What Causes Steering Wheel Vibration at Speeds Between 80 and 90?

[OChristopher]

This condition is mostly caused by tire deformation or issues with the vehicle's drivetrain. At this point, it is necessary to check whether the front wheel alignment angles and toe settings meet the requirements. If they are misaligned, adjustments should be made. Alternatively, lifting the front axle and testing the wheel rotation can help check the static balance of the wheels and whether the tire deformation is excessive. If the deformation is too severe, the tire should be replaced. Below are specific scenarios: 1. Difficulty in Steering: During driving or braking, the vehicle automatically veers to one side of the road. To maintain straight driving, the driver must firmly hold the steering wheel. Causes of this deviation include: inconsistent front wheel specifications or tire pressure on both sides, unequal rear camber or wheel camber angles, uneven front wheel and bearing clearances, inconsistent arch or elasticity of the leaf springs on both sides, excessive difference in wheelbase between the left and right sides, excessively small wheel brake clearance or out-of-round brake drums causing one brake to stick, resulting in brake drag, or uneven vehicle loading. 2. Hand Numbness While Driving: When driving at medium to high speeds, there is a periodic noise from the chassis. In severe cases, the cab and doors may shake, and the steering wheel vibrates intensely, leading to hand numbness. This is due to the destruction of the dynamic balance of the steering transmission system, caused by excessive wear of the drive shaft, spline shaft, and spline sleeve. 3. Heavy and Laborious Steering: Causes include excessively tight rolling or sliding bearings in the steering system, poor bearing lubrication, overly tight or dry ball joints of the steering tie rods, bent steering shaft or sleeve causing jamming, improper front wheel toe adjustment, bent or deformed front axle or frame, and insufficient tire pressure, especially in the front tires. 4. Steering Wobble: Often caused by front wheel wobbling during driving. When the vehicle reaches a certain high speed, steering wheel shaking or oscillation may occur due to: dynamic balance disruption of the front wheel assembly from tire patching or repair, loose components in the drive shaft assembly, dynamic balance disruption of the drive shaft assembly, failed shock absorbers, inconsistent stiffness of leaf springs, worn or loose steering system components, and improper front wheel alignment.