12 Bolt Posi-lube?
 

I was going to change the oil in my 12 bolt posi rearend and am wondering what lube is best for this beast. I thought there was a special lube used for the posi rearends.

there is a special lube. When I ordered mine from Randy's Ring and Pinion they sent me a little bottle of Ford posi lube!!! I complained, but they said it was good stuff. Geez, I still think that was just wrong. :D :D

LOL...I know what you mean. I will try the GM service book and see what they say.

just go to the gm dealership and ask at the parts counter you add it to your regular rear end grease