Glad its not cv's, I am so sick of cv's from my other rig (an isuzu).
One of the reasons I got the XJ was to be free of them.

Also, not crazy to ask about rocks Brass, my first instinct was to look at that and make sure no lug nuts were loose, but the sound is pretty metallic sounding, so no such luck. Calipers could be loose I guess, but weren't after I changed the pads. I will check when I have the wheels off again.