I've had a slow leak from around the pan on my 722.3 transmission, and just today found the likely cause--the cover for the B2 piston.

Given that the '87 cars have a reputation for bad B2 pistons, should I just cough up the cash and buy a new piston, or is exploratory surgery a good idea first? I already have a B2 piston seal ring, but not the big o-ring.

The transmission performs properly, so I have no reason to believe the piston is bad. Right now, I'm thinking I'll lower the transmission and replace these two seals, and stop at that. If it ain't broke...

Recommendations, please? I know there have been many threads on B2 issues, but I haven't found what I'm looking for with the searches I've done.

__________________
Rob