I just had problems with my wife's '05 42K miles and the rears were shot and all four pads almost metal-to-metal. The fronts look brand new.
There is a tool ($9 and change) that you need to retract the piston. I bought it at a part store where I bought the pads. The same shop would not turn the rotors as they said they were shot and wanted me to but them for $80 plus each (Fords were $125)
I took them to a friend's shop that has a brake lathe and he turned them.
The tool you need will "turn" the piston back into the bore. You will see two notches on the piston and the tool "grabs" it there and you turn it back in.
The brakes now feel better than new and a slight vibration that the van had went away.
I did have to purge the line to get some air out of it, and the reservour is a pain to get to. Bad design!
Good luck! | 
