Hi, I have a my Arma Kraton V1 for 1 year now and was just recently driving it around my yard and all of the sudden my car just slows down and sounds like gears are grinding but the tires spin very slow when I lift the car up. I am kind of new into rc so I do not know what it could be. I looked at the pinion and spur and did not see any stripped teeth. Any suggestions what it could be??