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curious about noise
When I shut my 2003 5.3 off and it is cooling down I have a clack noise that sounds like it is coming from the transmission pan . I noticed it a few weeks ago because I was under there with the truck off replacing the o2 sensor then the other day doing an oil change. the clack or loud tap happens on a slow interval about a minute apart. I'm just curious what could be cooling off and giving such a loud tight tap.
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