Abnormal sound caused by loose bolts and rivets and welding: This situation is more likely to occur in vehicles with long age and poor maintenance, and it is generally more obvious when starting or braking. It can be solved by tightening or replacing bolts and nuts (especially disposable nuts). This phenomenon will also appear in new cars. For example, ordinary Santana and Santana 3000 cars will have a "click" sound when turning, which is mostly caused by the loosening of the fixing nut of the front shock absorber. Because the nut is loose, there is a gap in the suspension of the shock absorber, which collides with the inner wall of the suspension sleeve to produce noise.
Abnormal sound caused by loose transmission shaft universal joint: If the transmission shaft universal joint fails, the vehicle will make a sharp sound when driving, especially when accelerating and turning sharply. Generally, it is caused by excessive universal joint clearance or hairpin, and most of them are caused by the failure to repair the dust cover in time.
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