BenK wrote:
Another thing to check...the flex hoses to the caliper
Check if they have age cracks or anykind of nick/crack that might allow road salts to get to the spiral steel wire that keeps the hose from expanding
IIRC, rust has about 2 times the volume as steel, so it will pinch off the hose and NOT release all of the hydraulic pressure after you release the brake pedal.
That will leave enough PSI to keep the pads pushed up against the rotor
I've seen that happen. Some hoses go thru a steel bracket that rusts and pinches the hose. I noticed that the OP said in his original post that he replaced hoses, so I didn't mention that.
Some motorhomes had a rash of problems with phenolic caliper pistons that absorbed moisture and swelled. I don't know if this is what the OP has on his Ford.