Quote:
Originally Posted by woodsman
Is the clutch disc a high-friction/HD/long-lasting, sprung type? Mine is and after I've been in stop and go traffic for a bit, something starts to 'hop and bang' as I'm nearing full release. I've attributed this to the high- friction, long lasting, sprung disc and high force, pressure plate. It disappears if I purposely ride the clutch. It never does it when the car's cold. I've also observed that when it's occurring, I am failing to release the clutch. Why? Because the car will catapult forward in a neck-snapping fashion or it will stall. SO what I'm missing is a little slip while 'things' synchronize to the same speeds. I have a 'Grabby clutch' because it's designed for circumstances outside of the OEM design parameters. Hence the nasty behaviour. I WAS going to turbo my car. Same problem or not?
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I'm tempted to say yes, as I too have what I suspect to be a very similar setup to you. The only difference is that this noise was EXACTLY the same with the OEM dual-mass flywheel and solid clutch setup. It is true that riding the clutch stops the noise, if I give it some gas up to 2k rpm then come off slowly the noise is gone or at least greatly subdued. My theory on this is that there is something loose somewhere which gives driveline play and a progressive application of torque keeps things at an extreme in the range of play. When the clutch is slipping at semi-engagement the torque is not progressive and it causes the component that has some play in it to bounce around between the maximum and minimum range of play, hence the noise as it bounces back and forth.
I hope that my explanation can be understood, I am not a mechanic or an engineer so please forgive my poor attempt.
The question really is what can be causing that much play in the drivetrain?