What Causes Vehicle Body Shaking at High Speeds?
2 Answers
Causes of vehicle body shaking at high speeds: 1. Inaccurate front wheel alignment angles or excessive toe-in; 2. Low front tire pressure or imbalance caused by repairs or other reasons; 3. Deformed front wheel rims or unequal number of tire bolts; 4. Loose installation of transmission system components; 5. Bent drive shaft, dynamic imbalance, or deformed front axle; 6. Failed shock absorbers, inconsistent stiffness of front leaf springs, or deformed frame. Solution for vehicle body shaking at high speeds: First, lift the drive axle and place safety blocks under the front wheels. Start the engine and gradually shift into higher gears until the drive wheels reach the final test vibration speed. Check whether the front wheel alignment angles and toe-in meet the requirements and adjust them if necessary.
If my car starts shaking on the highway, it must be due to unbalanced tires. I've encountered this situation several times, and inspections revealed that the tires hadn't undergone dynamic balancing for a long time, causing uneven weight distribution and vibrations during high-speed rotation. Wheel rim deformation or damage can also worsen the problem. Additionally, if the suspension system, such as the shock absorbers, is aged or broken, the body shakes more severely when encountering bumps. If the brake discs are uneven, shaking becomes significantly worse during high-speed braking. Worn drive shafts or universal joints can cause severe vibrations throughout the chassis. I recommend not ignoring such shaking due to safety risks—it can destabilize the steering wheel and affect handling. For prevention, regularly maintain tire balance, inspect suspension components every 10,000–20,000 kilometers, and ensure stable high-speed driving. If you're unsure, visit a professional shop for diagnosis—they can easily solve the issue with simple tools like a balancing machine.
