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Why is there a strange noise from the chassis when reversing?

1 Answers

SanJason

07/30/25 1:24am

When reversing, the strange noise from the chassis is caused by the brake caliper hitting the caliper bracket. Reasons for the reversing noise: Under the influence of gravity, the brake caliper moves downward, and the brake caliper is floatingly connected to the bracket. When driving forward and braking, there is no "play gap" at the lower connection point with the brake bracket, so no noise occurs. However, when reversing and braking, the brake caliper lifts up and hits the upper bracket, producing the strange noise. Reasons for chassis noise: Noise from disc brakes: Various auxiliary devices support, guide, position, and dampen the brake shoes. However, if any part is bent, deformed, damaged, or detached, it will lose its intended function and produce noise. Noise from the front suspension ball joint: Suspension connections often use a ball joint structure instead of a kingpin. The ball joint assembly is usually sealed and non-detachable. The ball joint seat lacks a grease fitting, making lubrication difficult. Over time, due to usage conditions, road conditions, or lack of lubrication, wear can occur, leading to noise. Noise from the front wheel shock absorber: Damage to the shock absorber can worsen the vehicle's driving conditions. If damaged, external signs of oil leakage may be visible, and noise will be produced.

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