Rzeppa/Diff concern

DanS · Post by **DanS** » Sat Mar 14, 2015 4:58 pm

I recently re-built the front diff for my M38. Everything seemed fine until I installed new Rzeppa axels. Now there is a distinct rumble sound when I turn the diff yoke. The diff was smooth as butter before I installed the Rzeppas. Hard to tell if this is the diff making the noise or the axel joints themselves. Is this a concern? If it is, what would be the issue.

Thanks.

Dan

Post by **wesk** » Sat Mar 14, 2015 8:53 pm

Did you set up the axle end play per the Rzeppa specs for the knuckles?

Do not use the set-up for Bendix or Spicer.

http://www.willysmjeeps.com/v2/modules. ... _album.php

DanS · Post by **DanS** » Sun Mar 15, 2015 9:06 pm

That's what happens when you take breaks on a resto! I now know what I need to do, but, I don't see that any of the parts guys have the shims I need. Any ideas where I can find them?

Dan

Post by **wesk** » Sun Mar 15, 2015 10:31 pm

There are two sizes in the shim kits. Four each A-862 (0.010") and two each A-863 (0.030"). Here's two places that sell them:

Item 6

http://www.cj-jeep.com/cj3a/cj3afrontaxleparts.htm

https://www.willysjeepparts.com/Axle_Shafts.htm

Have you checked with Louie's old outfit?

DanS · Post by **DanS** » Mon Mar 16, 2015 6:11 am

No, I haven't checked with Louie. I will give him a call. Thanks for your help, it's greatly appreciated.

Dan

DanS · Post by **DanS** » Mon Mar 16, 2015 3:23 pm

One last question Wes. How many kits do you think I would need for the front diff?

Dan

Post by **wesk** » Mon Mar 16, 2015 6:46 pm

I don't recall ever finding more than two shims on one end of one axle.