it seems my 2011 f150 screw makes a high pitched squeal when accelerating from a stop once it hit roughly 2000 rpm's. The noise sounds like its coming from the left front wheel but i'm not sure. Once i let off the pedal or the vehicle down shift away from 2000 rpm's the high pitched squeal goes away. It sounds more like a chirping than a squeal i guess i would say. Any thoughts on what it might be?