Has anybody had this proplem. What could cause this. The 4X4 High light intermittently comes on (normal dry flat road). The front end of the car makes a noise like something is rubbing against a tire, a whining noise. I press the 4X4 Auto button and all goes back to normal. This occurs mostly before the car gets to a good operating temp and sometimes with a thump-thump noise in the rear end. Otherwise the SUV runs well. Over 115000 miles.