2007 F150 114000 miles when I turn left makes a humming sound similar to a knobby (off road)tire would. No noise unless driving and starts when slightly turn left. I replaced serpentine belt and wondered if it could be electric fan clutch but didn't think turning left would be relative to that?|||You didn't mention if the truck was a 4WD or not. Wheel bearings would be my first guess, but 4WD trucks may have a U-joint problem as well as a bearing going out in the front differential.|||have the wheel barrings checked|||Wheel bearing.|||Sounds like Front Tires are hitting Inner Fender wells.

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