What Causes the Clunking Sound When Releasing the Clutch in a Manual Transmission?
1 Answers
It may be caused by loose friction plates on the steel plates or impact noise between the release levers and the window holes. Extended information is as follows: 1. Metal impact sounds require immediate inspection: If the clutch makes a "click" or "clunk" metal impact sound when engaging or disengaging, especially more noticeable when starting with a heavy load, it should be inspected or replaced. 2. Collision sounds require immediate inspection: If a "clatter" impact sound is heard, this is due to loose friction plates on the steel plates or impact noise between the release levers and the window holes, and should be inspected promptly. 3. Sharp squealing sounds require immediate inspection: If a sharp squealing sound is heard just before the clutch engages, which disappears when the pedal is pressed and reappears when released, this is caused by broken steel plates of the driven disc or exposed rivet heads scraping against the pressure plate or flywheel, and should be inspected. 4. Jerking sounds require immediate inspection: If the clutch pedal is released very slowly and the vehicle jerks forward with a "thud" sound, this is due to sudden engagement of the driving and driven parts. The reasons come from two aspects: First, deformation of the driven disc or oil contamination on the friction lining causing abrupt clutch engagement leading to jerking; Second, stiffness in the linkage system causing the pressure plate to suddenly press against the driven disc, resulting in jerking.
