You need to regularly check the fluid levels in the transmission and the rear end.
The fluid for the front u-joint (inside the torque ball) is supplied by the transmission.
If your seal in the torque tube leak, the fluid inside the torque ball will leak into the rear end.
This will result in a low level in the transmission and an over-filled situation in the rear axle.
Carl


1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission