What Causes High-Speed Body Shaking?
2 Answers
High-speed body shaking can be caused by: 1. Poor fuel quality; 2. Carbon buildup in engine valves and intake pipes; 3. Poor lubrication or damage to spark plugs; 4. Insufficient engine power; 5. Aging rubber components in engine mounts and transmission mounts; 6. Aging or leaking high-voltage wires. Solutions for high-speed body shaking include: 1. Choosing high-quality gasoline; 2. Cleaning engine carbon deposits; 3. Lubricating spark plugs; 4. Inspecting components or mount rubber for aging; 5. Checking high-voltage wires and ignition coil operation; 6. Inspecting the electrical system for faults.
I've been in the auto repair business for over twenty years, and high-speed body vibrations are all too common. The most frequent issue is tire dynamic imbalance - when the wheel's weight distribution is uneven during rotation, it starts shaking noticeably once speeds exceed 80 km/h. Next is wheel rim deformation, often caused by hitting potholes, with aluminum rims being particularly prone to this. Suspension system problems can also cause vibrations, like when the lower control arm bushings age and crack, throwing off the wheel alignment. Driveshaft imbalance is another culprit, especially noticeable in rear-wheel-drive vehicles at highway speeds. Warped brake rotors aren't uncommon either, making the shaking worse when braking. Excessive clearance from worn wheel bearings can generate vibrations too. My advice: start with tire balancing if you notice vibrations. If that doesn't solve it, conduct a thorough inspection of the suspension and drivetrain systems - never compromise on driving safety.
