Engines in reverse
You can actually run a modern diesel engine in reverse. It will exhaust through the air cleaner and intake through the muffler. Usually this is done by accident when the starter button is momentarily pushed and catches the engine at exactly the wrong point in its cycle. It is almost impossible to do on purpose.
In a truck with a 10 speed transmission you will have 10 gears in reverse and your reverse will move you forward.
When this happens, the older standard manual shut downs which consisted of cutting off the air intake should not be used because the exhaust pressure going out the intake will cause damage. The best method to stop a diesel engine that is running backwards is to put it in a higher gear, hold the brake down, and let the clutch up to stall it.
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