What kind of gear oil should I put in it and how much of it. I'm changing the seals and gaskets cuz they were leaking so I want to clean it and put new oil in it. Can I use brake cleaner to do the job or is there something else. All suggestions will be helpful. Thanks

Easy. None. That posi case is trashed. The pinion gear teeth chewed it up. In my opinion there's nothing there you want now.

Here's a working link:

http://www.youtube.com/watch?v=kcov9zkXWZc

^^^^^
This.

as I said before, 26 years of whatever, better off just getting an eaton, call it a day. I've learned there's no cheap way to get what your looking for when it comes to performance.

If the case is good you can get a rebuild kit with new springs and everything and probably be good, but once the case is trashed IMO it's done.

:cry:

there is a tooth or two missing on the ring gear too. Its trash