Just got NS and I have 300 miles on it. I ride in Montana mountains and in low range, rear lock going down steep inclines, the clutch does this rhythmic lunging thing and then locks up the rear wheels putting the machine into a slide until I hit the gas or brake to stop. Service Manager and salesman have never heard of the “new” Polaris clutching doing this. Anybody having this problem? Does not do it in high range or low range on gentle slopes-30 degrees or less. 45 degrees or steeper is a problem.