The 'ball' is part of the torque tube and seals to the trans socket with this cork seal:
[img]https://www.stovebolt.com/ubbthread...umber/39226/filename/20220129_145325.jpg[/img]

But can't find anywhere the rubber fits, except maybe with the dust shield on the other end?

1948 Chevy Thriftmaster 3/4-Ton
Poncho "farming" in Ontario
Starting in the DITY
Continuing in the Project Journals
More images

There are only 10 types of people in this world, those who can read binary and those who can't.