The 727, 904, 833 and all the other Mopar trans that I have seen have a tail shaft bushing at the very rear of the tail shaft housing that the tranny yoke or front tranny ball and trunnion yoke slides into scope
it is there to help stop leaks and for aligning the yoke wrench

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)