Hi everybody. I have a slight emergency. I pulled out my rear driveshaft to have the u joints replaced. The seal for the driveshaft in the back of the transmission was bad (leaking transmission fluid) so I wanted to replace it. In the process of trying to remove it, I scratched the inside machined surface of the cylinder the driveshaft slides in (don't know the name). I put the new seal in anyway, but then thought better of it so I tried to pull the new seal out. In the process of doing that, I broke off a piece of the lip the seal fits in (on the cylinder piece) since the damn thing was aluminum. I did get that cylinder unbolted from the transmission at least. So to my question.....What the hell is that piece and more importantly, can I buy another one new or will I have to pull it out of a junkyard? Thanks a lot for the info as always.