ASE A4 Suspension and SteeringWheels and Tires Diagnosis and RepairEasy
A technician is inspecting a vehicle with a complaint of a vibration that begins at approximately 30 mph and worsens with speed. The vibration is felt primarily through the steering wheel. Which of the following is the MOST likely cause?
- AWorn universal joints
- BFront wheel imbalance
- CRear wheel imbalance
- DLoose lug nuts on a rear wheel
Show answer & explanationAnswer & explanation
Correct answer: B. Front wheel imbalance
A vibration felt primarily through the steering wheel, especially at specific speed ranges, is a classic symptom of a front wheel imbalance. The front wheels are directly connected to the steering system.
Why the other options are wrong
- A. Worn universal joints usually cause a clunking or shuddering during acceleration or deceleration, not a consistent speed-dependent vibration.
- C. Rear wheel imbalance typically causes vibration felt in the seat or floorboard.
- D. Loose lug nuts on any wheel would likely cause a severe wobble and clunking noise, not just a vibration felt primarily in the steering wheel.
Front Wheel Imbalance Symptoms
An imbalance in the front wheel assembly causes a vibration that is typically felt through the steering wheel, often at specific speed ranges.
- Vibration felt in the steering wheel
- Usually noticeable at speeds above 30 mph
- Can worsen with increasing speed
Memory trick: Steering wheel shakes? Front wheel takes! Seat shakes? Rear wheel makes!