206junglist

I am going to be running a 4.5 lift with 33-12.5 tires. What I want to know is if I should get 4.10 or 4.56. gears. This rig is my DD (91 4.0L 5speed) until I can afford to insure my Camaro. More then likely I will probably swap in a new rear axle at some point, and plan on putting it on 35's when its not my DD anymore (6 months-1year). I do tow alot with my rig 4,000 pound boat. I will be leaving for a 2,500 mile road trip in a month and will be having to do speeds of 80+ MPH on I-5.
So whats the best bang for my buck?
thank you

Abovetimberline

4.10 would be my choice,it will still be up there at 80mph.

COSXJFAN

At least 4.56 gear, PERIOD!! 4.56 will put you as close to stock as you can get with 33s. If you are planning 35s, then you need to go with 4.88s.

Abovetimberline

here is a site where you can do the calculations yourself,www.gimmjeeper.com.gears.html. You can add info and see what is good for you.

XJ Stryker

I agree with COS

4.56 or bust. Hell I am considering those for mine. And I am on 30's I just don't want to have to regear again when I do go to 33's

98 JeepJeep

4.56 for 33
4.88 for 35......make up your mind now.

ktmracer419

do the 4.88 especially with the towing

less wear on the rest of the drivetrain

im about to run 5.38's with 35's

everyone who tells you that your rpm's will be too high doesnt know what they are talking about.

mud-dog27

im going from 32s to 33s now that i have my F8.8 for my rear and everything ive looked into has said go 4.56 at least or ill be kickin myselfas 4.10 just wont cut it

broncofire75

4:10s cut it for me.

Sure I dont have much of a high gear in 4wd but I wheel rocks lol.

It does good for what it is but If I was going to buy all new stuff and what not id go with 4:88s on your 33s. Im going to go lower when i can afford it and thats what Ill go to. Unless I build 44s then its 5:13s.

mud-dog27

i still want a bit of highway driveability if it were more offroad i would go 4.88s and ive driven in cherokees with all 3 gear sets and the 4.56s seemed best with the 33s

206junglist

thanks I think that was helpful I think I am going to go with 4.56 for now.
Also is my speedo going to be off with the oversized tires and how do i fix that.

BuckB91XJ

With a Jeep 4.0 motor in an XJ you go with the following:

33 inch tires = 4.56 gears
35 inch tires = 4.88 gears

PERIOD END OF STORY!!!!!!!!

I speak from my own experience and what worked and gave the best MPG and performance. No guessing or giving my opinion here. I'm giving you my experience.

mud-dog27

with 3.55s and 32s my speedo oddly enough didnt change it was actually dead on

but by changing gears you will have to order a new spur gear for the speedo

01xj

Can anyone suggest a decent place to get a quality 4.56 gear?

01LimitedXJ

Randys ring and pinion
http://www.ringpinion.com/

Just Differentials
http://www.justdifferentials.com/

those are two that come to mind...also, 4wheelparts does price matching, you just have to bring in a printed out quote for the gears.