ASE A4 Suspension and SteeringWheels and Tires Diagnosis and RepairMedium
A customer complains of a vibration that is most noticeable at speeds between 45-60 mph. The vibration is felt primarily through the steering wheel. What is the MOST likely cause?
- AUnbalanced front wheels
- BExcessive driveshaft runout
- CUnbalanced rear wheels
- DWorn universal joints (U-joints)
Show answer & explanationAnswer & explanation
Correct answer: A. Unbalanced front wheels
Vibrations felt through the steering wheel, especially at specific speed ranges, are most commonly attributed to an imbalance in the front wheels. Rear wheel imbalances often manifest as a vibration through the seat or floor.
Why the other options are wrong
- B. Excessive driveshaft runout (on RWD/4WD vehicles) causes a vibration felt throughout the entire vehicle, often at higher speeds, and is not typically isolated to the steering wheel.
- C. Unbalanced rear wheels typically cause a vibration felt through the seat or floor, not primarily the steering wheel.
- D. Worn U-joints (on RWD/4WD vehicles) can cause vibrations, but they are often felt more generally through the vehicle or as a clunking, not typically isolated to the steering wheel at a specific speed range like a wheel imbalance.
Front Wheel Imbalance Symptoms
Common indications of an unbalanced front wheel assembly.
- Vibration felt in the steering wheel.
- Often occurs within specific speed ranges (e.g., 40-70 mph).
- Can lead to premature steering and suspension component wear.
Memory trick: Steering wheel shakes? Front wheels are the culprits!