BRAKE sounds as if draging and Grabs
 

Problem started after changing pads and shoes on 2000 F150. When starting to drive off or coming to a stop I hear a draging noie from the rear brakes. Also when coming to a stop sometimes the left rear wheel will loc-up the release as you come to a full stop.
I have changed the rear shoes 2-3 times , master cylinder, and power booster. I was thoinking it has something to do with the ABS
can anyone HELP