I've got a Mazda B2300 pickup that's started making a grinding sound whenever I come to a stop. Braking at a high speed doesn't make any noise, but once I get under 25-30 MPH, the grinding sound gets progressively worse until the truck comes to a stop. What's the most probable cause of this?
I replaced the front brake pads on Saturday and discovered that one of them had worn completely down to the backing. I had to replace the rotor as well, since there was severe wear on the mating surface.