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  • karjunkie 04/06/09 5:19 pm PST

    The most likely culprit is a bad wheel bearing. They make a grinding sound that goes up and down with the speed of the car. They can be louder when you turn on the wheel with the bad bearing as the weight of the vehicle is shifted to that wheel. Wheel bearings should be repacked with grease every 30K miles, so take it in to be serviced. If the bearing is bad, you will see it the minute the bearing is exposed. To check a wheel bearing, jack up the vehicle and grasp the tire at the 12 and 6 o'clock positions and attempt to rock the tire. If you feel any play, the bearings are loose and need to be replaced. Also, rotate the tire by hand. Any roughness or noise from the bearings would also tell you the bearings are worn or damaged and need to be replaced.

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