Just bought a 2017 Pioneer 500 a couple weeks ago. It had only 23 hours and 115 miles on it. Put a Viper windshield on it which works great! I have read that owners talked about rear differential noise and some have had metal particles in the oil when they drained it. It finally warmed up here in Wisconsin to 28 degrees this weekend and drove it with wife for about 10 miles. I drained the rear diff. when we got home and am happy to report that the oil was pristine! Put synthetic gear oil in. I am very pleased with this machine. Saved $2000 by buying this used machine. I have winch and some led lights ordered.