On the rear brakes there is a "star adjuster" and as mentioned in the above post there is a tool used to move the shoes closer to the drum...there usually a small cut out on the drum to allow access to the star adjuster without having to remove the drum..personally tho the last thing i'd want is a locking rear wheel on ice...just pretend u have rear wheel ABS...as most of your stopping power comes from the front brakes i think something like 70%
