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Which noise indicates a worn outer constant velocity joint?

  • A.A rumble that varies with road speed and is present when the vehicle is travelling in a straight line as well
  • B.A whine under acceleration
  • C.A knock when the drive is taken up, which is produced by backlash within the splines at the inner end of the shaft
  • D.A clicking on full lock under power

Answer: D

The characteristic rhythmic click on full lock under load is produced by the worn balls riding over the damaged tracks. A rumble in a straight line suggests a wheel bearing. The condition under which the noise appears identifies the component. Checking which component actually carries the load settles most questions of this kind at once. Naming what changes and what stays the same is the reliable route through questions of this shape. Framing the question as which quantity the change acts upon makes the answer follow without calculation.

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