It's probably the intermediate axle where it goes into the passenger side CV. Mine was bad as well but I couldn't get the dealer to look at it. I still have them, they won't pull apart, at least not by hand.
While it's in the air, push up on the CV where they go together. Any movement at all and they're bad. No aftermarket parts available yet.
2010 KK Sport, Detoures Knucklebone & backbone, smittybilt XRC 10, rigid led lights, R/L sliders & rack, cb, EMT2, R/K 15x7, OME, JBA, mopar skids & hitch, headlight covers, 4.10's and TruTracs