Driver Side Wheel Grinding sound
My F150 4x4 does the same, but very infrequently (once or twice a month). I am typically driving along 30 MPH always in 2-wheel drive mode, not touching the brakes. All of a sudden, a loud grinding sound from driver-side wheel, so I gradually slow down and a "Thump" sound occurs and the grinding stops (10-15 second). I have tried punching the brakes, but the sound doesn't go away.
I just had the front brakes done and told the Tech to look for something which could cause such a sound. The technichian could not find any cause of the grinding sound. The very next day the Truck did the same thing, so I brought it back. Master-Tech pulled both front tires, test drove it 4 times, could not find anything wrong (and did not hear any grinding sound). Since the brakes are serviced, it must be something else, but what could it be? Something relating to the 4-wheel drive. I drive it in x2 mode when the problem occurs. ANY IDEAS ANYONE