Good evening, ive got a problem with my Rocky brakes where each time i brake the pedal becomes firmer and firmer until it cannot be depressed and the truck can hardly move! Previous owner said he had replaced the front pads, could this have anything to do with it? What should I look at to try and rectify this problem? I had thought about stripping the brake calipers and rebuilding but nopt sure if this would actually make any difference. Any help/tips appreciated, thanks.