I just fixed a confusing brake problem on the '65 Ranchero. The Granada disc brakes worked OK until the car had been driven for 10 or more miles, at which point they would get tight and start to drag, not releasing all the way. Not enough to warp the rotors, but they would drag and squeak a bit when warm. Car has done this for years, finally got too annoying. The Geo master cylinder does not have a residual pressure valve, so that wasn't it. I tried to crack open the bleeder screws on both calipers to release the pressure, but they still wouldn't release. So they must both be seized or sticking, right? Being that they were lifetime warranty from CSK back in the day, O'Reilly's ordered me two fresh reman Granada calipers. I put them on, and... they still won't release. What the cheese? Four in a row? Not possible. Gotta be something else. But what? So I replaced the rubber hoses. I didn't think there was anything wrong with the old hoses, but I did this conversion nearly 20 years ago so fresh hoses couldn't hurt, and at 12 bucks apiece, why not. I cracked open the bleeder screws on the new calipers, and they were still stuck, you could not turn the rotor by hand on either side. I unscrewed the rubber hose on one side to replace it, and the caliper immediately freed up and the rotor turned easily. ??? (maybe a few choice words were uttered) So I took a look inside the threaded hole where the hose lives, and saw the edge of the piston. The hose is at a right angle to the piston. After a break with a frosty beverage, (thinking juice) it came to me. The fitting on the hose is too long, and is jamming against the edge of the piston, preventing it from retracting. The fix? I ground off approximately 1/4" of material from the end of each hose fitting, leaving almost all of the threads - so no problem with safe thread engagement - and that was the solution. I've never heard of this problem before, and neither has the Google machine. A friend feels that the remanufacturer probably bores the calipers and uses an oversize piston, leading to the interference, but I think it is the hose manufacturer using a fitting that is too long. After getting the rotors turned at my favorite tire shop and a set of new semi-metallic pads, Job done. Strange problem, but strange problems are common with aftermarket parts.