What Causes the Abnormal Noise When Starting After Releasing the Handbrake?

[DelRuby]

This is a normal phenomenon for automatic transmission vehicles. The abnormal noise from the brakes can be attributed to two main factors: the gap in the brake pads and the uneven hardness of the brake discs, which may contain metals like copper, leading to an uneven surface on the brake pads. Here are some precautions for using the handbrake: 1. Avoid pulling the handbrake to 100%: The purpose of the handbrake is to stabilize the vehicle after stopping and prevent accidents caused by rolling. However, pulling the handbrake to its maximum is not ideal; pulling it to about 70%-80% is sufficient. Over-tightening the handbrake can shorten the lifespan of the handbrake cable. 2. Never engage the handbrake directly during high-speed driving: Applying the handbrake directly while driving at high speeds is extremely dangerous. Since the handbrake typically acts on the rear wheels, sudden engagement can cause one of the rear wheels to lock up, leading to skidding or even a rollover.