I would inspect the right front or right rear which ever one you did brake pads on. Look closely at anything touching the rotor as there should be signs of scrapping on the parts.
Having the rotors turned or replaced before installing the brake pads is ideal for new pads. Because it provides a flat surface for the new flat brake pads to seat into. I would recommend turning or replacing (replacement is better because you wouldn't have to quality check the rotor resurfacing job you just paid for) the next time you replace brake pads.
Those thin piece of metal help to reduce noise whether on the back of the brake pads or on the end where they sit in the caliper bracket. Those could help.
Don't put any lube onto the brake pads of any kind. Modern brake pads and brake rotors are designed to have a clean (oil free) surface.
If you don't find anything contacting or out of place it may just be the quality of brake pads installed on the vehicle.
From your description it sound like something is touching the rotor or something is missing.
Monday, February 9th, 2015 AT 10:04 PM