What Causes the Abnormal Noise at Idle in a Manual Transmission That Disappears When the Clutch is Depressed?

1 Answers
MaciLynn
07/29/25 10:21pm
Manual transmission idle abnormal noise that disappears when the clutch is depressed is caused by a faulty transmission bearing, where the release bearing becomes loose or detached, resulting in vibration. Below is a detailed introduction to the car clutch: 1. Working Principle: The clutch is located inside the flywheel housing between the engine and the transmission. The clutch assembly is secured to the rear plane of the flywheel with screws, and the output shaft of the clutch is the input shaft of the transmission. While driving, the driver can press or release the clutch pedal as needed to temporarily separate or gradually engage the engine and the transmission, thereby cutting off or transmitting the power from the engine to the transmission. 2. Basic Requirements: The clutch is a common component in mechanical transmissions, allowing the transmission system to be separated or engaged at any time. Its basic requirements include: smooth engagement, rapid and thorough separation; ease of adjustment and repair; compact size; lightweight; good wear resistance and sufficient heat dissipation capacity; easy and effortless operation. Clutches are divided into two categories: jaw-type and friction-type.
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