What Causes the Squeaking Sound When Driving Over Bumpy Roads?
2 Answers
The reasons for the squeaking sound when driving over bumpy roads are: 1. Loose or excessive gap in the lower control arm ball joint, causing noise when driving over bumps; 2. Loose or excessive gap in the stabilizer bar bushings; 3. Damaged shock absorber top mount: The shock absorber top mount serves to buffer and absorb shocks. When intact, it provides a slight upward lift to the vehicle body after the tires fully land when passing over speed bumps or uneven roads, enhancing comfort. Additionally, many parts of a car have rubber components, such as wipers, tires, and chassis bushings. Over time, these rubber parts will age. Notably, the rubber bushings between the chassis components can wear out. If the rubber deteriorates, the gaps between various chassis parts will widen, leading to noise from the chassis when driving over bumps and potentially affecting the car's handling and comfort.
That car creaks on bumpy roads, and I've encountered it several times, mainly due to suspension issues. The shock absorbers or springs in the suspension system may have aged or loosened, leading to insufficient cushioning on bumps, causing metal parts to rub against each other and produce noise. Worn stabilizer bar links or dried-out rubber bushings are also common culprits. If the steering system's linkage is loose, it can cause similar sounds. Over time, not only is the noise annoying, but the car's stability is also affected. During my last inspection, I found slight damage to the wheel bearings, and the friction noise was quite noticeable. It's best to visit a repair shop promptly—small issues can turn into major repairs if neglected, and replacing parts can be costly. Don't overlook these details during regular maintenance; safety comes first.
