What Causes the Abnormal Noise When Shifting Gears in a Manual Transmission?

1 Answers
VonBryce
07/30/25 6:20am
There are two main reasons for abnormal noise when shifting gears in a manual transmission: Gear Shift Mechanism Noise: The gear shift structure of a car consists of the gear lever, cables, gear selection and shift mechanism, shift fork, and synchronizer. If the noise during gear shifting is relatively minor and originates near the gear lever, it is likely due to the gear shift mechanism. Transmission Noise: The internal control mechanism of an automatic transmission is highly precise, with minimal clearance between components. It includes the clutch, differential, input shaft, output shaft, and various gears. Over time, transmission oil can accumulate sludge, increasing wear on friction plates and other components. Wear on these parts can lead to malfunctions and cause abnormal noise.
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