[ericmpena]

Originally Posted by wheelhaus

I did some more experimentation, and I'm certain it's the input shaft making the noise (or the oil drag on the input shaft causing the gears to make the noise). Either way, it's not a problem.

Here's a few repeatable tests for anyone interested in verifying this for themselves. If you understand how a transmission works, it makes a million times more sense.

Test 1: Clutch in and immediately back out- the input shaft doesn't have any time to slow down, so when the clutch re-engages, the input shaft (and clutch disk) are already spinning, so you hear no noise aside from clutch movement.

Test 2: Clutch in and wait 5-10 sec- input shaft slows to a stop
Clutch out- clutch disk engages and the input shaft jerks into rotation with the engine and you hear a faint clunk.

Test 3: Clutch in and wait 5-10 sec- input shaft slows to a stop
Clutch out gently (feather engagement) the clutch disk and input shaft are brought up to speed slowly, and you should hear nothing because there's no sudden acceleration on the input shaft.

Test 3- repeat Test 1 and 2 and 3 with the engine off and parked. You will hear no clunk, because nothing is spinning.

I agree that I have no clunking when the engine is off, however I still hear a clunk when I do a feather release.