After you installed the trans did you pour some 90 weight into the bell of the torque tube to immerse the ujoint prior to driving the truck? If you drove the truck with a dry ujoint it could be the culprit. Other than that I have nothing else. Did you re-bearing the trans also when you resealed it?


1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration