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Which characteristic does a Torsen differential have?

  • A.Its bias increases with the transmitted torque
  • B.Its bias depends on the difference in speed between the two wheels rather than upon the torque being transmitted
  • C.It locks completely
  • D.It requires an electronic control unit in order to determine how much torque should be sent to each of the wheels

Answer: A

The worm or helical gears within a Torsen unit generate friction proportional to the torque passing through them, so the bias rises with the load. It is entirely mechanical and instant in response. Its weakness is that with zero torque at one wheel it can transfer nothing. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. A symptom that appears under one condition and not another is what narrows the diagnosis quickly.

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