I have a about 3500 miles on my Z, and I just started to hear this high pitched clicking, metal grinding noise. I think it is coming from the steering column, but I am not sure, I have not heard the noise for that long, and as always it never shows up while the radio is off and I am listening for it. It seems to happen ever so often when I hit a bump in the road, or when I turn, or accelerate hard, but not always. I was thinking that if could be something that was attached to the steering column maybe up by the speed/tach/fuel gauge. I always have my tilt wheel in the highest positions (if that makes a difference). Has anyone had this problem, or know what it might be?