Q: Whistle noise right before next gear

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There is a light whistle noise (not a whine noise) only when accelerating as it shifts to the next gear, it is under the hood, drivers side, its not underneath like wheels or the body. Only have had this vehicle for a few weeks, all is fine with sound and feel in shifting etc. i did make a video and you can hear 3 times (which is the number of times you hear the whistle anyway), but not sure how or if i can upload it here, thanks

My car has 221000 miles.
My car has an automatic transmission.

Look to see if noise is at a set engine rpms. If it is then see if you can rev engine in park to duplicate the noise? If you can then you may see the noise is coming from air filter assemble. Check the air filter for paper type filter and if you have a oil bath type filter then replace it with a paper type original type to see if noise is gone. Also check air inlet tubes for cracks or loose clamps going to engine from air filter.

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