Tim,
Let me re-word what I meant to say.
The very end of the tail housing on the Hydra-Matic and Powerglide transmissions is cast/shaped different,
than the very end of the tail housing on the 3 or 4 speed manual shift transmissions.
End of the HM tail housing End of Manual Shift trans Fig. 22 and 23
In order for the U-Joint Ball Housing to fit properly onto the end of the tail housing of the Hydra-Matic and Powerglide transmissions.
GM stamped out a piece of metal (ball seat) which is placed on the end of it's tail housing.
Ball Seat in Place,,
Master Parts Catalog Group # 5.565 Seat First the
Rubber O Ring 1,
Rubber O Ring 2 is placed into the grove, then the Ball seat.
Now the very end of the HM tail housing has the same shape as the tail housing end of the 3 or 4 speed manual shift transmission.
You could say the ball seat is cast right into the end of the tail housing of the 3 or 4 speed manual shift transmissions.
Therefore no need for a separate stamped out piece, for the 3 or 4 speed manual shift transmissions.
I really don't understand why GM didn't cast the ends of the HM & PG tail housings,
the same as the 3 or 4 speed manual shift tail housings.
