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The mechanical device that engages a toothed wheel on the output shaft when P is selected is the _____.

  • A.manual valve, which is moved by the selector lever and directs the hydraulic pressure to the appropriate elements
  • B.park pawl
  • C.one way clutch, which instead permits a planetary member to be held in one direction and to freewheel in the other
  • D.band brake

Answer: B

The pawl locks the driven wheels mechanically and works whether or not there is hydraulic pressure. Applying the parking brake before selecting park keeps the load off it, which matters greatly on a steep gradient. The shared behaviour explains why these belong together and the differences explain why both exist. Tracing the requirement back to the physical constraint that produces it makes the answer follow.

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