What are the reasons for car shaking at 120 mph?
2 Answers
Main reasons for car shaking at 120 mph: 1. Poor dynamic balance of the two front wheels. If there is a pressure difference between the tires, the wheels' ability to absorb vibrations varies, which can also cause the car to shake. A deformed or bent drive shaft or excessive wear of the drive shaft ball joints can lead to vehicle shaking. 2. Differences in the vehicle's toe-in and kingpin inclination angles can cause body shaking. This issue can be resolved by adjusting the angles through a four-wheel alignment. 3. Poor performance of shock absorbers, which fail to effectively absorb vibrations. Inspect all shock absorbers and repair or replace any faulty parts. 4. Severe aging of engine mounts, which cannot absorb the vibrations generated during engine operation, transmitting them to the body and causing shaking. The old engine mounts can be removed and replaced with new ones.
When I was driving on the highway at 120 kilometers per hour, the sudden shaking of the vehicle made me terrified. The most common causes are unbalanced tires or deformed wheel rims, as the vibration intensifies at high speeds. Uneven tire wear, insufficient tire pressure, or improper tire installation can all cause shaking; wheel rims that have hit obstacles or aged and deformed can also lead to this. Suspension system components such as worn shock absorbers or ball joints, or warped brake discs causing wheel wobble during rotation, can be culprits. A bent drive shaft or damaged bearings can similarly make the car body shake. If the vehicle shakes at a specific speed, affecting handling and safety, it’s essential to promptly visit a repair shop for wheel balancing or component replacement checks.
