On my way home yesterday my LS developed a clunk. I could only hear it at low speeds when I started turning the steering wheel left or right. It clunks just off center and then I don't hear anything else. I can hear or feel it at any speeds over 5 mph. I looked under the car when I got home and didn't notice anything unusual. My power steering fluid level has not decreased since I changed it about 6 months ago. There is some power steering fluid dripping off the left tie rod boot but, it is a very slow drip. Does anyone know what may be causing this low speed clunk? In the last six months I have replaced outer tie rods, upper and lower ball joints and all suspension bushings.