Put the truck in reverse up my driveway yesterday, and the clutch made a high pitch noise as I slipped it. The best way I can describe it is a "zing", and it did not stop until I depressed the clutch again. Has only happened twice, both times in reverse, up a slight grade. Truck has 20k on it, and I baby it, anyone have any noises comming from their clutch:dontknow: