I've been reading the posts on the Matador brake caliper problem, and I have a similar one. My '67 Rogue was an original 4 piston disc brake car, and several years ago I replaced that setup with the big 3" single piston jobs from a '75 Matador. Ever since then, the front calipers seem to hang up. I just installed new calipers and pads, the brake hoses are good, and the master cylinder was done and resleeved a few years ago. It's the original 4 piston master cylinder. Anyone have any ideas?
Yeah, with the wheel off, turn the rotor and bonk the caliper back and forth with a rubber mallet. If you can adjust the position of the caliper so that it doesn't drag, it's just sticking on the caliper brackets. Remove, file, sand, smooth the surfaces, a little bit of grease (mostly to keep water out). Maybe the wedge lock is too tight...