Read my entire post before responding. Took my Sportsman out today and realized its only spinning the left front tire in the front in 4wd. Right front does nothing, well doesn't drive at all. I know I probably have to clean out the hub assembly and possibly replace some sensors, but what I don't get is, the tire seems to be locking up. When going through the mud, I would actually get tossed sideways. I noticed too through a mud hole the tire didn't move. Also you can fell the handle bars pulling to the left pretty hard. I know this seems to be a common problem on these machines. My dads 03 is only 3wd at times. Nevrr heard of the tire locking up though. I know it shouldn't have anything to do with it,, but everything started going wronf when I changed out a bent A arm and swapped it with a piar I had from a 2000 Sportsman. I cross reference the parts and they were the same. Can anyone help me out here??