hey guys, hopefully i can get some help with this one. so as the title states, 91 F350, 7.5, auto, 4x4, and the brakes are sticking. this has been a project truck that i need up and running soon.since ive had the truck, the rear antilock light has been on. a while ago, i had lost all brake pressure while i was towing, brought the truck back home, and replaced the master cylinder and booster. Doing this had given me most of my brake pressure back, and has even turned the rear antilock light off, however, now the brakes are sticking for about an extra 1.5-2 seconds after releasing the pedal. what is your thoughts on what is causing this? what is my next move? thank you guys so much for any help in advance.

 

Have you replaced ALL the rubber lines lately? Those can rot from the inside, making little "check valves" inside the line holding pressure after you let off the pedal.