Well as the story goes, I busted my transmission at Bonneville in '09. The rebuilder replaced all the internals with new stuff. In addition, I put on a TuffPan.
www.tuffpans.com to help keep the case straight.
The Basic Kit.
In the beginning...
The rebuilder couldn't find a R5M21, and actually ordered a whole new transmission which has a different case but the same internals. I should ask him sometime what it was.
Studs Replace the Bolts that hold the original Tin cover.
Finished product ready to install (Literally!)