Any help that anyone can offer would be greatly appreciated. I was out on my o3 Sportsman 400 today. I have been having some problems with the four wheel drive. When engaged the front right wheel would not drive. The other three would be powered, but not the front right. Later in the day, sometimes the four wheel drive would work and then sometimes it would not. Now it will not work at all. The drive shaft going to the front gearcase is spinning. So I am not sure if this is a problem with the gearcase, the hubs or the electrical switch and wiring to control the four wheel drive system. Any help would be appreciated. Thanks.