Has anyone experienced a loud clunking noise from transmission when running the 2015 Polaris XP 1000 Sportsman at low speed? Recently had serviced, Polaris tried new transmission, clutch, belt and other drive parts and could not correct. Polaris Factory stated noise is normal for the XP 1000. My concern, if normal why did Polaris factory offer new transmission and other parts? Dealer representative has expressed concern…Thoughts or others with same issue?