Practice question

Before condemning a school bus driveshaft for an imbalance vibration, the technician should FIRST:

  1. Inspect for missing balance weights, undercoating buildup, dents, and worn U-joints
  2. Replace the differential
  3. Flush the transmission cooler
  4. Adjust the engine valves

Answer: A — Inspect for missing balance weights, undercoating buildup, dents, and worn U-joints

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