Ok, it has been about 3 months now that I have been working on this trying to figure it out. First I had that moan in reverse and then the continuous chirping from the rear. So I replaced the pads with Wagner Pads and then machined the rotors. No problems anymore. Slight chirping came back. Applied noise dampening. I jacked up the car to check the ability of the wheel to spin. It was horrible, the wheel would spin and then stick and then spin and then stick. It was in two main spots on every revolution. I replaced the rotor with the cheapest one available through Bumper to Bumper Auto Parts and lubed the slides, etc. The noise went away for a bit and then this morning the chirping was worse than ever. What the heck is going on? Do I have a bad caliper? Or could it be the metal backing plate? PLEASE HELP!
Mike