I drove a 2011 Teryx for two years, and really liked it. When the 2014 was introduced, I actually felt lust in my heart. I purchased one that had been driven about 300 miles - the owner found that it was not suited to the trails he was riding. Actually, neither the 2011 or 2014 is suited to NY trrails, so I ride exclusively in Northern New Hampshire, taking 3 trips a year.
Back to my point - I really love the 2014 Teryx. But the whinning and screaming coming from the clutch is more that annoying, it makes the machine unpleasant to ride after a few miles. I am trying to find a flat open road/trail/track around here to see if the problem is solved. I need to drive a constant 15mph or greater for a few miles to find out.
I don't have a noise coming from the rear end - yet - but it looks like a number of forum members do. I'll be paying attention to see what becomes of that problem. Surely someone will discover the source and publish a cure.
Good luck with yours.