The box starts both are cars backwards now. It first started them the right way then it just started spinning the wrong way! I bought the box on ebay so I can't return it! It was only used a few times and appered to be new! I took apart the motor and it looks fine. I think I'm gonna put a reversing switch in it so when it screws up I'll just hit the switch and it will spin the other way! But for now I will sit and wait for my Car parts to showup, Last time out the radio died and my car took off full out and smashed in to a parked car! The front ends all busted up.[]