Makes whirring noise when driving over 35mph

1997 FORD EXPLORER
130,000 MILES • 6 CYL • 4WD • AUTOMATIC
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MISTERY1310
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I drive a 1997 Ford Explorer Eddie Bauer Edition. Automatic. This is the problem I am having. When I drive over 35 mph as soon as I let off the gas my rpms drop out, and a very loud whiring type noise comes from the engine. If I hit the gas again it stops or if I brake back down to usually under 30mph. It does it every single time. As long as I dont let off the gas it doesnt do it.

It doesnt seem to have any issues switching gears. And as long as I dont let off the gas it wont make the noise. As soon as I let off the gas petal the rpms just go down to 0 instantly and the noise starts. It doesnt sound like metal grinding, its whiring/spinning type noise, like maybe something is trying to grap or catch and its not. It is very loud though.

Any idea?
Jan 27, 2010 at 1:50 AM
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DOCFIXIT
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Hi
So let off gas noise then engine shuts off ie. 0rpms? Does the engine stall?
Have you tried manually shifting the trans so its in a lower gear to see if it still does it?
Any check engine light? If so , have it scanned for codes...

Heres a guide on some noises and their causes

https://www.2carpros.com/articles/car-howling-noise
Jan 27, 2010 at 9:23 AM