guys having a problems with my rear brake my a horrible sound when breaking, it's not the normal squeel you may get if you had wet / oily pads. They the brake works fine its just when it engages it makes a really loud noise.
Tried the following:
re-aligning the brake by loosening the caliper and pressing the brake and then re-tighten.
Re-alligning by sight
sanded down the disc and pad
replaced pad
replaced disc and pad together.
Replaced wheel
Still does it

does it wet and dry and at any speed.
Ideas before i bite the bullet and either buy a new brake or take it to the shop?