After getting my gear box rewired I plugged in my battery and motor to make sure all was well before reassembling , I ran the motor out of the gearbox and it worked fine for about 5 seconds then just sort of died. Every time I pull the trigger now it stutters and sparks a little and moves a little before stopping entirely. As I don't want to replace the motor without knowing for certain the cause I was wondering if any one had any suggestions.