I’m restoring a 2000 Sportsman 500. I replaced the transmission due to a crazy hole (shown in another post) and the machine has low miles, so I’m sure it sat for a while. Took it for the first ride and everything went fine at low speed, low throttle run. It runs like a dream actually. When I put some gas to it, the right side 4x4 front hub engaged even though AWD switch is off. When I stopped and went backwards and forwards a few times it disengaged. Riding it a little more, it stopped engaging going forward regardless of throttle, but still engages when backing up. I changed the hub drive fluid using Polaris fluid prior to ever taking it for a ride, but haven’t torn the hubs apart yet. The old fluid was dark, but didn’t really look that bad when it came out, and there WAS fluid in both hubs. Is this just a consequence of sitting for years and will fix itself the more I ride it, or should I take those hubs apart and check everything out?