No - I got all the replacement parts and wear items from Jim @ JD (Monzas), but a replacement diff and/or ring pinion are used parts only. It's not that theyre not available, Desert Valley AP has a few full size Pontiacs , and Franks seems to have the right stuff too. But if you're looking for a replacement posi, be prepared to wait and be patient. They do turn up on the board here at the rat of maybe one a year...If youre looking to for more gear and can wait for the posi, then the 3.08 set from Franks is your best bet. To go to a 3.23 or 3.42, you need the next carrier break up and I waited 30 years before I found one..