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You plan to descend a long grade in a truck with an automatic transmission. What should you do with the range selector?
- A.Move the selector repeatedly between ranges on the way down
- B.Select a lower range before starting down so the transmission helps hold speed back
- C.Shift to neutral so the truck coasts quietly
- D.Leave it in the highest range and rely on the brake pedal
Correct answer
B. Select a lower range before starting down so the transmission helps hold speed back
Why
A lower range keeps the transmission from upshifting and adds engine braking on the descent. Choosing it at the top, while speed is still low, is far safer than trying to downshift after the truck has already gained speed.
Manual topic: Basic Control - Automatic Transmissions · From the General Knowledge practice bank (GK-119).