In general, the causes of abnormal chassis noise can be divided into the following categories:

1. Interference between parts can be caused by impact or installation of other equipment, which makes two parts interact with each other. Solution: Only through plastic repair or replacement of related parts can there be no interference between parts;

2. The bolt or nut is loose. Possible reasons: the bolt is naturally loose after driving on the road with poor road conditions for a long time; Improper disassembly and installation damages the bolts; Insufficient tightening torque or incorrect bolt specification. Solution: Tighten or replace bolts and nuts;

3. Failure of the universal joint of the transmission shaft. Possible reasons: the dust cover is broken or the oil leakage is not repaired in time. Solution: replace the universal joint of the transmission shaft with a new one;

4. Abnormal sound caused by damage of each ball head, suspension and connecting bracket. Possible causes: failure caused by loose ball head or aging and cracking of rubber gasket after long-term use. Solution: replace new ball head or supporting pad;

5. Abnormal noise of the braking system. Possible reasons: loose brake pad, brake caliper or bracket; Brake pad or brake disc failure; Solution: Check whether the brake system is loose and whether the brake pads and brake discs are abnormally worn.

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