What Causes the Abnormal Noise at 70 to 80 km/h?
1 Answers
The cause is bearing failure. Below are common abnormal noises in cars: 1. Transmission noise: If the car makes abnormal noises while idling, and the noise disappears when the clutch is pressed, it indicates that the noise originates from a transmission malfunction. Transmission noises are generally caused by bearing or gear wear. 2. Steering wheel noise: If abnormal noises occur when turning the steering wheel left or right, it is due to a malfunction in the steering gear. Additionally, oil leakage from the steering gear dust cover, insufficient tightness or aging of the power belt can also cause abnormal noises. 3. Suspension noise: The suspension system operates continuously while driving, and the rubber bushings between the shock absorbers and various links will inevitably wear out. When the bushings age or fall off, abnormal noises will occur.