12 years? How many runs? Lot of trash in the pan? Fluid stink/discolored? What does the rear support look like where it supports the output shaft? Pump OK? What kind of oil?

Look like it has some runs on it. If the rest of it looks OK, I would clean it up, replace the stuff that is questionable, check and fix clearances and end plays - including the pump - and put it back together.

Last edited by CMcAllister; 05/12/20 10:25 PM.
If the results don't match the theory, change the theory.