What Causes the Squeaking Sound When Driving on Bumpy Roads?

[VanTaylor]

Regarding the causes of abnormal noises when driving on bumpy roads: 1. Lower control arm issue: The lower control arm supports the tires and has two rubber bushings. Prolonged driving and steering wheel operation can cause wear on the small ball joints and bushings, leading to excessive gaps and abnormal noises when driving on uneven roads. Replacing the control arm can directly resolve the noise issue. 2. Stabilizer bar link issue: The stabilizer bar link, commonly known as a small tie rod, helps maintain vehicle stability during driving. For example, when the left and right wheels are at different heights, the stabilizer bar generates anti-roll resistance to prevent body roll and twisting of the bar. Prolonged driving can cause excessive wear inside the small ball joints, resulting in excessive gaps and abnormal noises.