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2014 chevy Silverado winding sound at 45-55 mph only when on throttle


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Hi I have a 2014 Chevy Silverado 1500 4.3 I have a winding sound 45-55 mph only when on throttle truck has a rebuild motor, jasper transmission and rear dif.

I put my truck on a lift and ran it sounded like noise was coming from drive shaft so I changed out the drive shaft today and my noise changed tones a little bit but is still there is it possible that it’s the transfer case does not change at all if it’s in 4x4 or 2x4 if I go below 45mph the sound is completely gone if I go above 55 it’s gone too but it starting to get louder and I can’t figure out what it is. It started so after I changed the transmission the noise is also the reason I changed the rear dif

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