Finally got around to pulling my drums tonight, and there are cracks that are about the width of a dime from top to bottom on the shoes, is this an issue that would cause noise when breaking b/c i have this strange rubbing/grinding noise whenever braking, stopped using only e-brake and it still happened, thats what lead me to pulling the drums off....so thats what i found, still more than half life on the pads, but the huge cracks right down the middle are making me think about replacing them. What do you guys think?