What are the reasons for body shaking at a vehicle speed of 120 km/h?
3 Answers
The reasons for body shaking at a vehicle speed of 120 km/h are: 1. Excessive carbon deposits in the engine; 2. Malfunction in the vehicle's fuel supply system; 3. Aging of engine mounts; 4. Engine misfiring or cylinder failure; 5. The need for wheel balancing and four-wheel alignment for the vehicle tires. The steps for four-wheel alignment are: 1. Connect the power and turn on the machine; 2. Attach the target to the wheel, with the target facing the camera; 3. Click to enter the measurement program on the computer page; 4. Open the camera to confirm if the target is correctly positioned, adjust if necessary; 5. Click to measure and follow the prompts to obtain the measurement data; 6. Adjust the total front wheel alignment data to the standard green range.
From my personal experience, when the car speed reaches 120 km/h and the body starts to shake, the most common cause is tire imbalance. After prolonged use, uneven tire wear or slight deformation of the wheel hub can cause the center of gravity to shift, leading to increased vibration at high speeds. Incorrect wheel alignment is also a frequent cause of shaking, affecting handling stability. Additionally, wear in the drivetrain components such as the drive shaft or half-shaft can induce resonance, especially since 120 km/h is a critical point for many vehicles. Suspension issues like worn-out shock absorbers or damaged bushings can also amplify the shaking. I recommend first checking tire pressure and wear, and performing a dynamic balance test. If the issue persists, then inspect the alignment or drivetrain components. High-speed shaking not only makes driving uncomfortable but also poses a safety risk, potentially causing steering deviations. It's best to address it promptly to avoid damaging other components. Regular four-wheel maintenance can help prevent these minor issues from occurring.
Last time I hit 120 on the highway, my car suddenly started shaking violently, as if it was about to fall apart. At first, I thought the road was uneven, but later I found out the tires were the main culprit—uneven tire pressure or missing balancing weights directly caused high-speed imbalance. Wheel misalignment was also an issue; crooked wheels can make the whole car wobble. Even worse, warped brake rotors or bent drive shafts can cause severe vibration at 120 km/h. This kind of shaking accelerates fatigue and compromises driving safety, so I immediately found a repair shop for an inspection. Experience tells me not to skimp by going to small garages—professional shops use equipment to rebalance or replace parts, and the problem was fixed right away. When driving normally, checking tire pressure and wear weekly can save you a lot of highway scares.
