But that just it, its not just in the sand its all the time everywhere, sand, dirt, grass. All the time!!! I have ran 16/39, 15/39, 16/41, and 15/41 it does it with all the gears. The only diffrents is that no soner than you shif into 2nd or 3rd its time to shift again. It is way to low of gear, it reves way to fast.