What Causes the Thud Sound When Braking to Stop?
2 Answers
The reasons for the thud sound when braking to stop are: 1. Excessive wear of the brake disc and brake pads; 2. Issues with the installation of the brake pads, such as incorrect installation or mismatched models; 3. Malfunctions in the caliper, brake disc, or brake pads; 4. Electronic linkage between the braking system and the automatic transmission; 5. Intervention of the ABS system. Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, other transport tools, or machinery. The principle of braking involves fixing a wheel or disc on the high-speed shaft of the machine and installing corresponding brake shoes, bands, or discs on the machine base to generate braking torque under external force.
As a seasoned commuter driver, when I encounter a 'thud' sound while braking, my first thought is that there might be an issue with the brake pads or suspension system. Worn-out or loose brake pads can create vibration noises when they rub against the brake disc during sudden stops. Similarly, aging shock absorbers or bushings in the suspension system can also produce unusual sounds under braking force. I recommend first checking the brake pad thickness yourself—if it's below 3mm, it's time for a replacement. Alternatively, shake the wheel by hand to see if any suspension components are loose. Although the sound might seem minor, it could mask more significant safety hazards, like severe vibrations during emergency braking, which can be dangerous. That's why I always take my car to the repair shop promptly to have the brake fluid pressure tested with professional tools, preventing potential accidents on the road. Don’t underestimate this small noise—it often serves as a reminder that your car needs maintenance. Regularly replacing parts can save you a lot of hassle.
