Practice question

A school bus drive axle makes a clunk or backlash noise on every acceleration/deceleration and the technician finds excessive ring-and-pinion backlash. The proper correction is to:

  1. Add more axle lubricant only
  2. Replace the driveshaft
  3. Adjust backlash and verify the tooth contact pattern per specification
  4. Increase tire pressure

Answer: C — Adjust backlash and verify the tooth contact pattern per specification

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