Why does the car body shake when driving at high speed?
3 Answers
Here are the reasons why the car body shakes when driving at high speed: Front wheels: Incorrect front wheel alignment, excessive toe-in. Imbalance: Low front tire pressure or imbalance caused by tire repairs. Quantity: Deformed front wheel spokes or incorrect number of tire bolts. Deformation: Loose installation of transmission system components, bent drive shaft, power imbalance, deformed front axle. Shock absorber: Failed shock absorber, inconsistent stiffness of front leaf springs, causing vibration and steering wheel shake at higher speeds. You can first lift the drive axle, insert safety blocks for the front wheels, start the engine and gradually shift into higher gears to reach the vibration speed of the drive wheels. If both the body and steering wheel shake at this point, it is caused by the transmission system.
When driving on the highway, my car shakes violently, mainly due to tire imbalance or axle issues. In the past, when driving at high speeds, uneven tire wear or improper dynamic balancing caused the entire car to wobble, especially noticeable when exceeding 100 km/h. It might be due to improper calibration during the last tire change, leading to axle misalignment. I recommend first checking tire pressure and wear conditions, then testing acceleration at high speeds to observe changes in shaking. If the issue persists, visit a professional shop for a four-wheel alignment and dynamic balancing. Such shaking at high speeds is quite alarming, affecting handling safety and increasing fuel consumption. Regular tire maintenance can prevent problems, such as checking every six months. In short, don't underestimate this shaking; address it early to avoid accidents on the road.
I found that most high-speed vibrations in cars are caused by suspension system issues, such as aging shock absorbers or loose suspension joints. Once during a long-distance drive, the car shook violently on uneven roads, and it turned out the rear suspension cushion was damaged and lost its damping ability. Leaking shock absorbers can make the car bounce, while rusted joints can amplify vibrations. Don't just look at the surface; check the tightness of all chassis components. It's best to also inspect the brake discs for flatness during maintenance to avoid cross-related issues. Prolonged vibration accelerates component wear, and replacing a set of suspension parts isn't expensive. Pay attention to abnormalities when going over speed bumps in daily driving – early repairs can significantly improve driving smoothness.
