Abnormal sound of automobile gearbox

1. Abnormal sound due to long service time and excessive wear;

2. Abnormal sound caused by oil shortage;

3. Abnormal sound caused by the inconsistency between the quality grade of injected oil and the original vehicle regulations;

4. Abnormal sound caused by improper use and maintenance;

5. During normal use, due to wear, poor lubrication, parts quality and other reasons, the clearance between internal parts increases, parts are damaged, and bearings are loose or stuck.

6. Other possibilities are not excluded, and the test results of the real vehicle shall prevail.