What Causes the Squeaking Noise When Driving Over Speed Bumps?
2 Answers
Reasons for abnormal noises when crossing speed bumps: 1. When abnormal noises occur while driving over speed bumps, they usually come from the chassis, caused by aging of certain components in the chassis. 2. Aging of rubber bushings in the chassis can increase the clearance between some components, leading to abnormal noises when the vehicle's chassis encounters bumpy roads or speed bumps. 3. Aging of the shock absorber top mount can cause abnormal noises when driving over bumpy roads or speed bumps. 4. Aging of rubber bushings in the suspension can make the chassis loose, resulting in abnormal noises from the vehicle.
I've driven quite a few cars, and squeaking over speed bumps is very common, mostly caused by aging or wear of chassis components. The rubber bushings in the suspension system are exposed to wind, rain, and bumps for a long time. When the rubber hardens, it's prone to cracking, causing friction at connection points and making noise. If the shock absorbers are aging or leaking oil, they'll creak when compressed; worn ball joints or loose steering gear can also cause this. Additionally, rubber bushings become harder in cold weather and are more likely to make noise. In the past, I used to check it myself: first, park on level ground and shake the tires by hand to see if there's any abnormal wobble; or ask a friend to help locate the source of the noise. I recommend not delaying too long—if a component completely breaks, it could affect handling safety. It's best to get it fixed at a professional shop. If you frequently drive on bumpy roads, replacing parts in advance can save a lot of hassle.
