I realize the locking mechanism in “P” prevents the car from moving but how does it move in “D” in the first place? The car is turned off! There is no ignition to the engine!
In: Engineering
Because there is nothing physically locking the transmission from moving. Fluid pressure inside an automatic along with clutches is what keeps it locked and going forward when it’s running in D or R When it’s not running and there is no pressure it’s mostly free.
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