Rear End Gear Oil

[burb71]

Originally Posted by Fitz

For your 1996, GM DOES recommend synthetic oil for your differential. And, that differential does use an Eaton limited Slip center section. Your problem is you thought you had a clutche Eaton Posi unit but it is, in fact an Eaton TrueTrac which uses planetary gears not a clutch pack.

Thanks Fitz...
I was going to use Royal Purple in my posi unit, now I know better.