I have a 2009 GMC Sierra, I love the truck, it has a recently rebuilt transmission, but when accelerating, it seems to have this clunk, it is very noticeable and very embarrassing. What can it be?

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ScottyKilmer
ScottyKilmer

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do this video, and if sound comes from tranny, TAKE IT BACK https://www.youtube.com/watch?v=pqh1oH8mEqY