Quote:
Originally Posted by Gords_zenith
I 100% agree with this, mine does it too, and only if I release the clutch really fast, but if I feather it than I don't get the clunk. Also, while driving you have feather this clutch because of the delay valve causing it to be jerky otherwise. I have a ford ranger with 4.0 SOHC, 5 spd that does the sound as well. And it has 220000 km on it, mind you it's mazda tranny so it could be something the Japanese do when designing. My $0.02
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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.