need help with problem. i hear a noise coming from right front wheel area after disengaging my 4 wheel drive. after i start going forward after disengaging my 4 wheel drive i hear a whinning sound but it almost sounds like a card in the spoke of a bicycle tire. the fast i go the higher pitched it gets . then it will suddendly click and go away. please help. i dont know what could be wrong. my truck has never been driven hard and only in 4 wheel drive a few times. only 12000 miles on truck.