What kinda diff?

[Senor_paco]

I bougght a differential set off a guy, and need help ID-ing it. I'm not that familiar with the different posi/auburn types. It has no clutches. Inside it has what appears to be a small(1" or so) flywheel with psring loaded cams, kinda like ditributor weights. It appears as though when the wheels turn differently, this flywheel starts spinning, and when the cam weights flip out far enough, they hit this big metal tang that appears to lock the sides together. It is a 12 bolt, but i forgot the manufacture date info off of it.

Oh, and a couple of other things. Can I get a "short" install kit from Jegs to install it?

and another. I had it in a 5gallong bucket, and it got wet. I have to have the carrier bearings replaced on the outside, but what can I use to clean the internals? any help is appreciated.