Rick, good observation. Actually the little hole in the plaster is old; it’s from a Kenmore tranny a while back. Not a big deal in the workshop. Testing a Unimatic on its side wouldn't be a good idea anyway.
Brent, I know each and every Unimatic Mechanism part inside and out now, it makes it a lot easier to have it all stored in long-term memory.
Thanks Steve, I have a bunch of those bearings myself. We have some really great bearing shops here. Your oil test idea is a good one! I would put in only 5oz or so, just enough to fill the bottom of the oil pan and wait a day. If everything is dry then add the other 20oz. Be warned though, sometimes the oil seal holds until you run the motor, then it decides to fail.