I was testing gear operation with the rear end jacked up. As soon as the clutch engaged in any gear (except N) I get this weird clanking noise. It's not consistent tho. I have a hard time figuring out where it's coming from.
Things I observed:
The TOB is kind of noisy, I can hear it spinning (maybe they are supposed to be?)
The rear end pumpkin was moving up and down when the noise happen, but not consistent with the noise. Not sure if the clank is coming from up front and transmitting down to the rear end.
I had a hard time capturing the rear end moving, but the sound is pretty clear. Here is a video.
Put a stethoscope on the bell, trans, trans tail, near yolk on 3rd member.
Shift fork dragging or bent perhaps.
Also....Put it reverse and see what you hear.
Put it in neutral and turn the rear wheels by hand. Engine off.
Then if you can rotate the motor, in gear, at the crank and see if it makes the sound...if when it does, stop and pull the side cover.