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So I was attempting to do a simple brake job on a 2009 town and country for a friend and I could not believe how hard the back brakes were. The issue I was having was not being able to push the piston back in the caliper. I tried a C-clamp, prying it, loosening the bleeder screw then trying both again. Nothing. That piston was not moving. I was scratching my head on this one. So I thought Id do a little research.... Comes to find out that modern technology has changed a few things. The back brakes are disc brakes on this van but for a safety feature when the hydraulic system fails, the mechanical emergency brakes still work. How the mechanical brakes works is when the emergency brakes are applied, the pedal pulls the cable which then TURNS and PUSHES the piston outward to compress the brakes. So to re-compress the piston, you need a special calpier piston tool you can get from the auto part store that turns and pushes the piston back in. I have NEVER heard of this before and thought id share with you guys.