If I wind my CJ7's 258 up to 3000 rpm in 4th gear, I am doing about 80
mph. At 65 mph I turn 2300 rpm in 4th and 1700 in 5th. I prefer the
2300 rpm and get a lot better mileage there than lugging along at 1700
rpm.

But I have on 33's turned by 3.31 gears.... ;-)

The red line on mine is only 4500 rpm, but at least it will pull to 4400
now, then it hits the wall. Stock with the emissions computer in the
loop, it seemed to be governed to 3500 or so.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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)

Jeff Strickland wrote:
>
> How often to you get to go 60? I only hit sixty on my way to 70+, then I hit
> it again on my way back down.
>
> As a point of comparison, I have a '95 Bronco with a 5.8L (351 ci) motor,
> and I'm turning closer to 1500 at 60.
>
> My Jeep with the 258 won't even go much faster than 3500 rpm, and that seems
> like a strain. I gotta think that you'll be hating life at 2650 rpm doing
> 60, and you'll hate 3000 rpm doing 70 even more.
>
> "kion" <hhassey@gmail.com> wrote in message
> news:1155669869.471038.145720@i42g2000cwa.googlegr oups.com...
> >
> > Jeff Strickland ha escrito:
> >
> >> 4.56s with 30" tires will be pretty low. The engine will be runing very
> >> fast
> >> at freeway speeds.
> >
> > According to my calculations going at
> > 60 MPH i will be at 2650 RPM
> > That does not sound unliveable But I really do not want to take a wrong
> > desicion.
> >

 

If I wind my CJ7's 258 up to 3000 rpm in 4th gear, I am doing about 80
mph. At 65 mph I turn 2300 rpm in 4th and 1700 in 5th. I prefer the
2300 rpm and get a lot better mileage there than lugging along at 1700
rpm.

But I have on 33's turned by 3.31 gears.... ;-)

The red line on mine is only 4500 rpm, but at least it will pull to 4400
now, then it hits the wall. Stock with the emissions computer in the
loop, it seemed to be governed to 3500 or so.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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)

Jeff Strickland wrote:
>
> How often to you get to go 60? I only hit sixty on my way to 70+, then I hit
> it again on my way back down.
>
> As a point of comparison, I have a '95 Bronco with a 5.8L (351 ci) motor,
> and I'm turning closer to 1500 at 60.
>
> My Jeep with the 258 won't even go much faster than 3500 rpm, and that seems
> like a strain. I gotta think that you'll be hating life at 2650 rpm doing
> 60, and you'll hate 3000 rpm doing 70 even more.
>
> "kion" <hhassey@gmail.com> wrote in message
> news:1155669869.471038.145720@i42g2000cwa.googlegr oups.com...
> >
> > Jeff Strickland ha escrito:
> >
> >> 4.56s with 30" tires will be pretty low. The engine will be runing very
> >> fast
> >> at freeway speeds.
> >
> > According to my calculations going at
> > 60 MPH i will be at 2650 RPM
> > That does not sound unliveable But I really do not want to take a wrong
> > desicion.
> >

 

If I wind my CJ7's 258 up to 3000 rpm in 4th gear, I am doing about 80
mph. At 65 mph I turn 2300 rpm in 4th and 1700 in 5th. I prefer the
2300 rpm and get a lot better mileage there than lugging along at 1700
rpm.

But I have on 33's turned by 3.31 gears.... ;-)

The red line on mine is only 4500 rpm, but at least it will pull to 4400
now, then it hits the wall. Stock with the emissions computer in the
loop, it seemed to be governed to 3500 or so.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
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)

Jeff Strickland wrote:
>
> How often to you get to go 60? I only hit sixty on my way to 70+, then I hit
> it again on my way back down.
>
> As a point of comparison, I have a '95 Bronco with a 5.8L (351 ci) motor,
> and I'm turning closer to 1500 at 60.
>
> My Jeep with the 258 won't even go much faster than 3500 rpm, and that seems
> like a strain. I gotta think that you'll be hating life at 2650 rpm doing
> 60, and you'll hate 3000 rpm doing 70 even more.
>
> "kion" <hhassey@gmail.com> wrote in message
> news:1155669869.471038.145720@i42g2000cwa.googlegr oups.com...
> >
> > Jeff Strickland ha escrito:
> >
> >> 4.56s with 30" tires will be pretty low. The engine will be runing very
> >> fast
> >> at freeway speeds.
> >
> > According to my calculations going at
> > 60 MPH i will be at 2650 RPM
> > That does not sound unliveable But I really do not want to take a wrong
> > desicion.
> >

 

The wear and tear on your engine and reduced fuel economy might be a
consideration here too.

Kate
06 Rubicon

"kion" <hhassey@gmail.com> wrote in message
news:1155669869.471038.145720@i42g2000cwa.googlegr oups.com...
>
> Jeff Strickland ha escrito:
>
>> 4.56s with 30" tires will be pretty low. The engine will be runing very
>> fast
>> at freeway speeds.
>
> According to my calculations going at
> 60 MPH i will be at 2650 RPM
> That does not sound unliveable But I really do not want to take a wrong
> desicion.
>

 

The wear and tear on your engine and reduced fuel economy might be a
consideration here too.

Kate
06 Rubicon

"kion" <hhassey@gmail.com> wrote in message
news:1155669869.471038.145720@i42g2000cwa.googlegr oups.com...
>
> Jeff Strickland ha escrito:
>
>> 4.56s with 30" tires will be pretty low. The engine will be runing very
>> fast
>> at freeway speeds.
>
> According to my calculations going at
> 60 MPH i will be at 2650 RPM
> That does not sound unliveable But I really do not want to take a wrong
> desicion.
>

 

The wear and tear on your engine and reduced fuel economy might be a
consideration here too.

Kate
06 Rubicon

"kion" <hhassey@gmail.com> wrote in message
news:1155669869.471038.145720@i42g2000cwa.googlegr oups.com...
>
> Jeff Strickland ha escrito:
>
>> 4.56s with 30" tires will be pretty low. The engine will be runing very
>> fast
>> at freeway speeds.
>
> According to my calculations going at
> 60 MPH i will be at 2650 RPM
> That does not sound unliveable But I really do not want to take a wrong
> desicion.
>

 

The wear and tear on your engine and reduced fuel economy might be a
consideration here too.

Kate
06 Rubicon

"kion" <hhassey@gmail.com> wrote in message
news:1155669869.471038.145720@i42g2000cwa.googlegr oups.com...
>
> Jeff Strickland ha escrito:
>
>> 4.56s with 30" tires will be pretty low. The engine will be runing very
>> fast
>> at freeway speeds.
>
> According to my calculations going at
> 60 MPH i will be at 2650 RPM
> That does not sound unliveable But I really do not want to take a wrong
> desicion.
>

 

You're more likely to break an axle locked on 31's then you are open on
33's. My advice would be to get the 31's, leave the stock gears. Go to
4.56's when you get 33's and leave it open, if you want to lock it get a
D44. A D35 WILL break very easily if locked.

A TJ open on 33's will wheel very well.

Carl


"kion" <hhassey@gmail.com> wrote in message
news:1155656224.578254.145060@i3g2000cwc.googlegro ups.com...
>I Have a 2005 TJ with 4.0L and 3.07 with 30.6 tires, in my next upgrade
> i'm installing a detroit locker on the rear axle and a True Track in
> the front axle with 4.56 Gears? What are your experience with this
> setup?
>
> I'm specially concerned about the gear ratio, since i'm not very sure
> weather to install the 4.11 or the 4.56. I have not installed 33's
> because I do not want to break an axle. but probably will.
>
> Please any experience Will be of great help.
>

 

You're more likely to break an axle locked on 31's then you are open on
33's. My advice would be to get the 31's, leave the stock gears. Go to
4.56's when you get 33's and leave it open, if you want to lock it get a
D44. A D35 WILL break very easily if locked.

A TJ open on 33's will wheel very well.

Carl


"kion" <hhassey@gmail.com> wrote in message
news:1155656224.578254.145060@i3g2000cwc.googlegro ups.com...
>I Have a 2005 TJ with 4.0L and 3.07 with 30.6 tires, in my next upgrade
> i'm installing a detroit locker on the rear axle and a True Track in
> the front axle with 4.56 Gears? What are your experience with this
> setup?
>
> I'm specially concerned about the gear ratio, since i'm not very sure
> weather to install the 4.11 or the 4.56. I have not installed 33's
> because I do not want to break an axle. but probably will.
>
> Please any experience Will be of great help.
>

 

You're more likely to break an axle locked on 31's then you are open on
33's. My advice would be to get the 31's, leave the stock gears. Go to
4.56's when you get 33's and leave it open, if you want to lock it get a
D44. A D35 WILL break very easily if locked.

A TJ open on 33's will wheel very well.

Carl


"kion" <hhassey@gmail.com> wrote in message
news:1155656224.578254.145060@i3g2000cwc.googlegro ups.com...
>I Have a 2005 TJ with 4.0L and 3.07 with 30.6 tires, in my next upgrade
> i'm installing a detroit locker on the rear axle and a True Track in
> the front axle with 4.56 Gears? What are your experience with this
> setup?
>
> I'm specially concerned about the gear ratio, since i'm not very sure
> weather to install the 4.11 or the 4.56. I have not installed 33's
> because I do not want to break an axle. but probably will.
>
> Please any experience Will be of great help.
>