What Causes the Noise When Braking in Reverse Gear?

[JulianLynn]

The reasons for abnormal noise when braking in reverse gear include friction noise from the brake disc and noise from the brake caliper bracket. Brake Disc Friction Noise: Brake pads are composed of iron plates, graphite, asbestos, etc. When they rub against the brake disc in reverse, some metal powder is produced, which can cause noise when braking. This is a normal phenomenon. Brake Caliper Bracket Noise: Since the vehicle's brake pads are mounted on the brake caliper bracket, under normal conditions, the brake pads fit tightly against the forward-facing end of the bracket without any gap, so no noise occurs when braking forward. However, noise can occur from the brake caliper bracket when reversing. Solution: Apply a thin layer of lubricant to the contact points between the brake pads and the brake caliper bracket to some extent improve this phenomenon.