Rear hub bearing on 91 w350 went out. Chewed up inner race. I matched up the Timkin numbers to the new race and it just falls in the hub. Can anyone explain why!?

The race #'s match but the old race is roughly thirty-thousandths bigger OD than the new one.

Timkin # is BR45220

 

If the old race was spinning inside the hub the hub is junk.

 

The old race was not spinning. I had to drive it out of the hub. The NEW race just falls in the hub.

 

Strange race #'s match and races themselves dont. I would take old race to parts house and start mikeing races out.