Dazed and Confused
Join Date: May 2012
Location: Upstate New York
Re: 1980 F-350 won't go in 4Lo
Normally, I'd just say that you probably need a rebuild, but the part that baffles me is the grinding. If your truck is stationary, the output of the transmission should be stationary as well which means that nothing behind the torque converter should be moving.
If the tranny is in Park or Neutral, the output should not move, however, if the clutches aren't fully disengaging, the shaft will start to spin as you pass through Neutral on the shift for the transfer case.
It almost sounds as if your truck was once used as a plow truck, the slamming back and forth really takes its toll on the drive train. Does this have lock in hubs or is it full time?