After securely blocking the front tires, place the rear axle on jackstands and pop off the rear tires and wheels. Remember that neither the transmission nor the parking brake is restraining the vehicle because the rear axle is in the air. The old drums need to come off next, which can cause some grief on older systems. The brake shoes sometimes need to be retracted from the drum by turning the adjuster screw inside the assembly with a brake spoon or a screwdriver. Keep some penetrating oil handy also, as the center of the drum may be rusted onto the index circle of the axleshaft.