Rebuild 8 3/4

[jakehill]

Hi, I have never rebuilt a rear diff. Its an 8 3/4 I would like to re gear it with 3.91 and add a limited slip. I have searched for a rebuild how-to, but nothing. It sounds terrible when I drive. I know its the rear. I cant find a rebuild kit. Any advice for an idiot?

 

[mopar head]

search mopar muscle mag site. they should have a few tech articles on the subject. Their`s plenty people here that have experience, but to get em to chime in?8) e-bay- summit have kits I believe. I`d venture you`ll need a couple specialty tools also. Spanner, indicator, etc

 

[wish4hemi]

A factory service manual is your friend here. Specialty tools are handy but not absolutely necessary. I've done two in my garage, which is not heavily fortified with specialty tools. A torque wrench, a press, and some sockets will just about do it. Just read the service manual and follow the directions carefully.

 

[daredevil]

How do you set pinion depth without the specialty tool?

 

[GTSCowboy]

How do you set pinion depth without the specialty tool?

...The only way to be sure is with a "pinion depth checker"(unfortunately a specialty tool)... alot of in-experienced guys will just re-use the original pinion shims ...not bad as a starting point...but,that's definetly taking the long & drawn-out way... but not impossible to get right

 

[moper]

I use brand new "checking bearings" to do them. The problem was I kept destroying bearings presing them on and off. When I got a job at a truck shop, he turned me on to taknig a new bearing and enlarging the ID so it can be tapped on and off. It can go faster than the fixture if you've got shop air...lol. You'll need a magnetic base dial indicator, a vernier or micrometer, a rotating torque torque wrench (Not the same as a "normal" torque wrench), anda fixture to hold the chuck if it's a "489" and you're using the crush sleeve, which I would advise replacing with the spacer and shims.

 

[needsaresto]

I think Randy's ring and pinion sells video's on the subject.