What Causes the Abnormal Noise When Reversing in an Automatic Transmission?

1 Answers
LaJoanna
07/30/25 2:14am
Reasons: Damage to the reverse gear teeth, such as broken or chipped teeth; damage to the reverse gear bearing, or poor lubrication of the bearing causing friction noise. Below is an introduction to related content: 1. The role of the synchronizer: The synchronizer is a device inside the transmission that ensures smooth gear engagement when shifting gears while driving. 2. The principle of engaging reverse gear: The synchronizer makes shifting easier because it synchronizes the speed of the gears. However, reverse gear uses straight-cut gears, and when engaging reverse, the reverse gear meshes with two other gears. Only in this way can the car reverse.
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