so i was just out running my truck in the leaves and it started making a godawful sound. From what I can tell its coming from inside the piece behind the spur gear that houses the gears that turn the back wheels?? I took off the motor and spur to see if something came loose in there but nothing was . The picture is where I'm thinking. The piece right in the middle. Anyone know anything? Or any tips? Truck only 2 weeks old..