I was just out riding, sled was running great until I went over a tiny little snow plow berm and it switched into reverse and died, not sure if I inadvertently hit the reverse button or what. When I started it up again it seemed to be rapidly shifting between forward and reverse, if I gave it a little gas it would stall. I could hold the reverse button in and it would stop rapidly shifting between F and R so I was able to get home, the engine seems to be running fine as long as I hold the reverse button in. Bad switch or something bigger? Where do I start to diagnose the problem? Thanks!