HELLO GROUP THIS IS MY FIRST POST .PROBLEM CHILD 85 CHEV K-10, CUSTOMER WOULD LIKE THE REAR BRAKES TO LOCK UP. HAVE REPLACED MASTER, REAR WHEEL CYL, SHOES, HARDWARE, DRUMS, REAR BRAKE LINES,FRONT PADS, CALIPERS, ROTORS,PORPORTIONING VALVE, POWER BLED SYSTEM M... Login to read more.