ok so i just joined the forum today and found tons of good info already! but i just picked up my brand new 2015 rzr 900 S white lightning last weekend,have only put 16 hours on it and its making a god awful clunking noise in the rear drive train, only notice it at low speeds and turning. cant seem to find any info on the issue so im hoping someone can shine some light on it! its going back to the dealer tomorrow to get checked out since i bought the 54 month warrenty, thanks alot in advance!