I have the same problem, but for some reason my breaks squeak whem im breaking in reverse at low speeds more than when im in drive at low speeds.

but i didnt lube anything when i put my new pads and rotors in. ill disassemble and lube the pins and back of the pads. i also have these padded plates that fit in behind the pads that i didnt install when i got them because there werent any when i took the old ones out.

i think i need to install them and lube and see if that helps