Today for some reason my t-maxx won't move when you apply throttle. The spur gear is brand new and tight, but it still won't go. When I lift the front or back up and roll the 2 wheels on the ground the opposite ones turn along with the wheels on the floor, so I'm assuming that the tranny gears are fine. And when you apply throttle, the drive shafts just chatter or not move at all. NEED HELP I WANT TO GET THIS FIXED ASAP!!!!!!!!!!