I just got a 1978 Ford Thunderbird (Jubilee Edition)about a month ago.
The front brakes started to grab just as I pulled onto my exit, then the car just wouldn't move, so I cut one of the flex lines to get the moving.
The next day I went & replaced both front calibers, pads & flex hoses, bled the system, the brakes worked fine for about 20 mins of testing & again they started to grab, so I checked the proportioning valve & found that the 2 (piston like valves)weren't working properly so I gutted the proportioning valve & they work for about a day. Now after about an hour of driving the brakes are starting to grab again. I don't know what else to do outside of doing a complete up grade which going to cost a couple of grand or just junking the T-Bird. Please help !
THIS IS A DIAGRAM FOR (IF I REMEMBER RIGHT) A 2004 F-150 TRUCK
HIS TRUCK WAS HAVING ISSUES WITH THE FRONT CALIPERS LOCKING TOO
I FOUND THIS DIAGRAM IN MITCHELL I FOR HIM----TURNED OUT SOMETHING WAS WRONG WITH HIS COMPUTER.......YOURS DOES NOT HAVE ONE
I JUST WANTED YOU TO UNDERSTAND....MY PIC IS A "GUIDE" (SHOWING A MEASURING TOOL) FOR WHAT NEEDS TO BE DONE. THE "ACORN NUT" IN THIS DIAGRAM IS THE "ADJUSTER"....YOU NEED TO FIND "YOUR MEASUREMENT" AND CHECK IT OUT