I have an 03 Ram 1500 Quad 6.3 box 4x4 and Im doing my rear end now
Its not that hard. Its been some years since Ive done one.
I started getting a howl in my rear end a few months ago and decided to investigate. Inside I found pieces I later identified as the caps for the clutch packs in my limited slip. Everything else looked good. My back lash is way off and I decided to get a full rebuild kit with bearings, race, shims, crush sleeve etc. I also went for a new set of clutch packs.
It can seem kind of intimidating especially when you start in with the shimming and dial indicator. I started snooping on the web and found a book on tear down and rebuild and bought it for like $29. When you go to check out it asked if I wanted the accompanied DVD. It was only like another $20-$30 so I said what the heck.... let me tell you that DVD is an absolute life saver. This guy does a "complete" breakdown and rebuild of about 9 different rear ends with dialing in and diagnosing misalignment of test patterns etc. Im telling you this was the best $60 bucks Ive ever spent.... except for that one time in the phillippines in 1986 ahhhh yeah ok.
Heres the link for it. I mean it... if you want to do it yourself on ANY rear end this is the tutorial to do it by.
the worst part of the whole rebuild... trying to find that damn carrier pin lock bolt. Dodge... yeah not happening. Anything to do with the 9.25 rear end and they want you to spring for a whole new diff from them. 8.25's you can get any part.
The reason mine got all whacked was I found both of my U joint yokes were trashed. One was completely missing 2 caps and put a crack in the bearing holder on the front side. All replaced.
Yours may have more damage and may require more to be replaced inside.
All total I spent like $300 in parts for the gears, shims, race, bearings, oil etc
Instead of renting the tools I think I spent around $300 in specialty tools plus the dial indicator but thats only because Ill be building a new Ford 9in rear in my Notch and will need them anyhow.
No kidding on this DVD though. Very in depth and thorough