Why Does the Car Make Abnormal Noises When Starting After Releasing the Handbrake?

[DelKevin]

It is normal for automatic transmission cars to make abnormal noises when starting after releasing the handbrake each time. Below are the relevant explanations: 1. Reasons for the noise: The noise from the brakes is partly due to the gap in the brake pads and partly because the brake discs have uneven hardness, containing metals such as copper, which causes the surface of the brake pads to be uneven. The slower and lighter you release the brake, the more noticeable this sound becomes. 2. Vehicle analysis: In automatic transmission cars, as long as the gear lever is not in the parking gear (P) or neutral (N), the engine has power output, even at idle speed. To stop the car, you need to press the brake pedal. When starting, the power output from the engine is already applied to the wheels, but the wheels do not move because the braking force is greater than the power. When the braking force is less than the power, the wheels will move. When you release the brake pedal, and the power and braking force are at a critical point, the friction between the brake pads and the brake discs will produce noise. If you quickly release the brake pedal (when conditions permit), there will be no sound. Don't worry, this is normal.