I just purchased a '60 Electra Flattop. The car had been sitting many years and the previous owner bought it non-running as well. Got the motor to fire up and idle.
The car rolls even though the gear selector is in park. When I attempted to put it in neutral with the car running. The transmission made all kinds of "bad" noises. Tried drive, same thing. I ran across another dynaflow out of a '62 LeSabre for sale that is supposed to be in good order. I know the '62 was an open driveline as opposed to the '60 torque tube design.
Are the rear sections of the transmissions interchangeable?
Are there any other differences that would cause problems with a swap out?