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Which consequence follows when one wheel is on ice?

  • A.The other wheel receives no more torque than the ice can react
  • B.The other wheel receives all of the available torque, which is why the vehicle is able to drive away normally
  • C.Both wheels stop
  • D.The spinning wheel absorbs all of the power, which is converted into heat within the differential gears themselves

Answer: A

An open differential always delivers equal torque, so the wheel with grip is limited to whatever the slipping wheel can react, which may be almost nothing. The vehicle is then immobile despite one wheel having full grip. Limited slip and locking devices exist to address exactly this. Checking which component actually carries the load settles most questions of this kind at once. Reading the definition literally, rather than recalling a summary, avoids the usual confusion.

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