I know I gave up on rebuilding one and simply rebuilt an ATX and threw it in instead. I could not find any detail parts to rebuild to like new at all, even though one could rebuild one in about an hour. I figured since trans was specialized to Pinto/Bobcat alone, Ford squelched all extra parts like others specific to Pinto alone to quickly get them off the road as quickly as possible.
At the time, mention any part and the word 'pinto' in same sentence and dead issue as far as Ford concerned. I was told then by Ford parts guy they had dropped all Pinto specific parts to get rid of the cars. Had no trouble getting quite a few Mustang II parts for same year car.
Even my standalone manual trans repair shops who could otherwise get anything indicated there were absolutely zero parts available for those, around 1993 or so............ ........