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-   -   4.56s or 4.88s ? (https://www.cherokeeforum.com/f2/4-56s-4-88s-29959/)

Ruttenit 11-27-2009 05:21 PM

Well to honest I am mainly looking for a great hwy gear with the 33s. It will be driven on the street ALOT. I am changing the gears in the tcase so it will be lower for crawling. I am after great power and gas mileage. I don't want to feel like its a workout to drive it 70-75 MPH .

What kind of mileage are you all getting with 33s

stickey 11-27-2009 10:26 PM

I'm on 33's lookin to regear, mostly street, prob. goin 4:56. but I want to hear what everyone says to

nick_n_ii 11-27-2009 10:28 PM

If you want gas mileage on 33's go with the 4.56's

RedBaron 11-27-2009 11:54 PM

On the 10'th or 12'th day God gave the Jeep 4:88's
 
I have a lo-per 4.0 A/T, 31" tires and the 4:88's give me a nice responsive Jeep. I get 16 mpg towing a 3500lb travel trailer. If gas milage was my holy grail I'd drive a Honda.

trapper 11-28-2009 12:09 AM

I am running 4.56s on 35s and wish I had done 4.88s.. I will likely go to 33s if I can not make it work right on the trail

ktmracer419 11-28-2009 09:49 AM


Originally Posted by Ruttenit (Post 341689)
Well to honest I am mainly looking for a great hwy gear with the 33s. It will be driven on the street ALOT. I am changing the gears in the tcase so it will be lower for crawling. I am after great power and gas mileage. I don't want to feel like its a workout to drive it 70-75 MPH .

What kind of mileage are you all getting with 33s

i often hear of people complaining about not having low enough gears

i never hear of people complaining about having too low gears.

friend of mine ran 5.13's with 31's 18 mpg at 65 mph

for an engine to run most efficiently you want to keep it in the power curve.

what sucks up milage is constantly changing gears for hills, slipping the torque converter, lugging the engine.


and dont ask me how i know, but...
at 97 mph im runnin 3600 rpms

xjbuddy 11-28-2009 09:56 AM

i got a 98' limited. so 4.56 or 4.88's. but i want good mpgs as well. so i figured 4.56????

ktmracer419 11-29-2009 08:20 AM


Originally Posted by ktmracer419 (Post 342220)
i often hear of people complaining about not having low enough gears

i never hear of people complaining about having too low gears.

friend of mine ran 5.13's with 31's 18 mpg at 65 mph

for an engine to run most efficiently you want to keep it in the power curve.

what sucks up milage is constantly changing gears for hills, slipping the torque converter, lugging the engine.


and dont ask me how i know, but...
at 97 mph im runnin 3600 rpms


Originally Posted by xjbuddy (Post 342225)
i got a 98' limited. so 4.56 or 4.88's. but i want good mpgs as well. so i figured 4.56????

.

SeriousOffroad 11-29-2009 08:28 AM

http://www.grimmjeeper.com/gears.html

93XJLI 11-29-2009 10:36 AM

GET 4.88

wish i did.

1990cherokee 11-29-2009 12:20 PM

i am running 4.88's in my dodge lifted 6 inchs with 37 inch tires, get okay MPG and i mainly did it to tow my jeep. I love the 4.88's and my truck is a daily driver

ktmracer419 11-29-2009 01:03 PM


Originally Posted by 1990cherokee (Post 343035)
i am running 4.88's in my dodge lifted 6 inchs with 37 inch tires, get okay MPG and i mainly did it to tow my jeep. I love the 4.88's and my truck is a daily driver

fullsize v8 dodge tow rig does not = midsize unibody xj

alpine.adrenaline 11-29-2009 02:04 PM

I have a stock 1987 4-speed transmission with a 4-cylinder TBI 2.5L engine pushing 31x9.5s, what gear ratio do I have and what ratio would be ideal for my engine on 33's?

93XJLI 11-29-2009 02:11 PM


Originally Posted by alpine.adrenaline (Post 343090)
I have a stock 1987 4-speed transmission with a 4-cylinder TBI 2.5L engine pushing 31x9.5s, what gear ratio do I have and what ratio would be ideal for my engine on 33's?

highest you can get is 4.88, so that. your stock gears are probably 4.10

SeriousOffroad 11-29-2009 02:28 PM


Originally Posted by alpine.adrenaline (Post 343090)
I have a stock 1987 4-speed transmission with a 4-cylinder TBI 2.5L engine pushing 31x9.5s, what gear ratio do I have and what ratio would be ideal for my engine on 33's?

Ahem......


Originally Posted by FrankZ (Post 342945)



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