Regarding the question you asked, it may be that the shock absorber in the shock absorber is damaged, the rubber at the top of the shock absorber is damaged and many other reasons lead to abnormal sound of the shock absorber; There are also rubber parts such as the lifting lug of the balance bar and the rubber sleeve of the arm, which will also cause problems and abnormal noise after aging. It is also possible that the poor fluidity of damping oil in the shock absorber leads to excessive resistance of the shock absorber during movement, which leads to this phenomenon. Generally speaking, it has no influence on the safety of vehicles, but the ride comfort is poor.