Hey guys just got my xb a few days ago broke it in treated it like a baby when i noticed yesterday at some points it would start jerking a bit thought nothing of it when i came around the corner from my house it wouldnt go anywhere if i gave it gas, turned off completely moved the buggy slowly and i heard crackling in the gear mesh area , took that off and the gear attached to my engine was completely destroyed 4 teeth completely gone and the rest of it was half gone on 1 side. None of my other gears are bad just that one thank god, any idea how..? Kinda puzzled maybe a factory defect?