Regear
 

So now that I run the 33s i need to regear, ha! Getting ready to take out my rear 8.25 to change gears, been anticipating this for awhile!

im taking mine for 4.88's and a front elocker on the 30th.
im super excited to

wish i had 4.56s in mine, but my 410 axles only cost me what ive put into the rear disk conversion

I just swapped in my rear D44 today with 4.88s. Its pretty awesome even though I've only driven it like a granny since I'm breaking in the ring and pinion

how is it with 33's?
i dont care about "high" rpm @ 65 (3000) because i have to put mine in 3rd and it runs at 3000 anyways or else it overheats the trans

how much difference did it make?

If your going to do any HD off roading go with a 4.56 gear they are much stronger than the small pinion 4.88's most of all with a 33" tire where a 4.56 is the correct gear.


I'm now running 2 different sets of tires and rims one set 33's on Soft Eights and the other a set of re-grooved 35's on Beadlocks. Only a few times that I wish for a 4.88 gear and those were getting fewer and fewer as I learned to drive on the 35's with 8 psi. Overall I'm very happy now with the 4.56's and Detroit lockers, you might want to think more about this, and do your lockers when you do the gears same labor and time.

after a month or so of heavy contemplation I decided to go in 4.10 since the largest I plan to run are 33s. Plus I run a d30 lp in the front right now and I can acquire a d30 hp in 4.10 and swap it in fairly easily. Once thats built I want to experience wheeling it "properly" geared before i throw a locker in it. I'll probably do a lockright locker in the rear. Going deeper gearing ill save for when i get stronger axles and e lockers front and rear

I might add the Lock right Locker doesnt require removal of the carrier so install seems pretty straight forward later on

With 35's at 4.56 you can make it up, over and through a LOT of stuff with skilled driving. I routinely wheel with a bunch of locked rubicon's on 37's, they pick poor lines and try to muscle through stuff. I pick good lines, and RARELY need to get pulled through something. The key is learning how to drive your rig unlocked. All the locked guys like to hit ledges with both wheels at the same time, unlocked you won't get up it, you gotta' hit it one wheel at a time (unless you wanna' bounce it. I have a deep seated aversion to breaking $tuff!).

I also contemplated going 4.88 as I am about to lock both axles and swap the front to an HP, but opted to stay at 4.56 for the larger pinion size/strength.

Just be glad you didn't start out with 3.07s....

lol indeed. I started out with 3.07's and swapped in a set of 3.55's from automatic cherokee and run 31"s on it, fantastical combination, love it. Plenty of power and still save more gas.

i don't do nasty hard core wheeling, but i think i will appreciate more low considering my location and how my jeep is set up.
and most everyone who wheels a xj here always regrets 4.56's.
i already ordered the 4.88's after months of thinking and comparing (and saving)
i also ordered a e locker and i have a rear detroit installed (8.25) so it stays.
Taking it to the shop in 3 days for the install.

You may consider running a 4.1 transfer case instead of re-gearing it again would be double in cost for the parts but then you would have street gears and also trail gears, unless you plan on going higher than 33"s. That is what was in my son-in laws Rubicon and that is super low for about little over a Grand to up-grade your transfer case.

well a tcase upgrade is scheduled in the future for sure

Ive got revolution gear and axle ring and pinion in 4.11 for an 8.25 and the master install, I also have a serious offroad 1 ton steering utk kit and I'm picking up a HP d30 in 4.10 hopefully this weekend. I might also try and cut out my rear fenders and weld sheet metal back in for larger wheel wells and flex room. I graduate high school tomorrow night and then I can finally start the install

Are you going to have someone install your gears? I am waiting to re-gear because when I do I would like to put in selectable front lockers. I would love to go with 4.10s but then I would have to re-gear the 8.8 I have. It has 3.73 gears and I don't think there will be that much diff between 4.10s and 3.73s. Money plays a huge roll when it comes to up-grading things. I would like good highway gearing, that is why I am considering the Tera transfer case up-grade, That alone would put me where I would like to be on the trail.

I plan on regearing my rear 8.25 by myself considering you dont have to deal with carrier shims like danas, also i know a couple people who have experience with diff regears. Plus i wont have to screw around with a front regear since im just gunna get a high pinion d30 in 4.10 already to replace my low pinion

Sounds like a good plan, Went wheeling last Sunday. Had a pretty good time. There is a good size rock slab that we went down but on the way back up it started raining and with mine being a 5spd it would have been nice if I had lockers. My friend had no issues as once he got up onto the slab his tranny was able to keep him moving. My wheels just spun in the lowest gear, so I ended up winching up. I really can't wait to do gearing and lockers some day.

well let me tell you gears are a fun time! More or less sarcasm but my rear axle is out and on saw horses with the diff open, gunna take the carrier out tomorrow get on to the bearings and pinion and backlash and all that great jazz, ha!

Good choice on the 4.11 with 33s.

I have 4.56 on 33s and it is a bit too much, especially on the street. They will work much better when I put on the 35" Duratracs.

Thank you! most people tell ya that you need 4.56 on 33s but I don't plan to run larger tires on these axles anyway, plus with 4.10 you don't have to get a different ring carrier or grind teeth down to fit the center pin!

So I got the new ring on the carrier today but had to stop for my family graduation party, its finally over and I can get back to work! Also I got a new head unit and a snorkel kit as gifts, f*** yeah! On top of that I made a deposit for my front axle today and im getting it monday, then I can drill the knuckles for the 1 ton utk I have and get it on the jeep, so far going smoothly! Apparently months of research helps a bit

That is the very first time in over 4 yrs of reading post's here and on other sites that anyone has said that about 4.10 gears with 33's and 35's even a better choice with them.


Under gearing sucks I know been there with 31 and 33" tires with 3.55 gears they both sucked and mpg was poor along with power and constant up/down shifting with an AW4 along with trans overheating. All this because of gears period when I switched to the 4.56's with 33's the first full tank of gas I gained 5 mpg with my heavy XJ. Recently bought another set of rims beadlocks and tires 35" (used that I re-grooved) very heavy lugs and sidewall. With those 35's I lost about 2.5 mpg than the 33's now go figure.


Your XJ must be exceptional when it comes to tires and gears knowing its not a 2wd DD with max mileage in mind, or is it?

3.73 and up requires a different carrier in a D30, what made you think that?

Ha, 1st time in 4 years, but no one has had the additional torque of the superchargers like I use.

I've have a bunch of combinations. I have 4 different XJs.

3.55 AW4- 28", 31", now 32" Supercharged with +100rwtq, great on street and offroad, good cruise freeway 65-70mph, use Lo range as needed

3.55 AW4- 28", now 25" 2WD supercharged with +70rwtq, smaller tires incr ratio ro about 4.10, perfect street racing and autocrossing, 'buzzes' a bit at speed 65-70mph

3.73 5speed- 31", now 28" 85hp Diesel, much better with smaller tires, both cruise and acceleration

4.56 AW4-33" MTRs, bolt on engine upgrades power to about 4000 rpm, too low ratio for street, buzzes at speed 65-70mph, OK offroad, use Lo when needed, needs more power, supercharging soon.

Everyone seems to prefer gearing a bit lower than stock. I think Jeep did a great job with the choice of 3.55 and 28" tires. I try to stay as close to that overall ratio or even a bit to the low side (less gear) for the auto AW4 and more street DD 90% street, 10% offroad. If I did more offroad, I would gear to the other side of stock overall ratio.
What the Jeeps really need is more power and torque. Adding the supercharger and more torque really makes the higher overall ratio work well. I prefer to slightly 'under gear' for my appliucations.

Remember that most tires are over rated for their size/diameter. Most are NOT true sizes. 35's are really 34.5-34.7" when new and can be 33" with use and wear. Same for 33's, 32's, 28's.
I gear for my true tire size/diameter and not what I think they are.

in an 8.25 I meant

This is my friend's "extreme clearancing". He currently has 33s on 1" of lift, now there is plenty of room for 35s.
https://www.cherokeeforum.com/attach...1&d=1434608574

Going to 4.88 with 33s from stock 3.55s, I went from 9mpg to 16 ish.

Hmmm My 2000 has 4.56 32" 11.5 Goodyear MTR's AW4 c8.25 29spline and it does good on the street, real peppy and HWY speeds and RPMs are fine I went 4.56 so when I get my 33" Im ready.
Here is a Vid I did a while back

DumaJones; Thanks for posting the video. I'm pretty impressed. I wonder if 4.56 gears would be best for my 5spd?

What size tires?

Yours is a manual(manual and auto two different cookies) if so I'm sure you have 3.07 gears as stock, so 3.73 is good for 32" 4.10 is good for 33" I think 4.56 for 35"


For autos 3.73 for 31", 4.10 for 32", 4.56 for 33"

Right now I am running 3.55 gears from an auto XJ swapped them in about a year ago. They are OK for 31" tires. (not ideal) Just gathering Intel for the future.