Alan & Gary,
The transmission still has to transmit drive torque through the
uni-directional (Sprague) clutch in the OD unit, even when OD is
dis-engaged. Not relevant but also, the rear cone clutch takes the over
run & reverse torque to prevent free wheeling. If the Sprague clutch is
slipping it will get rapidly worse.
You are probably right about it being the clutch. I had a situation with
the clutch slipping due to a sticky release mechanism causing it to not
fully engage. I guess the standard remedy of replacing the clutch
release hose would be a good first try. I have never experienced it, but
many people say that an internally collapsed hose will act as a one way
valve & not let fluid return when the clutch pedal is released.
Blue One Hundred wrote:
> Dave / Gary-
> You are going from a dead stop so the OD won't be
> engaged at this time... so slipping or bad OD pump
> isn't the likely problem.
> Sounds like the classic symptom of a slipping clutch
> disc. It's worn out and has to be replaced. Your
> flywheel is probably a bit glazed as well, and needs
> to be resurfaced.
> If you're lucky you can try driving while dropping the
> clutch pretty fast for a while... this may help bring
> back some surface to the disc & flywheel & stop the
> slipping under heavy load...but to be honest it sounds
> like ....
> .... Time for a clutch job!
> '53 BN1 '64 BJ8