What Causes the Noise When Shifting Gears in an Automatic Transmission?

[EmmaRose]

Automatic transmission shifting noise can be caused by: 1. Lack of lubricant in the release bearing; 2. No gap between the release bearing and the inner end of the release lever; 3. Dirt between the release bearing sleeve and the guide tube, or fatigue, breakage, or detachment of the release bearing return spring and pedal return spring; 4. Loose fit between the driven plate spline hole and its spline shaft; 5. Fatigue or breakage of the driven plate damping spring; 6. Loose rivets on the driven plate friction disc. An automatic transmission means the driver does not need to manually shift gears; the vehicle automatically selects the appropriate gear based on driving speed and traffic conditions, making driving more convenient.