Shortleged1

So I picked up a 8.25 that has liberty disc brakes on it and 4.11 gears. I'm tearing the axle down because I want to put a truetrac in it and maybe 4.56 gears for 35s. Currently running 33s(on my jeep now on stock gears ) and this axle has 4.11 in it.

My current question(this might become my help me, i'm a noob thread) is, I have the carrier and gears out and have taken apart 1 side of the axle completely and I was looking at the pinion. It seems like it was put in correct, it doesn't have any play, spins with some resistance, it's used so the resistance is minimal. The teeth on the pinion look in really good condition, pretty much perfect.

If I stick with the 4.11 gears, can I leave this installed when I get the truetrac and gear ring mounted to it? It doesn't seem like I'd need to replace the pinion but just figured I'd ask the community for their experience. Thanks.

Shortleged1

I should also put that the axle is coated with bed liner and was painted. This is normally a cool idea for axle protection but there are chips and rust all over and I want to grind it down and recoat it with something simple and black before I start all the internals. So that is the reason for the complete tear down.

salad

Gear sets are comprised of a ring and pinion. It's not just the ring gear.

SeriousOffroad

At this point you need to stop what you're doing.
No offense intended, but it seems that until you've done a ton of research....you're not prepared for the work you're trying to do.

SeriousOffroad

This is a start...
http://www.pirate4x4.com/articles/te...sta/Gear_Setup

Shortleged1

Maybe I wasn't clear. I have the "ring gear" out, and everything else in the pumpkin... The pinion(http://imgur.com/H8rHKhu) that is in the pumpkin still is what I'm asking about.

> Gear sets are comprised of a ring and pinion. It's not just the ring gear.

No ****. Obviously I worded this very poorly. LSD using existing gears, good idea? I do not know what this guy did with this axle, it isn't bent, the ring and pinion are in good condition.

How about this. Do you guys reuse gears when doing rebuilds if they are fine or do you just get new gears? I will be bringing a lot of these parts to a shop to get things done that I cannot do. It doesn't take a veteran grease monkey to take something apart and document everything... so "At this point you need to stop what you're doing." this kind of **** doesn't help.

Shortleged1

I've read over that before, probably the most helpful read I've ever come across. But my question was pretty much use of old gears or buy new on rebuilds.

SeriousOffroad

Wait a minute.....
Go back a read your first post please.

After that you might want to pause and consider why you got the replies that were posted.

Shortleged1

I did, that is why I realized I worded it as poorly as possible.

Fred/N0AZZ

I can one of your questions very quickly and easy. YES change the gears to a 4.56 ratio that is the correct setup for a 33" tire and can be ran with a 35". I run both sizes on 2 sets of wheels on mine with 4.56's, my 35's are for off road only the 33's serve as both on and off road.


Your going to have and change gears in the front also so might as well do both with the correct gear. I bought my 4.56's from Rustys for my 8.25/D30 with both master install kits for under $500.


You can sell the 4.10's to someone running 31's on a 2wd XJ that correct for that tire.

Rogue4x4

So, if you're taking it somewhere, why not just have them do the work? They're gonna have to do it all again anyways, regardless of what you have or haven't done. How do you know the axle isn't bent? Did you paint the gears and get a pattern before you disassembled? Measure the preload on the pinion with a running torque wrench? There's a LOT involved when doing this type of work, and it certainly does take someone who KNOWS what they're doing, to do it correctly. The way your original post read, the advice given was valid. Lashing out at knowledgeable folks on the site for your **** poor wording isn't cool.

As far as re-using the gear set...yes it can be done, but, I'm a fan of replacement with known good parts, so personally I would NOT re-use a gearset. If you're planning on going bigger tires, now is the time to get a different gear set, and as mentioned, you'll need to do the front axle as well, unless you're 2wd. That said, if the old gearset is in decent shape, sell it, recoup some of your cost. If you decide to go with a new gearset, just stop what you're doing, take the axle to the shop, and let them take care of it. They need to do things like get the numbers off the current gearset, measure the shim packs, things like that, and it would be easier for them to do it, and get it right, than have to try and backtrack what you may or may not have done. Just my 2 Lincolns.

Jeep Driver

Chrysler 8.25 (factory) are 4.10s, not 4.11s........not that it matters, but that's what it is.


You screwed the pooch, you should have never touched a factory LSD 4.10, you should have sold it.
There is some guy hunting and hunting and hunting for that rear....as I was for 4 months. Needed it to match my front. They only came with the 2.5 XJ.
If you are going to re-gear you should have used a dime-a-dozen 3.55

I run 32s with a tired 2.5 and will run 33s (305-65-18) next year with a fresh 2.5........does just fine with 4.10.

Rogue4x4

Um, 8.25's came with a variety of gearsets depending on the application. And he said he WANTED to put a LS in it, not that it had one. I'm going to venture a guess and say that the PO did the gears, disc brake swap, and bedlined it, as the axle you speak of was only available with the 2.5 V6...but if it WAS that axle, yeah, not wise taking it apart...definitely a unicorn, LOL

XJwonders

2.5 V-6? Lol

Rogue4x4

2.5l 4 cylinder with the V6 manual transmission....from the wiki page:

Jeep XJs came in several standard gearing ratios:

3.07:1, manual transmission, I6 engine.
3.54:1, automatic transmission, I6 engine with Dana 44 rear differential
3.54:1, manual transmission, I4 engine with Dana 35 rear differential
3.55:1, automatic transmission, I6, V6 engines; manual transmission, I4 engine
3.73:1, automatic transmission, I6, tow package, UpCountry package, 2.5 VM diesel manual
4.10:1, 2.5L I4 engine, V6 manual transmission
4.56:1, automatic transmission, I4, offroad or tow package