Ok guys I have a FORD question... I know.. I know... I have a 99 F-150 that is locking up on the rear brakes. I've checked the front brakes and they are working correctly. The Wheel Cylinders are working correctly on both sides(drums). All will bleed just like they should. The passenger side rear will lay a good line of rubber just by tapping the brakes and the driver side is a choppy skid. These are kicking in before the fronts do. Any thoughts?