I replaced my rear brake pads and rotors last weekend. Ever since, I've heard an intermittent scratching sound that from my position in the drivers seat, seems to be coming from the right rear door area. It's most noticeable when I engine brake at low RPMs in second gear. I thought I had maybe put the pad wear indicator on backwards, creating the scratching sound, but when I took it into the shop to get the fluid flushed (and refilled with ATE Superblue!), they said everything checked out brakes-wise, and that I had done a great job, so now I'm not sure where to check. (I did tell them about the sound, but they couldn't reproduce it.)
I don't hear it under braking, or when the car is driving smoothly, only once I lift off the throttle in the lower gears. It's sort of a metal-on-metal sound, noticeable, but not "holy crap, I need to pull over" loud. Turning left or right doesn't seem to affect it much, and pushing on the suspension when the car is still won't do anything either.
I'll try to get a video, but it's really hard to pinpoint, so it might take awhile.
Any ideas would be great, thanks!