What Causes the Squeaking Noise When Driving Over Bumps?
2 Answers
Introduction to the causes of squeaking noise when driving over bumps: The shock absorber is malfunctioning, mainly due to collisions between the shock absorber and the leaf spring, frame, or axle, damage or detachment of rubber pads, deformation of the shock absorber dust cover, or insufficient oil. The cause should be identified and repaired accordingly. Below is an introduction to shock absorbers: 1. Meaning of shock absorbers: Shock absorbers are wear-prone components during vehicle use. Their performance directly affects the smoothness of the ride and the lifespan of other parts, so they should always be kept in good working condition. 2. Shock absorber issues: After confirming that the shock absorber is faulty or ineffective, first check for oil leakage or signs of old leakage.
A squeaking noise when going over bumps is mostly due to issues with the chassis suspension. I’ve driven several cars that encountered this problem, and most of the time, it’s caused by aging rubber bushings in the suspension system, such as stabilizer bar bushings or lower control arm bushings. Over time, these rubber components harden and crack, producing that annoying squeaking sound when compressed and rubbed over bumps. Another common cause is damaged top mounts on the shock absorbers, which are responsible for cushioning vibrations—when worn out, they can also create squeaking noises. In some cases, loose ball joints in the steering system can produce unusual sounds when turning. If metal parts are directly rubbing against each other, the noise becomes even more grating, and immediate inspection is advised to prevent potential damage to the chassis structure. I recommend paying attention to whether the noise comes from the front or rear of the car while driving, as this can help pinpoint the problem area.
