Squeaking noise when engine is running

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Waskie

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Sep 18, 2022
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Mountlake Terrace, WA
I have a 2010 Ford Expedition Limited...

When I start the vehicle, it makes a squeaking noise, not very loud, but constant. It does not appear to speed up when I rev the engine, and I don't think it speeds up when accelerating. It appears to come from the transmission, but the flex plate looks good and seems to be in good condition. I would think if it were a converter, it would speed up when the vehicle is driving. Very baffled! Any ideas?
 
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