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Which noise indicates a worn inner joint?

  • A.A shudder or vibration under hard acceleration
  • B.A clicking noise on full lock, which is produced whenever the joint is required to operate at a large angle
  • C.A squeal when braking
  • D.A rumbling noise that increases with the road speed and is unaffected by the load being transmitted at the time

Answer: A

A worn tripod joint produces a shudder felt through the vehicle as it accelerates hard from low speed, particularly on full lock. The outer joint clicks instead. The two faults are distinguished by the symptom rather than by inspection. Tracing the requirement back to the physical constraint that produces it makes the answer follow. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb. The shared properties explain why these belong to one family, and the differences explain why more than one exists.

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