there is not a slave cylinder for the brake system, the cylinders are actually mounted on the wheels as a wheel cylinder (on the rears) or calipers up front
as far as MCs go, parts from autozone like that suck, and are defective about 85% of the time..... its also very possible during bleeding of hte new mc that you blew it out, it happens quite frequently on the mcs from az and hte like
