Eracer76

Just wondering... do you have 4.88's and your suggestion is based off of experience, or just a guess?


I do a lot of highway driving and Im glad I went 5.13's with an auto on 35" tires.
Even still, if I run up a hill into a head wind, it has to down shift to maintain 70mph, so 4.88's would be worse IMO.
My gas mileage is the same or better then it was with 4.10's, plus I have more power, so thats not an issue

Sotally Tober

It seems not one person with 5.13s wished they had taller gears. I know I will never go to 37's, so 4.88s are a possibility. Not to much highway driving though. Just dont want to go to low. I still have the winter wheel thing to figure out. Didn't want to buy to sets of 35's, but with regearing I might have to.

Ronson

My gas mileage got better about 4 MPG better

Rugbyduck

I can't imagine going anything but 5.13's. It's still anemic for my taste but I can live with it.

Ge99ne

Rubicon ='s 4.10's

It should help with any of the ratio's if youre already running 35's or bigger. It lets the engine & tranny work together again.

Engine553

That sells me right there!

I have the 3.73's right now and It's such a pig. I'm getting 35's next week and I know I will have to re-gear to be satisfied with the tire swap.

Ragin Gage

I did 5.13s with a stick and 35s. No regrets. You'll crawl better and just have better oomph and less downshifting. 6th gear actually has a reason for being. The rpms do run higher, but the motor is in its power band b/t 2500-3500 anyways. And if you do lots of 40-50 mph city driving, you can sip gas in 6th gear.

StevieRay

Yes they are, that's why I went with the 4.88's. Mine runs great, I don't need to drive it like a sports car, a Jeep is not meant for that in my opinion.

Engine553

Is the tendency to break a 5.13 over a 4.88 due to heavy off-road use or just because of the shaft diameter? Where I drive it's mostly sand, although not as demanding as mud or rock it still places a strain on the driveline. It would seem to me that if you purchase a high quality product a 5.13 'should be' as reliable as a 4.88, no?

StevieRay

The problem is that there is not as much metal on the pinion of a higher gear ratio. If you are only doing light offroading, it probably won't be a problem. A friend of mine in Colorado tweaked his setup with some pretty heavy rock crawling with the 5.13 gearing setup. I didn't want that headache, so I went with the lower gearing.

For my situation, the 4.88's put my Jeep back at the stock performance with the 35's which is fine with me.