What Causes Abnormal Noise in the Clutch?
2 Answers
Here are the specific reasons for abnormal noise in the clutch: 1. Gear noise: The gear teeth wear thin, causing excessive clearance, which produces impact noise during operation. Noise caused by improper gear meshing. Fatigue-induced tooth surface loss or individual tooth breakage. Excessive clearance in the spline fit between the gear and the shaft. 2. Bearing noise: Abnormal noise caused by internal bearing wear in the transmission, or due to gear oil being too thin or of poor quality. Abnormal clearance between the bearing inner (outer) ring and the shaft neck (hole). Pitting on the bearing balls or burn marks on the inner/outer bearing races. 3. Other causes of noise: Insufficient oil in the transmission or gear oil being too thin or of poor quality. Foreign objects entering the transmission or loose internal bolts causing abnormal noise.
I've encountered clutch noise issues several times while driving, usually caused by release bearing problems. For instance, if you hear squeaking or rattling when pressing the clutch pedal, it's likely due to bearing wear from aging - frequent partial clutch engagement during driving accelerates this. Another possibility is hardened or cracked clutch discs, where prolonged friction between the disc and pressure plate creates noise, especially noticeable during starts or gear changes. Alternatively, broken or uneven pressure plate springs can cause intermittent noise variations. Diagnosis isn't difficult - you can check by listening for sound locations when depressing the clutch; if the noise comes from the pedal area, first inspect the springs or cable tension. I recommend regular clutch inspections, ideally servicing every two years - don't wait until noise severely impacts safety. Driving habits matter too; avoiding prolonged partial engagement in traffic reduces wear. For repairs, professional shop replacement parts are affordable (around a few hundred yuan), but delaying may risk damaging the entire clutch system.
