I had a problem with my Tmaxx not moving. A couple people said it was the slipper clutch. After replacing the clutch and tightning the nut the truck still wouldn't move. So I dissasembled the transmission and found a broken pin. The pin went in the primary gear, so after spending 6 bucks on a new gear and pin the truck runs fine, but, now I have a high pitched whine when driving. Truck runs great and stops fine. Any suggestions about the whine?