What Causes a Car to Shake at High Speeds?

[McEleanor]

Reasons for body shaking at high speeds: 1. Incorrect front wheel alignment angle, excessive toe-in; 2. Low front tire pressure or imbalance caused by repairs; 3. Deformed front wheel rims or incorrect number of tire bolts; 4. Loose installation of transmission system components, bent drive shaft, power imbalance, deformed front axle; 5. Failed shock absorbers, inconsistent stiffness of front leaf springs. Additional information: If vibration occurs at higher speeds and causes the steering wheel to shake, you can first lift the drive axle, secure the front wheels with safety blocks, start the engine, and gradually shift into higher gears to reach the final test vibration speed. If both the body and steering wheel shake at this point, it is vibration caused by the transmission system.