Damnit.. I have to elaborate now after looking at the picture I snapped of my tranny when it was out.
The fork that moves the TOB has no return tension, no return spring. The slave cylinder returns when you let your foot off the pedal and it allows fork to return to its resting position. Now here's the fun part. That
fully resting position is far enough back that the TOB wouldn't be making contact if the TOB returns
all the way back. But there's nothing in place acting upon it to return it all the way back.
So what happens when the lubed shaft the TOB rides back and forth on is no longer lubed and there's friction? When you release the clutch pedal the TOB may not slide back enough to disengage the PP teeth.
The best analogy I can make is your brakes. There's no piston return spring in your calipers but when you lift off the brake pedal, the pads relax enough that they don't
drag on your rotor. Anyone have a sticky caliper? What happens?... Pad keeps in contact with the rotor just enough to get really hot or wear out prematurely.
Well, I think next weekend I will go the hardware store and find out how to make my own clutch return spring.
Something like this:
