What Causes Car Shaking at 80 km/h?
2 Answers
The reasons for car shaking when reaching 80 km/h are as follows: Pressure Plate and Pressure Spring: Damage to the clutch pressure plate or pressure spring causes an imbalance in the pressure surface, resulting in shaking during transmission and causing the entire vehicle to shake. The higher the speed, the more severe the shaking. Tires: Aging or damaged tires with bulges can cause the tires to become uneven, leading to a hopping motion when in contact with the road. Another issue is failing to perform balancing after tire repair, which causes weight imbalance during rotation, leading to hopping and shaking of the entire vehicle. Drive Shaft: A bent drive shaft twists during rotation, causing uneven transmission and resulting in vehicle shaking. Half Shaft: A bent half shaft transmits torque laterally, while the tire moves vertically forward. The instability in lateral torque output due to the bent half shaft causes the tire to wobble, leading to vehicle shaking.
When I'm driving, as soon as the speed reaches 80 km/h, I feel the steering wheel shaking violently, and even the car body starts to wobble. This is usually caused by wheel imbalance. I've experienced this myself after changing tires. I recommend you first check if the tires are unevenly worn or if the tire pressure is incorrect, especially issues with the front wheels. Sometimes, it's just a small stone stuck in the wheel balance. Problems with the suspension system can also cause shaking, such as a broken shock absorber or loose steering linkage. You can do a simple check yourself for signs of oil leakage. Issues with the drive shaft are also a potential hazard, like a bent half-shaft, which requires professional equipment to check the wheel balance to avoid losing control at high speeds. I've also experienced deformed brake discs, where braking caused even more violent shaking, requiring immediate replacement. Remember not to take it lightly. Regular maintenance of the wheel hubs and getting a four-wheel alignment can prevent a lot of trouble. Safety always comes first.
