mr white

Nope. I have a 5spd. I need to get a gear eventually I guess but i calculated the mileage using a known distance on a road trip doing approximately 70-75 the whole way.

djcherokee

4.88s and 35s here. Love it both on and off road.

Fred/N0AZZ

33's and a 4.56, only wish I had gone with 4.88's now.

unidentifiedbomb

If you do lots of highway driving then go 4.56, if it's mostly trails then go 4.88. That's basically what has made my mind between 4.10 and 4.56 gearing when I go to 33s.

aka"dude"

Thanks for the input Fred, what makes you feel like you would enjoy the 4.88's. Were do you feel the 4.56's are lacking also how is she doing on fuel MPG wise?

t_long

http://www.naxja.org/forum/showthread.php?t=1050369

I just stumbled upon this thread and couldn't help but share it with you.

Outlaw Star

OTD/NTD x CGR = EGR
OTD: Old Tire Diameter (stock in inches)
NTD: New Tire Diameter (in inches)
CGR: Current Gear Ratio
EGR: Effective Gear Ratio (what the Jeep acts like it has.

IE: 27/33 x 3.55 = 2.90:1 Your Jeep performs like it has 2.90's instead of 3.55's w/the larger tires

Now, let's say you regear to 4.56's
27/33 x 4.56 = 3.73:1 Your Jeep now acts like a stock Jeep with the Towing Package (towing package was equipped with 3.73's instead of 3.55's)

The point is to plug in a gear ratio into the CGR slot until your EGR is as close to stock gear ratio as possible. This will give you a good compromise of power and economy. This formula works for both Automatic and Manual transmissions unlike the charts which ONLY cover manual transmissions.

XJmember

Or use this website, its easier.

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

Outlaw Star

Already did the math for him. Lol. Seriously, 4.56 if you drive on the street more than off road, 4.88 if you off road a lot.

caronaxtr

I'm at 4.56 on 35's. When I was on 33's it was nice. Now that I'm on 35's I really should have gone with 4.88's. Live & learn. On hills & towing the 4.88's would be a much nicer for me. My XJ is a toy only so not too concerned with DD behavior.

ehall

4.88 is getting thin on the ring gear, yes? something to consider, if you are wanting 4.88 that bad, maybe you should get another axle

aka"dude"

thanks so much for the info guys and keep it coming. Like everybody else I wish there was a happy medium between having some extra nut for towing and getting my 15 16MPG back with the bigger tires. I almost never need to run the highway but I do drive it every day so Im still kind of torn. WHo came up with these gear sets anyway I want 4.68 or 4.72s

Outlaw Star

I had 3.31:1 in my 85 Xj

mr white

No the pinion is small.

wrapstar

[QUOTE="ehall;3013335"]4.88 is getting thin on the ring gear, yes? something to consider, if you are wanting 4.88 that bad, maybe you should get another

Please don't misinform people if you have no personal experiences. Also i have new 35" mtz's with 4.88s and the last 2 tanks averaged 19 mpg near tampa driving 80 miles a day.