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What causes abnormal noise when starting with a dry dual-clutch transmission?

2 Answers

VonNatalie

07/29/25 4:36pm

There are three main reasons for abnormal noise when starting with a dry dual-clutch transmission. Bearing wear and damage: When a bearing is damaged, it cannot operate normally, resulting in abnormal noise and even damaging the transmission components, which can worsen the issue. This can be caused by wear on transmission components or the use of replacement parts with insufficient precision, such as excessive clearance between worn or new gears and the original gears. Poor lubrication: In this case, the corresponding lubricant should be replaced; otherwise, it will accelerate transmission wear and shorten its service life. Loose transmission bolts: Vibrations during use can loosen the bolts, so regular inspections are recommended.

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SanStephanie

08/14/25 5:54am

I've encountered this situation before too - the dry dual-clutch makes abnormal noises during startup, mostly caused by worn clutch plates. Especially in city driving with frequent stop-and-go, excessive semi-engagement operations can easily overheat and deform the friction plates, resulting in rattling sounds. This not only affects driving experience but may also accelerate transmission damage. You should promptly check the clutch fork and control unit calibration, replacing worn parts if necessary. Drive gently in daily use, avoid sudden acceleration or frequent low-speed gear changes to reduce such issues. Regular transmission maintenance is also crucial - don't let abnormal noises develop into major problems.

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