What Causes a Car to Shake When Driving at 80 km/h?
2 Answers
Reasons why a car shakes when driving at 80 km/h: 1. The clutch pressure plate spring is damaged, causing uneven pressure on the surface, which leads to shaking during transmission and results in the entire car shaking. The higher the speed, the more severe the shaking; 2. Old or damaged tires with bulges cause the tires to be out of round, leading to a jumping rotation when in contact with the road surface; 3. A bent car driveshaft causes twisting during rotation, resulting in the entire car shaking; 4. A bent half-shaft, which transmits torque horizontally while the tires move vertically forward, causes instability in the output of horizontal torque, leading to tire wobbling and shaking the entire car; 5. Check the wheel hub for deformation. If the vehicle shakes violently while driving, pull over immediately to inspect and resolve the issue. If the problem cannot be resolved, call for a tow truck. Do not continue driving under any circumstances.
My car used to shake violently when driving at 80 km/h, and that experience really confused me. Later, I found out it was due to improper wheel balancing—they forgot to adjust the balance weights when replacing the new tires, causing instability and shaking at high speeds. It could also be an issue with the tires themselves, such as uneven wear or deformation, which worsens vibrations at high speeds when they become out-of-round. Problems with the suspension system, like leaking shock absorbers or worn ball joints, can also cause shaking, especially if maintenance has been neglected for a long time. Additionally, issues with the universal joints in the drive shaft can lead to significant vibrations at certain speeds. I suggest you quickly check if the tire pressure is balanced and look for any bulges, then take it to a professional shop to test the wheel balancing and suspension. Delaying could damage the car and be dangerous—driving at high speeds with this feeling is nerve-wracking, so safety comes first.
