Ya I didn’t think ford in those years would build anything that complicated. I mean every bearing in that transmission can be bought at the local implement dealership. Just beware of the input shaft bearing original has no seals you have to take inner seal out for lubercation on the new one. This stops one of the oil spots under truck where it is parked rear u joint nothing you can do it will drip as it is a total loss oiling system. I use 600W valvata in trans. and diff that’s what ford recommend seems to work fine. It’s synthetic gear box oil for meat packing plants.