Welcome matthewcriswell, I'm hoping for your sake it is the coupler, but it sounds like the rear diff went. Both issues are very common, one's a cheap fix (coupler), one isn't (diff). First thing to do is pull back the rubber boot, and see if your coupler has snapped, then you'll know. Why do either break? Unfortunately, Arctic Cat built the Wildcats with parts that were rated for quads, and quad horsepower. 2600 isn't a lot of miles, most diffs go in the 3500 mile range or so. First figure out where your damage is, if it's the coupler, no problem. If it's the diff, if I were you, I would PM (after 5 posts), Sand n Sea. His name is Robert, and he has done numerous diffs, and helped out many members (me included). There's also a sticky about diff repair too.