OK, I'm back. Here is the scoop again. Upon partial or light to medium braking I experience and medium pitch moan from the rear brakes at any speed. If I brake hard it stops but this also forces everyone in the car forward. It does have ABS. I have tried shims and the rubber stop squeal stuff. It lasts briefly then comes back. The pads are relatively new (I've had the car 2 months). Before I try a different set of pads should I look at something else? Could this be ABS related?

Thanks in advance