What is your question?
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What is your question?
A loud thud happens everytime you shift from park to reverse and Drive to reverse. Engine just replaced. Check engine light on for transmission sensor, high voltage.

1 Reply
I would see if for some reason a wire for the transmission got pinched when the engine was replaced. This could cause the code and also the thud from probable excessive transmission pressure due to the wiring issue. Look for the harnesses and follow them from the transmission to the various connectors.