4.88's with 33's

Jeffro600 · Dec 12, 2005

Ive found a KILLER deal on a set of built axles for my XJ(AX-15, 4.0)....only thing is, they have 4.88's in them. This is not for a DD, but it does see a modest amount of time on the highways/roads between trails. Does anyone run 4.88s with 33s? Hows the mileage?

Kejtar · Dec 12, 2005

Jeffro600 said:
Ive found a KILLER deal on a set of built axles for my XJ(AX-15, 4.0)....only thing is, they have 4.88's in them. This is not for a DD, but it does see a modest amount of time on the highways/roads between trails. Does anyone run 4.88s with 33s? Hows the mileage?

I got 4.88's with 33's and my mileage fluctuates between 15 and 18 (the latter is on a really good day which is rare). If you don't haul too much crap (unlike me) and have no roof rack (got rid of mine) your mileage will be pretty good. Also right before I put 4.88's in my mileage wasn't the greatest either but I have never really bothered with it as it was not extremely bad so I figure if you're ahead of the game when you start you'll be ahead of the game after the swap as well.
Btw, AX15 and 33's and 4.88's rock both on road and off. Highway I can cruise up to 80mph fairly comfortably and on the trail in 4L it feels pretty nice too (although after you get spoiled with 4.88's you'll dream of a 4:1)

Jeffro600 · Dec 12, 2005

Kejtar said:
(although after you get spoiled with 4.88's you'll dream of a 4:1)

Dont worry....its on the "to-do" list! :laugh3:

old_man · Dec 12, 2005

Heck, Jeep had 4.56's with stock tires on some XJ's. You will be geared higher than that. I wouldn't necessarily drive it 4,000 miles to Moab with that gearing, but for everyday driving it will be fine.

Kejtar · Dec 12, 2005

old_man said:
I wouldn't necessarily drive it 4,000 miles to Moab with that gearing, but for everyday driving it will be fine.

And why not?

willyb · Dec 12, 2005

Jeff - I wil be running the same setup [4.88's/33's] when I lock/gear my axles... I've considered 4.56's, but living at the altitude we do, anlong with hills and wind we have 4.88's are the way to go IMO... This will also allow you to run larger tires down the road, and still have respectable performance... You say you won't go bigger - but you will... Trust me...

-Will

Jeffro600 · Dec 12, 2005

There is no doubt in my mind that i will EVENTUALLY go bigger....its only limited by my ever shrinking bank account!

jrsxj98 · Dec 12, 2005

Jeffro600 said:
There is no doubt in my mind that i will EVENTUALLY go bigger....its only limited by my ever shrinking bank account!

Then dont hesitate on the 4.88's, I ran the same setup for awhile before I got my 35's and really enjoyed the added zip off the line, and mine is a DD.

sidriptide · Dec 12, 2005

old_man said:
I wouldn't necessarily drive it 4,000 miles to Moab with that gearing,

don't say that tom! thats EXACTLY what i intend to do.

mack · Dec 12, 2005

i went 4.56's with my 33's, now i have 35's, i really wished i could have went 4.88's, but the 8.25 said nope...

BrettM · Dec 12, 2005

I have 4.88s, used to have 33s, and I got 20mpg if I kept it to about 65mph. the power and RPMs were great as fast as I could take it. 4.88s would definitely be my recmmendation.

Ramsey · Dec 12, 2005

mack said:
i went 4.56's with my 33's, now i have 35's, i really wished i could have went 4.88's, but the 8.25 said nope...

x2 damn pushy chrysler

Weasel · Dec 12, 2005

go for them if it's a good deal, if the rpm's are to high then drive slower.

Personaly I like my 4.56. I have really heavy 33's which measure a bit tall and I can pull 75-80mph up all the steep hills from Rapid City to home in Billings, MT. Yeah it may shift down a bit but I like the gearing.

karstic · Dec 12, 2005

I love mine. Plan to drive to CO next sumer with them. Loaded down with all kinds of crap, pulling a tent trailer, roof rack 10-13 mpg. Unloded keeping it to 60-65 mph, 13-16 mpg. In the process of replacing exhaust header and tune up , we'll see what happens then.

Kejtar · Dec 12, 2005

karstic said:
Unloded keeping it to 60-65 mph, 13-16 mpg. In the process of replacing exhaust header and tune up , we'll see what happens then.

You gotta loose that rack amongst other things. I think I got about 1mpg out of loosing mine. Otherwise then that, you should be getting better mileage: If I stick in the 60-65 range I do pretty damn good, but it's hard to resist myself on the open road

karstic · Dec 12, 2005

Kejtar said:
You gotta loose that rack amongst other things. I think I got about 1mpg out of loosing mine. Otherwise then that, you should be getting better mileage: If I stick in the 60-65 range I do pretty damn good, but it's hard to resist myself on the open road

Like I said I'm in the process of a much needed tune up. That should help.

Ramsey · Dec 12, 2005

yeah but a cracked exhaust manifold really hurts ya

karstic · Dec 12, 2005

Ramsey said:
yeah but a cracked exhaust manifold really hurts ya

Thats why mine is getting replaced, among other reasons.

bigwhitey · Dec 13, 2005

I've been running 4.88's and 33's for a year now on my daily driver and it's great. I still get 15 MPG just like the 31's with 3.55's. I drive 25 miles a day for work and 120 on the weekend for trips down the interstate.

Harvo · Dec 13, 2005

I had 4.11's with my 31's and it seemed to rev kind of hi at hiway speeds. I just put on some 33's and now it seems much more like stock. The speedo is even dead on according to the GPS. I'd say 4.56 would be fine... but 4.88's might be pushing it, unless you are going bigger soon.

4.88's with 33's

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