What Causes the Buzzing Resonance at 80 km/h?
2 Answers
Possible reasons for buzzing resonance at 80 km/h are as follows: 1. Incorrect wheel camber causing tire wear, leading to wave-like wear on the tire tread. This results in a buzzing sound and body vibration when reaching a certain speed. 2. Worn wheel bearings. Worn wheel bearings produce a buzzing noise that increases with speed, whether in gear or coasting in neutral. 3. Due to vehicle design or loose/deformed components, the vehicle's resonance frequency at this speed range causes increased vibration and noise.
I've also experienced the humming noise at 80 km/h while driving, which is mostly related to tire imbalance. Uneven tire wear or mud stuck on the rims can cause resonance and produce a humming sound at specific speeds. That's exactly what happened to my car last time—the inspection revealed uneven wear on the inner side of the front tires, and the noise disappeared immediately after wheel balancing. Damaged wheel hub bearings can also cause similar symptoms; if the bearing balls are faulty, the noise will increase with speed. Another possibility is worn universal joints on the drive shaft, especially noticeable in rear-wheel-drive cars, where you might feel a clunking sound from the chassis when turning. I recommend prioritizing a four-wheel alignment and dynamic balancing at a tire shop, and while the car is lifted, check the bearing clearance. Ignoring these minor issues for too long could damage the suspension system.
