Why does the car body shake at speeds between 90 and 100 km/h?
1 Answers
When the car exceeds 100 km/h, steering wheel vibration is usually caused by misaligned front wheel positioning angles, low front tire pressure, or shock absorber failure. Common cases and solutions for steering wheel vibration: 1. When driving between 80-90 km/h: Steering wheel vibration occurs but disappears above 90 km/h. Analysis & Solution: This is often due to deformation or issues in the vehicle's drivetrain. Check the front wheel alignment angles and toe-in settings. If misaligned, adjust them. Lift the front axle and test wheel rotation to check static balance and excessive tire deformation. Replace if necessary. 2. Normal on smooth roads but vibration on bumpy surfaces: Analysis & Solution: This may result from loose tie rod ends, detached rubber bushings, or irregular tire wear. Have a professional inspect and replace damaged components. 3. At 30-40 km/h: Body swaying sensation (like on a boat). Analysis & Solution: Usually caused by tire deformation from daily wear, impacts, or aging. Replace the tires. 4. Sudden steering wheel vibration during high-speed driving: Analysis & Solution: Aggressive or frequent braking may overheat and deform brake discs/pads. Replacing them typically resolves the issue. 5. Body resonance at high speeds: Analysis & Solution: Often due to twisted drive shafts or dry/unlubricated universal joints. Since these components are underneath, they're easily overlooked during maintenance. Ensure technicians apply grease to lubricatable parts during servicing.
