This started recently. If I turn slowly there is no noise. If I go quickly it sounds like a hum made a rubber wheel on a thin plate. The wheel on the road need be turned only about 20 degrees to generate the noise. I jacked up the car and there is no play at all in the wheel bearings. I crawled underneath and saw only one likely thing. There is an arm, that the spring rests on, from the wheel to the chassis and it has a bolt (about 5/8" diameter) passing through a hub on the end of the arm and then through two plates attached to the chassis. The ends of the section between the two plates each has a black rubber or plastic gasket or seal or similar and one of them is breaking up. This may have nothing to do with the problem but it was the only thing I could see that wasn't normal.
Wish this system would allow real sketches. Doing them via text is a real chore.
Help appreciated.
rf