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Which mechanism does a plate type limited slip differential use?

  • A.A viscous coupling containing silicone fluid, which shears between the plates as the speed difference develops
  • B.Helical gears
  • C.An electronically controlled clutch pack, whose engagement is commanded by the vehicle stability control system
  • D.Friction plates loaded by springs and by the gear separating force

Answer: D

Stacks of friction plates between the sun gears and the cage are preloaded by springs, and the separating force of the differential gears under torque adds further load. Torque sensitivity is therefore built in. The plates wear and the unit requires periodic rebuilding. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb.

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