Is your brake lever have slack in it, it might need to be adjusted. I haven't had back breaks for a while but the fronts still work good.
Alside from openning the drain, you have can only get to it by taking it apart. You might try spraying some brake cleaner into the drain to see if anything alse comes out.How do you check for garbage in the rear drum without takin'
it all apart? I take my fronts apart reguarly, but i've never done
anything but adjust the rears.
I tryed that already and still nothing!Try ajusting them before you worry to much.