I have a 2013 Teryx 4 750 4x4 and I am bothered by a metal on metal clicking noise in the differential when giving the UTV gas or letting off on gas. You can also hear it when going over bumps. I mentioned this to the dealer I bought it from and he let me drive a couple other Teryx's which did the exact same thing. Two of my friends just bought the same model and theirs has the same clicking noise. I am told it is "normal" and it does appear to be the norm, but I'd like to know if everyone is having the same issue. I fear that over time (I only have 23 hours on my UTV) this metal on metal wear will cause permanent damage. I find it hard to believe that Kawasaki would let this continue and not engineer the slop in the differential unit out. Any thoughts, suggestions or observations????