 32 inch tires on
> it next year. It will be interesting to see how it runs then.- Hide quoted text -
>
> - Show quoted text -
If it makes any difference, my original tires were the 215/75/15. I
do not have a lift on now. Just thought about it in the future.
> On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
>
>
>
>
>
> > nrs wrote:
> > > On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
> > >> I have posted this once today, but for some reason it did not post.
> > >> If anyone finds it, sorry for the duplicate post.
>
> > >> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
> > >> the 4.11 ratio would be better for me. I currently have 31" BFG All
> > >> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
> > >> sort in the future when these wear out. I will never upgrade to
> > >> bigger than a 33" tire. As for off-roading, I do some light trail
> > >> riding and the occasional hop in the mud puddle when I find one that
> > >> looks fun. 80% of my driving is highway at approximately 70 miles
> > >> round trip at a speed of anywhere from 60-70 mph. The other 20% is
> > >> split between city driving (10%), and off-roading (10%). My main
> > >> goal
> > >> is to get my Jeep to drive as close as possible to the way it did
> > >> bone
> > >> stock (being able to use my 6th gear on the freeway) and to prevent
> > >> excessive wear and tear on my clutch and engine parts. Someone
> > >> please
> > >> help! : D
>
> > >> '06 TJ (4.0L with I-6)
> > >> 6 speed manual
> > >> Dana 30 front/35 rear
> > >> current 3.07s
>
> > >> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
> > >> (like
> > >> 44s)? I don't know if this makes any difference as far as which gear
> > >> ratio to go with, but where I live (upstate NY), there can be quite a
> > >> bit of snow from Dec. - Apr.
>
> > > If you want it too run like it does now the ideal gear ration would be
> > > 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
> > > available. The 3.73 or 4.1 would give you better performance off road
> > > but your fuel economy would suffer on the road.
>
> > Unfortunately the flying bricks we drive don't react the same as cars
> > when it comes to low revs.
>
> > Once you get the axles 'into' the air stream by raising the body away
> > from them with a suspension lift, it reacts 'strongly' to wind resistance.
>
> > On a lifted Jeep, anything much below 2000 rpm at highway speed will
> > start the engine lugging so you need way too much gas pedal to keep up
> > with wind twitches or slight hills.
>
> > Everyone I know and that has posted on the newsgroups that has 'dropped'
> > the overdrive with large tires and tall gears gets better mileage at
> > highway speeds.
>
> > My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
> > When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
> > after calibrating the odometer when I drove it the same as before using
> > all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>
> > As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
> > 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
> > this day.
>
> > Now I do have a manually 'tuned' carb engine with a 'hot' spark and
> > timing curve that insists on 91+ octane with a super light fiberglass
> > body (it only takes two people to 'easily' pick up the whole body tub
> > 'with' the seats and roll bar in it) so the thing is basically an engine
> > on wheels that goes like a scalded cat, but still.
>
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> > Canadian Off Road Trips Photos: Non members can still view!
> > Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> > (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> > - Show quoted text -
>
> Mike,
>
> I´m going to start paying attention to my RPMs when I'm on the
> highway. Right now I'm running 30 inch tires with 4.56 gears (up from
> the original 4.10) and like it a lot. I plan to put 32 inch tires on
> it next year. It will be interesting to see how it runs then.- Hide quoted text -
>
> - Show quoted text -
If it makes any difference, my original tires were the 215/75/15. I
do not have a lift on now. Just thought about it in the future.
Guest
Posts: n/a
Re: RE-GEARING TO EITHER 3.73 OR 4.11 (repeat -- sorry)
Tracie wrote:
> On Sep 21, 3:31 pm, nrs <neale...@yahoo.com> wrote:
>> On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
>>
>>
>>
>>
>>
>>> nrs wrote:
>>>> On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
>>>>> I have posted this once today, but for some reason it did not post.
>>>>> If anyone finds it, sorry for the duplicate post.
>>>>> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
>>>>> the 4.11 ratio would be better for me. I currently have 31" BFG All
>>>>> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
>>>>> sort in the future when these wear out. I will never upgrade to
>>>>> bigger than a 33" tire. As for off-roading, I do some light trail
>>>>> riding and the occasional hop in the mud puddle when I find one that
>>>>> looks fun. 80% of my driving is highway at approximately 70 miles
>>>>> round trip at a speed of anywhere from 60-70 mph. The other 20% is
>>>>> split between city driving (10%), and off-roading (10%). My main
>>>>> goal
>>>>> is to get my Jeep to drive as close as possible to the way it did
>>>>> bone
>>>>> stock (being able to use my 6th gear on the freeway) and to prevent
>>>>> excessive wear and tear on my clutch and engine parts. Someone
>>>>> please
>>>>> help! : D
>>>>> '06 TJ (4.0L with I-6)
>>>>> 6 speed manual
>>>>> Dana 30 front/35 rear
>>>>> current 3.07s
>>>>> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
>>>>> (like
>>>>> 44s)? I don't know if this makes any difference as far as which gear
>>>>> ratio to go with, but where I live (upstate NY), there can be quite a
>>>>> bit of snow from Dec. - Apr.
>>>> If you want it too run like it does now the ideal gear ration would be
>>>> 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
>>>> available. The 3.73 or 4.1 would give you better performance off road
>>>> but your fuel economy would suffer on the road.
>>> Unfortunately the flying bricks we drive don't react the same as cars
>>> when it comes to low revs.
>>> Once you get the axles 'into' the air stream by raising the body away
>>> from them with a suspension lift, it reacts 'strongly' to wind resistance.
>>> On a lifted Jeep, anything much below 2000 rpm at highway speed will
>>> start the engine lugging so you need way too much gas pedal to keep up
>>> with wind twitches or slight hills.
>>> Everyone I know and that has posted on the newsgroups that has 'dropped'
>>> the overdrive with large tires and tall gears gets better mileage at
>>> highway speeds.
>>> My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
>>> When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
>>> after calibrating the odometer when I drove it the same as before using
>>> all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>>> As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
>>> 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
>>> this day.
>>> Now I do have a manually 'tuned' carb engine with a 'hot' spark and
>>> timing curve that insists on 91+ octane with a super light fiberglass
>>> body (it only takes two people to 'easily' pick up the whole body tub
>>> 'with' the seats and roll bar in it) so the thing is basically an engine
>>> on wheels that goes like a scalded cat, but still.
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>>> Canadian Off Road Trips Photos: Non members can still view!
>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>>> (More Off Road album links at bottom of the view page)- Hide quoted text -
>>> - Show quoted text -
>> Mike,
>>
>> I´m going to start paying attention to my RPMs when I'm on the
>> highway. Right now I'm running 30 inch tires with 4.56 gears (up from
>> the original 4.10) and like it a lot. I plan to put 32 inch tires on
>> it next year. It will be interesting to see how it runs then.- Hide quoted text -
>>
>> - Show quoted text -
>
> If it makes any difference, my original tires were the 215/75/15. I
> do not have a lift on now. Just thought about it in the future.
>
That is why I was thinking 4.11s to match or for the 'power feel', once
lifted, 4.56's.
You can easily check your mileage as the modifications happen. You do
enough highway driving that it can be figured easy which gear works the
'best' for 'you'.
You don't need to run full tanks for tests, you can fill up after each
highway run or two, or each circuit of your normal daily 'route'.
Mike
> On Sep 21, 3:31 pm, nrs <neale...@yahoo.com> wrote:
>> On Sep 21, 2:09 pm, Mike Romain <roma...@sympatico.ca> wrote:
>>
>>
>>
>>
>>
>>> nrs wrote:
>>>> On Sep 21, 10:47 am, Tracie <brain...@upstate.edu> wrote:
>>>>> I have posted this once today, but for some reason it did not post.
>>>>> If anyone finds it, sorry for the duplicate post.
>>>>> Anyhoo, I definitely want to re-gear but I am not sure if the 3.73 or
>>>>> the 4.11 ratio would be better for me. I currently have 31" BFG All
>>>>> Terrain T/A KOs, but will definitely upgrade to a 33" tire of some
>>>>> sort in the future when these wear out. I will never upgrade to
>>>>> bigger than a 33" tire. As for off-roading, I do some light trail
>>>>> riding and the occasional hop in the mud puddle when I find one that
>>>>> looks fun. 80% of my driving is highway at approximately 70 miles
>>>>> round trip at a speed of anywhere from 60-70 mph. The other 20% is
>>>>> split between city driving (10%), and off-roading (10%). My main
>>>>> goal
>>>>> is to get my Jeep to drive as close as possible to the way it did
>>>>> bone
>>>>> stock (being able to use my 6th gear on the freeway) and to prevent
>>>>> excessive wear and tear on my clutch and engine parts. Someone
>>>>> please
>>>>> help! : D
>>>>> '06 TJ (4.0L with I-6)
>>>>> 6 speed manual
>>>>> Dana 30 front/35 rear
>>>>> current 3.07s
>>>>> P.S. Would I also need to upgrade my Dana 30/35 to a bigger one
>>>>> (like
>>>>> 44s)? I don't know if this makes any difference as far as which gear
>>>>> ratio to go with, but where I live (upstate NY), there can be quite a
>>>>> bit of snow from Dec. - Apr.
>>>> If you want it too run like it does now the ideal gear ration would be
>>>> 3.07*33/31 = 3.27 rounded up to what is available. 3.55 seems to be
>>>> available. The 3.73 or 4.1 would give you better performance off road
>>>> but your fuel economy would suffer on the road.
>>> Unfortunately the flying bricks we drive don't react the same as cars
>>> when it comes to low revs.
>>> Once you get the axles 'into' the air stream by raising the body away
>>> from them with a suspension lift, it reacts 'strongly' to wind resistance.
>>> On a lifted Jeep, anything much below 2000 rpm at highway speed will
>>> start the engine lugging so you need way too much gas pedal to keep up
>>> with wind twitches or slight hills.
>>> Everyone I know and that has posted on the newsgroups that has 'dropped'
>>> the overdrive with large tires and tall gears gets better mileage at
>>> highway speeds.
>>> My CJ7 came with overdrive (5th) and 3.31 gears or 'mileage' gears.
>>> When I lifted it 3" and put 33's on, my mileage dropped by about 8 mpg
>>> after calibrating the odometer when I drove it the same as before using
>>> all the gears. It just 'doesn't' like 1750 rpm at 65 mph...
>>> As soon as I stopped using 5th so I stayed in the 2300-2400 rpm range at
>>> 65 mph, my mileage jumped way up and has stayed a consistent 23 mpg to
>>> this day.
>>> Now I do have a manually 'tuned' carb engine with a 'hot' spark and
>>> timing curve that insists on 91+ octane with a super light fiberglass
>>> body (it only takes two people to 'easily' pick up the whole body tub
>>> 'with' the seats and roll bar in it) so the thing is basically an engine
>>> on wheels that goes like a scalded cat, but still.
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
>>> Canadian Off Road Trips Photos: Non members can still view!
>>> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
>>> (More Off Road album links at bottom of the view page)- Hide quoted text -
>>> - Show quoted text -
>> Mike,
>>
>> I´m going to start paying attention to my RPMs when I'm on the
>> highway. Right now I'm running 30 inch tires with 4.56 gears (up from
>> the original 4.10) and like it a lot. I plan to put 32 inch tires on
>> it next year. It will be interesting to see how it runs then.- Hide quoted text -
>>
>> - Show quoted text -
>
> If it makes any difference, my original tires were the 215/75/15. I
> do not have a lift on now. Just thought about it in the future.
>
That is why I was thinking 4.11s to match or for the 'power feel', once
lifted, 4.56's.
You can easily check your mileage as the modifications happen. You do
enough highway driving that it can be figured easy which gear works the
'best' for 'you'.
You don't need to run full tanks for tests, you can fill up after each
highway run or two, or each circuit of your normal daily 'route'.
Mike
