Biggest reason for this has been me not making sure it is securely in first to begin with. As simple as this may sound, think about it...it is very easy to have it only partially in gear, the neutral light is out, but there is just not enough contact to withstand all the torque, and, POP...out of first it comes. Make sure your clutch is properly adjusted and make sure she gets a good lock into 1st. Just my $.02 worth, but it works for me.