Is this a Mopar sure grip rear end?

George R said
The pix are kinda small, but from here, it looks like GM however NOT Chrvrolet. It would be Buick, Oldsmobile or Pontiac. Yes, they are different from Chevrolet, and there are few performance gear ratios available for the non Chevrolet 12 bolt rear........if in fact, that is what it is.
Do you have a picture of the cover? The Chev 12 bolt cover has an oil "notch" formed into it where the other GM 12 bolts do not. Those covers are smooth.

George
Click to expand...


THIS, and I've never understood why GM did this. Why'n 'ell they didn't pick say, 3 sizes and use in all they're cars is beyond me. Remember the "corporate" engines back then? Yep. It was a mess. I remember when GM first went "metric" on oil filters. The Wix filter catalog didn't even have listings for Buick one year. There was simply a big note in the catalog to "refer to the VIN"