First automatic
#81
Guest
Posts: n/a
Re: First automatic
"Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>I have driven the 05 Grand off road and know exacly what you are
> talking about.
> The transmisssion is a Mercedes triptronic unit and isn't usually used
> with such a low ratio. This means it shifts fast and harder than you
> might expect when in low As you no doubt have found by now the jump
> between 1st and 2 nd is quite big.
> The best thing I found was to run in 2nd and 3rd most of the time and
> when 1st was needed come to a complete stop before or as I down shifted
> into 1st.
>
> Hope this helps
> John
I did not think that I had anything to contribute, but seeing Mr. Muddy's
info i guess i do...
Wife and I own twin 1999 Jeep Grand Cherokees. What we have done on trips
is rent the same car that we would think of buying and so last month, in
Dallas, we rented a 2005 Jeep Grand Cherokee. We were very underwhelmed.
Especially with the Tiptronic transmission. Leaving it alone, in D, it
revved, then lugged, then when I put more push on the accelerator, it
downshifted and revved like hell, then upshifted, and hit a small wall, then
slowly deaccelerated, until It down shifted again. We had this turkey for a
week and I figured out that the engine and the transmission are strangers to
each other. So I figured out how to start it up, and it's in D, and I flip
it left, left, left, to downshift, until i get what i want, then flip it
right, then it gets up there then i flip it right, etc. I might as well be
driving a manual shift. It just takes too much attention. It is very
poorly designed.
And to top that off, all the nice amenities, like the rear of the steering
wheel switches, the monitor in the ceiling - all gone. Maybe we rented the
cheap model, but I sure didn't think so.
I got my Consumer Reports (they don't know anything about cars, remembering
that in 1964 they thought that the Nash Rambler was the best car) but they
voted the 2005 Jeep Grand Cherokee the worst SUV (whatever that is) that
they tested.
So the Germans are now putting transmissions in US Jeeps? History has shown
that the Germans have never understood Jeeps, and I spent 26 years in the US
Army in Jeeps, and seven years in Germany talking to our German "sister"
battalion people with Mercedes and VW wagons, and they said that they never
understood how the US Army could do what they did with "The Jeep." and most
off-road magazines don't show the Mercedes or VW doing all that well.
Bottom line. I have 115,000 miles on my 1999 Jeep Grand Cherokee, and will
keep it for as long as I can, and then I'm looking at Hondas, whatever.
news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>I have driven the 05 Grand off road and know exacly what you are
> talking about.
> The transmisssion is a Mercedes triptronic unit and isn't usually used
> with such a low ratio. This means it shifts fast and harder than you
> might expect when in low As you no doubt have found by now the jump
> between 1st and 2 nd is quite big.
> The best thing I found was to run in 2nd and 3rd most of the time and
> when 1st was needed come to a complete stop before or as I down shifted
> into 1st.
>
> Hope this helps
> John
I did not think that I had anything to contribute, but seeing Mr. Muddy's
info i guess i do...
Wife and I own twin 1999 Jeep Grand Cherokees. What we have done on trips
is rent the same car that we would think of buying and so last month, in
Dallas, we rented a 2005 Jeep Grand Cherokee. We were very underwhelmed.
Especially with the Tiptronic transmission. Leaving it alone, in D, it
revved, then lugged, then when I put more push on the accelerator, it
downshifted and revved like hell, then upshifted, and hit a small wall, then
slowly deaccelerated, until It down shifted again. We had this turkey for a
week and I figured out that the engine and the transmission are strangers to
each other. So I figured out how to start it up, and it's in D, and I flip
it left, left, left, to downshift, until i get what i want, then flip it
right, then it gets up there then i flip it right, etc. I might as well be
driving a manual shift. It just takes too much attention. It is very
poorly designed.
And to top that off, all the nice amenities, like the rear of the steering
wheel switches, the monitor in the ceiling - all gone. Maybe we rented the
cheap model, but I sure didn't think so.
I got my Consumer Reports (they don't know anything about cars, remembering
that in 1964 they thought that the Nash Rambler was the best car) but they
voted the 2005 Jeep Grand Cherokee the worst SUV (whatever that is) that
they tested.
So the Germans are now putting transmissions in US Jeeps? History has shown
that the Germans have never understood Jeeps, and I spent 26 years in the US
Army in Jeeps, and seven years in Germany talking to our German "sister"
battalion people with Mercedes and VW wagons, and they said that they never
understood how the US Army could do what they did with "The Jeep." and most
off-road magazines don't show the Mercedes or VW doing all that well.
Bottom line. I have 115,000 miles on my 1999 Jeep Grand Cherokee, and will
keep it for as long as I can, and then I'm looking at Hondas, whatever.
#82
Guest
Posts: n/a
Re: First automatic
"Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>I have driven the 05 Grand off road and know exacly what you are
> talking about.
> The transmisssion is a Mercedes triptronic unit and isn't usually used
> with such a low ratio. This means it shifts fast and harder than you
> might expect when in low As you no doubt have found by now the jump
> between 1st and 2 nd is quite big.
> The best thing I found was to run in 2nd and 3rd most of the time and
> when 1st was needed come to a complete stop before or as I down shifted
> into 1st.
>
> Hope this helps
> John
I did not think that I had anything to contribute, but seeing Mr. Muddy's
info i guess i do...
Wife and I own twin 1999 Jeep Grand Cherokees. What we have done on trips
is rent the same car that we would think of buying and so last month, in
Dallas, we rented a 2005 Jeep Grand Cherokee. We were very underwhelmed.
Especially with the Tiptronic transmission. Leaving it alone, in D, it
revved, then lugged, then when I put more push on the accelerator, it
downshifted and revved like hell, then upshifted, and hit a small wall, then
slowly deaccelerated, until It down shifted again. We had this turkey for a
week and I figured out that the engine and the transmission are strangers to
each other. So I figured out how to start it up, and it's in D, and I flip
it left, left, left, to downshift, until i get what i want, then flip it
right, then it gets up there then i flip it right, etc. I might as well be
driving a manual shift. It just takes too much attention. It is very
poorly designed.
And to top that off, all the nice amenities, like the rear of the steering
wheel switches, the monitor in the ceiling - all gone. Maybe we rented the
cheap model, but I sure didn't think so.
I got my Consumer Reports (they don't know anything about cars, remembering
that in 1964 they thought that the Nash Rambler was the best car) but they
voted the 2005 Jeep Grand Cherokee the worst SUV (whatever that is) that
they tested.
So the Germans are now putting transmissions in US Jeeps? History has shown
that the Germans have never understood Jeeps, and I spent 26 years in the US
Army in Jeeps, and seven years in Germany talking to our German "sister"
battalion people with Mercedes and VW wagons, and they said that they never
understood how the US Army could do what they did with "The Jeep." and most
off-road magazines don't show the Mercedes or VW doing all that well.
Bottom line. I have 115,000 miles on my 1999 Jeep Grand Cherokee, and will
keep it for as long as I can, and then I'm looking at Hondas, whatever.
news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>I have driven the 05 Grand off road and know exacly what you are
> talking about.
> The transmisssion is a Mercedes triptronic unit and isn't usually used
> with such a low ratio. This means it shifts fast and harder than you
> might expect when in low As you no doubt have found by now the jump
> between 1st and 2 nd is quite big.
> The best thing I found was to run in 2nd and 3rd most of the time and
> when 1st was needed come to a complete stop before or as I down shifted
> into 1st.
>
> Hope this helps
> John
I did not think that I had anything to contribute, but seeing Mr. Muddy's
info i guess i do...
Wife and I own twin 1999 Jeep Grand Cherokees. What we have done on trips
is rent the same car that we would think of buying and so last month, in
Dallas, we rented a 2005 Jeep Grand Cherokee. We were very underwhelmed.
Especially with the Tiptronic transmission. Leaving it alone, in D, it
revved, then lugged, then when I put more push on the accelerator, it
downshifted and revved like hell, then upshifted, and hit a small wall, then
slowly deaccelerated, until It down shifted again. We had this turkey for a
week and I figured out that the engine and the transmission are strangers to
each other. So I figured out how to start it up, and it's in D, and I flip
it left, left, left, to downshift, until i get what i want, then flip it
right, then it gets up there then i flip it right, etc. I might as well be
driving a manual shift. It just takes too much attention. It is very
poorly designed.
And to top that off, all the nice amenities, like the rear of the steering
wheel switches, the monitor in the ceiling - all gone. Maybe we rented the
cheap model, but I sure didn't think so.
I got my Consumer Reports (they don't know anything about cars, remembering
that in 1964 they thought that the Nash Rambler was the best car) but they
voted the 2005 Jeep Grand Cherokee the worst SUV (whatever that is) that
they tested.
So the Germans are now putting transmissions in US Jeeps? History has shown
that the Germans have never understood Jeeps, and I spent 26 years in the US
Army in Jeeps, and seven years in Germany talking to our German "sister"
battalion people with Mercedes and VW wagons, and they said that they never
understood how the US Army could do what they did with "The Jeep." and most
off-road magazines don't show the Mercedes or VW doing all that well.
Bottom line. I have 115,000 miles on my 1999 Jeep Grand Cherokee, and will
keep it for as long as I can, and then I'm looking at Hondas, whatever.
#83
Guest
Posts: n/a
Re: First automatic
Billzz wrote:
> "
>
>
>. I might as well be
> driving a manual shift.
>
> And to top that off, all the nice amenities, like the rear of the steering
> wheel switches, the monitor in the ceiling - all gone. Maybe we rented the
> cheap model, but I sure didn't think so.
Talk about different strokes for different folks! I loved the
transmission because you COULD shift it like a standard.
However I have driven several different 05 Grands and the high range
auto shift was seamless. It seems that the rental you pickup was
suffering as rentals so often do. Also if it had no interior goodies
then it was the bottom line "rental" special version.
John
#84
Guest
Posts: n/a
Re: First automatic
Billzz wrote:
> "
>
>
>. I might as well be
> driving a manual shift.
>
> And to top that off, all the nice amenities, like the rear of the steering
> wheel switches, the monitor in the ceiling - all gone. Maybe we rented the
> cheap model, but I sure didn't think so.
Talk about different strokes for different folks! I loved the
transmission because you COULD shift it like a standard.
However I have driven several different 05 Grands and the high range
auto shift was seamless. It seems that the rental you pickup was
suffering as rentals so often do. Also if it had no interior goodies
then it was the bottom line "rental" special version.
John
#85
Guest
Posts: n/a
Re: First automatic
Billzz wrote:
> "
>
>
>. I might as well be
> driving a manual shift.
>
> And to top that off, all the nice amenities, like the rear of the steering
> wheel switches, the monitor in the ceiling - all gone. Maybe we rented the
> cheap model, but I sure didn't think so.
Talk about different strokes for different folks! I loved the
transmission because you COULD shift it like a standard.
However I have driven several different 05 Grands and the high range
auto shift was seamless. It seems that the rental you pickup was
suffering as rentals so often do. Also if it had no interior goodies
then it was the bottom line "rental" special version.
John
#86
Guest
Posts: n/a
Re: First automatic
Well folks.....
My 5 speed kinda acts the same when I am in 4 low and hit the granny
gear or 1st. If I am moving and shift down into 1st which is very
seldom, I warn the passenger to hang on so they don't go through the
windshield.
I run 33" tires with 3.31 gears and my 1st gear is too low for any
practical purposes besides a start pointing up a cliff or tree. When
trail running, it basically never gets used.
I also figure I almost always only use it from a dead stop because when
I do use it, my CJ feels like I am going to break something if I hit 1st
low when moving or it will start bucking really bad. Body slams
forward, down goes gas pedal, body slams back up comes gas pedal then
body slams forward again....
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!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)
Fred Klingener wrote:
>
> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
> > I have driven the 05 Grand off road and know exacly what you are
> > talking about.
> > The transmisssion is a Mercedes triptronic unit and isn't usually used
> > with such a low ratio. This means it shifts fast and harder than you
> > might expect when in low As you no doubt have found by now the jump
> > between 1st and 2 nd is quite big.
> > The best thing I found was to run in 2nd and 3rd most of the time and
> > when 1st was needed come to a complete stop before or as I down shifted
> > into 1st.
>
> John,
>
> Thanks for the info and the analysis.
>
> I think your advice about coming to a stop before shifting to 1 is the most
> sensible procedure too. I think I can make that a habit.
>
> Thanks,
> Fred
My 5 speed kinda acts the same when I am in 4 low and hit the granny
gear or 1st. If I am moving and shift down into 1st which is very
seldom, I warn the passenger to hang on so they don't go through the
windshield.
I run 33" tires with 3.31 gears and my 1st gear is too low for any
practical purposes besides a start pointing up a cliff or tree. When
trail running, it basically never gets used.
I also figure I almost always only use it from a dead stop because when
I do use it, my CJ feels like I am going to break something if I hit 1st
low when moving or it will start bucking really bad. Body slams
forward, down goes gas pedal, body slams back up comes gas pedal then
body slams forward again....
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!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)
Fred Klingener wrote:
>
> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
> > I have driven the 05 Grand off road and know exacly what you are
> > talking about.
> > The transmisssion is a Mercedes triptronic unit and isn't usually used
> > with such a low ratio. This means it shifts fast and harder than you
> > might expect when in low As you no doubt have found by now the jump
> > between 1st and 2 nd is quite big.
> > The best thing I found was to run in 2nd and 3rd most of the time and
> > when 1st was needed come to a complete stop before or as I down shifted
> > into 1st.
>
> John,
>
> Thanks for the info and the analysis.
>
> I think your advice about coming to a stop before shifting to 1 is the most
> sensible procedure too. I think I can make that a habit.
>
> Thanks,
> Fred
#87
Guest
Posts: n/a
Re: First automatic
Well folks.....
My 5 speed kinda acts the same when I am in 4 low and hit the granny
gear or 1st. If I am moving and shift down into 1st which is very
seldom, I warn the passenger to hang on so they don't go through the
windshield.
I run 33" tires with 3.31 gears and my 1st gear is too low for any
practical purposes besides a start pointing up a cliff or tree. When
trail running, it basically never gets used.
I also figure I almost always only use it from a dead stop because when
I do use it, my CJ feels like I am going to break something if I hit 1st
low when moving or it will start bucking really bad. Body slams
forward, down goes gas pedal, body slams back up comes gas pedal then
body slams forward again....
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!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)
Fred Klingener wrote:
>
> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
> > I have driven the 05 Grand off road and know exacly what you are
> > talking about.
> > The transmisssion is a Mercedes triptronic unit and isn't usually used
> > with such a low ratio. This means it shifts fast and harder than you
> > might expect when in low As you no doubt have found by now the jump
> > between 1st and 2 nd is quite big.
> > The best thing I found was to run in 2nd and 3rd most of the time and
> > when 1st was needed come to a complete stop before or as I down shifted
> > into 1st.
>
> John,
>
> Thanks for the info and the analysis.
>
> I think your advice about coming to a stop before shifting to 1 is the most
> sensible procedure too. I think I can make that a habit.
>
> Thanks,
> Fred
My 5 speed kinda acts the same when I am in 4 low and hit the granny
gear or 1st. If I am moving and shift down into 1st which is very
seldom, I warn the passenger to hang on so they don't go through the
windshield.
I run 33" tires with 3.31 gears and my 1st gear is too low for any
practical purposes besides a start pointing up a cliff or tree. When
trail running, it basically never gets used.
I also figure I almost always only use it from a dead stop because when
I do use it, my CJ feels like I am going to break something if I hit 1st
low when moving or it will start bucking really bad. Body slams
forward, down goes gas pedal, body slams back up comes gas pedal then
body slams forward again....
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!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)
Fred Klingener wrote:
>
> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
> > I have driven the 05 Grand off road and know exacly what you are
> > talking about.
> > The transmisssion is a Mercedes triptronic unit and isn't usually used
> > with such a low ratio. This means it shifts fast and harder than you
> > might expect when in low As you no doubt have found by now the jump
> > between 1st and 2 nd is quite big.
> > The best thing I found was to run in 2nd and 3rd most of the time and
> > when 1st was needed come to a complete stop before or as I down shifted
> > into 1st.
>
> John,
>
> Thanks for the info and the analysis.
>
> I think your advice about coming to a stop before shifting to 1 is the most
> sensible procedure too. I think I can make that a habit.
>
> Thanks,
> Fred
#88
Guest
Posts: n/a
Re: First automatic
Well folks.....
My 5 speed kinda acts the same when I am in 4 low and hit the granny
gear or 1st. If I am moving and shift down into 1st which is very
seldom, I warn the passenger to hang on so they don't go through the
windshield.
I run 33" tires with 3.31 gears and my 1st gear is too low for any
practical purposes besides a start pointing up a cliff or tree. When
trail running, it basically never gets used.
I also figure I almost always only use it from a dead stop because when
I do use it, my CJ feels like I am going to break something if I hit 1st
low when moving or it will start bucking really bad. Body slams
forward, down goes gas pedal, body slams back up comes gas pedal then
body slams forward again....
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!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)
Fred Klingener wrote:
>
> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
> > I have driven the 05 Grand off road and know exacly what you are
> > talking about.
> > The transmisssion is a Mercedes triptronic unit and isn't usually used
> > with such a low ratio. This means it shifts fast and harder than you
> > might expect when in low As you no doubt have found by now the jump
> > between 1st and 2 nd is quite big.
> > The best thing I found was to run in 2nd and 3rd most of the time and
> > when 1st was needed come to a complete stop before or as I down shifted
> > into 1st.
>
> John,
>
> Thanks for the info and the analysis.
>
> I think your advice about coming to a stop before shifting to 1 is the most
> sensible procedure too. I think I can make that a habit.
>
> Thanks,
> Fred
My 5 speed kinda acts the same when I am in 4 low and hit the granny
gear or 1st. If I am moving and shift down into 1st which is very
seldom, I warn the passenger to hang on so they don't go through the
windshield.
I run 33" tires with 3.31 gears and my 1st gear is too low for any
practical purposes besides a start pointing up a cliff or tree. When
trail running, it basically never gets used.
I also figure I almost always only use it from a dead stop because when
I do use it, my CJ feels like I am going to break something if I hit 1st
low when moving or it will start bucking really bad. Body slams
forward, down goes gas pedal, body slams back up comes gas pedal then
body slams forward again....
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!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)
Fred Klingener wrote:
>
> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
> > I have driven the 05 Grand off road and know exacly what you are
> > talking about.
> > The transmisssion is a Mercedes triptronic unit and isn't usually used
> > with such a low ratio. This means it shifts fast and harder than you
> > might expect when in low As you no doubt have found by now the jump
> > between 1st and 2 nd is quite big.
> > The best thing I found was to run in 2nd and 3rd most of the time and
> > when 1st was needed come to a complete stop before or as I down shifted
> > into 1st.
>
> John,
>
> Thanks for the info and the analysis.
>
> I think your advice about coming to a stop before shifting to 1 is the most
> sensible procedure too. I think I can make that a habit.
>
> Thanks,
> Fred
#89
Guest
Posts: n/a
Re: First automatic
If you think about it your first gear ratio is about 3:1, your transfer case
is about 3 (2.71:1 but we will stick to whole numbers to keep the math
simple) and your rear end is 4:1.
Soooo 3 x 3 x 4 = 36:1 reduction.
Your engine is idling at 720 rpm (still keeping math simple) so your wheels
are turning at 20 rpm.
A 33 inch tire turns about 600 revolutions per mile
1 mile/600 rev x 20 rev/min = 1/30 mile/min x 60 min/hr / 60 min/hr = 2
miles/hr
Therefore at whatever speed you are going when you drop it into first gear
at an idle the engine, transmission, transfer case, and differential is
going to do its best to slow you to 2 mph (x 1.6 = 3.6 kph) as rapidly as
possible.
Why would you not expect a jolt?
As for Mike's driving habits...... just why does Mel allow you to drive?
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:436A1C5F.650301A7@sympatico.ca...
> Well folks.....
>
> My 5 speed kinda acts the same when I am in 4 low and hit the granny
> gear or 1st. If I am moving and shift down into 1st which is very
> seldom, I warn the passenger to hang on so they don't go through the
> windshield.
>
> I run 33" tires with 3.31 gears and my 1st gear is too low for any
> practical purposes besides a start pointing up a cliff or tree. When
> trail running, it basically never gets used.
>
> I also figure I almost always only use it from a dead stop because when
> I do use it, my CJ feels like I am going to break something if I hit 1st
> low when moving or it will start bucking really bad. Body slams
> forward, down goes gas pedal, body slams back up comes gas pedal then
> body slams forward again....
>
> 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!
> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
> (More Off Road album links at bottom of the view page)
>
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
is about 3 (2.71:1 but we will stick to whole numbers to keep the math
simple) and your rear end is 4:1.
Soooo 3 x 3 x 4 = 36:1 reduction.
Your engine is idling at 720 rpm (still keeping math simple) so your wheels
are turning at 20 rpm.
A 33 inch tire turns about 600 revolutions per mile
1 mile/600 rev x 20 rev/min = 1/30 mile/min x 60 min/hr / 60 min/hr = 2
miles/hr
Therefore at whatever speed you are going when you drop it into first gear
at an idle the engine, transmission, transfer case, and differential is
going to do its best to slow you to 2 mph (x 1.6 = 3.6 kph) as rapidly as
possible.
Why would you not expect a jolt?
As for Mike's driving habits...... just why does Mel allow you to drive?
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:436A1C5F.650301A7@sympatico.ca...
> Well folks.....
>
> My 5 speed kinda acts the same when I am in 4 low and hit the granny
> gear or 1st. If I am moving and shift down into 1st which is very
> seldom, I warn the passenger to hang on so they don't go through the
> windshield.
>
> I run 33" tires with 3.31 gears and my 1st gear is too low for any
> practical purposes besides a start pointing up a cliff or tree. When
> trail running, it basically never gets used.
>
> I also figure I almost always only use it from a dead stop because when
> I do use it, my CJ feels like I am going to break something if I hit 1st
> low when moving or it will start bucking really bad. Body slams
> forward, down goes gas pedal, body slams back up comes gas pedal then
> body slams forward again....
>
> 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!
> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
> (More Off Road album links at bottom of the view page)
>
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
#90
Guest
Posts: n/a
Re: First automatic
If you think about it your first gear ratio is about 3:1, your transfer case
is about 3 (2.71:1 but we will stick to whole numbers to keep the math
simple) and your rear end is 4:1.
Soooo 3 x 3 x 4 = 36:1 reduction.
Your engine is idling at 720 rpm (still keeping math simple) so your wheels
are turning at 20 rpm.
A 33 inch tire turns about 600 revolutions per mile
1 mile/600 rev x 20 rev/min = 1/30 mile/min x 60 min/hr / 60 min/hr = 2
miles/hr
Therefore at whatever speed you are going when you drop it into first gear
at an idle the engine, transmission, transfer case, and differential is
going to do its best to slow you to 2 mph (x 1.6 = 3.6 kph) as rapidly as
possible.
Why would you not expect a jolt?
As for Mike's driving habits...... just why does Mel allow you to drive?
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:436A1C5F.650301A7@sympatico.ca...
> Well folks.....
>
> My 5 speed kinda acts the same when I am in 4 low and hit the granny
> gear or 1st. If I am moving and shift down into 1st which is very
> seldom, I warn the passenger to hang on so they don't go through the
> windshield.
>
> I run 33" tires with 3.31 gears and my 1st gear is too low for any
> practical purposes besides a start pointing up a cliff or tree. When
> trail running, it basically never gets used.
>
> I also figure I almost always only use it from a dead stop because when
> I do use it, my CJ feels like I am going to break something if I hit 1st
> low when moving or it will start bucking really bad. Body slams
> forward, down goes gas pedal, body slams back up comes gas pedal then
> body slams forward again....
>
> 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!
> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
> (More Off Road album links at bottom of the view page)
>
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred
is about 3 (2.71:1 but we will stick to whole numbers to keep the math
simple) and your rear end is 4:1.
Soooo 3 x 3 x 4 = 36:1 reduction.
Your engine is idling at 720 rpm (still keeping math simple) so your wheels
are turning at 20 rpm.
A 33 inch tire turns about 600 revolutions per mile
1 mile/600 rev x 20 rev/min = 1/30 mile/min x 60 min/hr / 60 min/hr = 2
miles/hr
Therefore at whatever speed you are going when you drop it into first gear
at an idle the engine, transmission, transfer case, and differential is
going to do its best to slow you to 2 mph (x 1.6 = 3.6 kph) as rapidly as
possible.
Why would you not expect a jolt?
As for Mike's driving habits...... just why does Mel allow you to drive?
--
Billy_Ray@SPAM.fuse.net (remove SPAM)
2002 Jeep WJ 4 Liter Automatic
Sharing is why we are all here....... or should be.
..
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:436A1C5F.650301A7@sympatico.ca...
> Well folks.....
>
> My 5 speed kinda acts the same when I am in 4 low and hit the granny
> gear or 1st. If I am moving and shift down into 1st which is very
> seldom, I warn the passenger to hang on so they don't go through the
> windshield.
>
> I run 33" tires with 3.31 gears and my 1st gear is too low for any
> practical purposes besides a start pointing up a cliff or tree. When
> trail running, it basically never gets used.
>
> I also figure I almost always only use it from a dead stop because when
> I do use it, my CJ feels like I am going to break something if I hit 1st
> low when moving or it will start bucking really bad. Body slams
> forward, down goes gas pedal, body slams back up comes gas pedal then
> body slams forward again....
>
> 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!
> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
> (More Off Road album links at bottom of the view page)
>
> Fred Klingener wrote:
>>
>> "Mr Muddy" <muddy@mrmuddy.freeyellow.com> wrote in message
>> news:1130977539.602437.315770@g14g2000cwa.googlegr oups.com...
>> > I have driven the 05 Grand off road and know exacly what you are
>> > talking about.
>> > The transmisssion is a Mercedes triptronic unit and isn't usually used
>> > with such a low ratio. This means it shifts fast and harder than you
>> > might expect when in low As you no doubt have found by now the jump
>> > between 1st and 2 nd is quite big.
>> > The best thing I found was to run in 2nd and 3rd most of the time and
>> > when 1st was needed come to a complete stop before or as I down shifted
>> > into 1st.
>>
>> John,
>>
>> Thanks for the info and the analysis.
>>
>> I think your advice about coming to a stop before shifting to 1 is the
>> most
>> sensible procedure too. I think I can make that a habit.
>>
>> Thanks,
>> Fred