I have a 2010 Ford Flex. It’s been making a humming noise with a slight vibration I can feel on the floor at around 45mph and up. The humming pattern lasts exactly 3 seconds and stops for 1 second. When I let off the gas and slow down it stops. Just had all tires replaced. It does need an alignment.Everything I read says wheel bearings but nothing mentioned that specific humming pattern. Just wanted to see if it could be something else.
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