Why Does the Car Shake When Braking at 120 km/h?
2 Answers
Braking at 120 km/h causes shaking due to uneven brake disc wear and drivetrain malfunctions. Uneven Brake Disc Wear: When brake discs wear unevenly, braking at high speeds can cause the steering wheel to shake. At certain speeds, braking can lead to asynchronous braking forces between the left and right wheels on the same axle, resulting in an uneven braking effect—alternating between tight and loose. When this imbalance reaches a certain level, it causes the wheels to roll at unequal speeds, leading to side-to-side wobbling, which is then transmitted to the steering wheel. Drivetrain Malfunction: Another possible cause of steering wheel shaking during high-speed braking is an issue with the vehicle's drivetrain. In such cases, it is advisable to inspect components like the tie rods and ball joints for signs of rust or looseness.
I often encounter this issue on the highway—brake shudder at 120 km/h, mainly due to warped brake rotors. Long-term use or overheating from sudden braking can cause the rotors to become uneven, making it feel like the wheels are struggling every time you brake. Additionally, uneven brake pad wear or oil contamination can worsen the shudder, making the steering wheel vibrate. It could also be due to unbalanced tires or wheel hub issues, which become more pronounced at high speeds. It's advisable to get the braking system checked promptly—don't delay too long, or repairs will cost more. When driving, maintain smooth acceleration and braking to avoid sudden stops. If the shudder is severe, reduce speed to a safe area before addressing the issue—never take risks.