Shift Shaft Seal replace

I did it on 70 dart with a 904. Drop the trans crossmember down, lower the trans a couple inches, remove both shift levers, remove the tiny e-clip from the kick down shaft and be careful not to let the shaft drop down! Not a big deal but if it does drop, you'll most likely have to pull the pan to retrieve it. Get a small pick and pop the old O ring style seal out and slide the new one in. Reinstall the washer and e-clip. The shift shaft seal is a pain to pop out with out gouging anything but it'll come out. Once out you can slide the new one into place and use a socket to push it in. I used a big C clamp on the top of the socket and bottom of the trans to press it in. Reinstall the shift levers and reinstall the transmission crossmember.