I was driving it on a dry lake bed going around 45mph and it starting bogging down like a carbureted atv and then i slowed down to a stop and it shut off. I tried to start it in park and it started and tried to put in gear and it grined the gears a bunch and it stalled out. Then i tried again and put it fast into gear and just grinded gears but stalled out after i let go of the brake pedal. Anyone know what the problem can be?