The Vehicle's Direction Deviation Should Be Promptly Checked for Eight Major Causes

1. Four-wheel alignment deviation. In most cases, it can be solved by four-wheel alignment, but if it still cannot be solved by four-wheel alignment, it must be caused by other reasons.

2. The tire patterns on both sides are different, or the tread depth and depth are different. It is recommended to use the same tire for the entire vehicle. At least the two tires on the front and rear axles must be the same, and the tread depth must be the same. If the wear limit is exceeded, it must be replaced.

3. The tire pressure on both sides is not equal. Uneven tire pressure will cause different tire sizes, and deviation will inevitably occur when rolling.

4. The front shock absorber spring is deformed and the buffers on both sides are inconsistent. After the shock absorber spring is removed, it can be pressed or compared to judge.

5. The front shock absorber fails. After the front shock absorber fails, the two suspensions, one high and one low, are subjected to uneven force, resulting in deviation. The absorption performance of the shock absorber can be tested by a special shock absorber tester to judge the quality of the shock absorber; if it can be disassembled unconditionally, it is judged by stretching.

6. Excessive wear and tear of vehicle chassis components, abnormal clearance. Steering tie rod ball joints, support arm rubber sleeves, stabilizer bar rubber sleeves, etc. are common components with excessive clearance, and should be carefully checked when hoisting the vehicle.

7. Poor wheel brake return and incomplete separation. This is equivalent to one wheel always being partially braked, and the vehicle will inevitably deviate when driving. During the inspection, the temperature of the wheel hub can be felt. If one wheel is much higher than the other wheels, it means that the wheel has poor brake return.

8. The overall deformation of the frame. If the wheelbase difference on both sides is too large and exceeds the allowable range, it can be measured with a tape measure; if it exceeds the range, it must be corrected with a correction table.