Compress rear brake calipers on 2004 freestar

You could try striping and cleaning the caliper then rebuilding it if you are able to get a kit to replace the rubber parts and pistons that are damaged

Here's a link,did you do this when changing pads,may need t0 do,also here's a link,it says to

1. Install new anti-wear slippers on the rail abutments by snapping them in place.Here's the other link.

Either the master cylinder brake lines or hoses are defective.
Start at the master and see where fluid stops circulating.
Probably in the rubber hoses going to caliper.

The rear disk brake piston does not compress back into the caliper, it has notces on the caliper piston that a tool fits into and the caliper piston is actually turned or screwed back into the caliper, and a notch in the piston must also be aligned to fit the the small protrusion from the backing plate of the inner brake pad.

The brake tool can be obtained from most auto part stores, and it is usually square with protrusions sticking out from the sides in different patterns to fit various caliper pistons, and it usually attaches to a 3/8" drive extension and ratchet.

Do not compress this type of caliper piston because the caliper can damaged.

There are two stlyes of calipers for the rears. One is ratcheting so the piston has to be turned back to colaspe. The other type compresses with a C clamp. If a large retaining spring is on the inner part of the caliper you have the ratcheting type. A brake cable will attach to the spring as well. If not it will compress instead

Anti-rattle hardware missing on rear brakes or worn caliper guide pins.

There is a tool that you can buy or rent at the parts house that you can connect to a hand tool EG: 3/8 rachet to use with a tool to compress the caliper while you turn the rachet. You will see some raised teeth on the calliper piston for the tool to bite on. Since the rear brake is used to lock the parking brake it has to have a self adjust to compensate for the brake pad wear. EG: Old school drum brakes adjust when you back up depressing the brakes and letting off while the vehicle is rolling allows for the adjuster to reset the brake shoe clearance.

Before you try and push on the caliper to hard stop..When compressing the caliper it needs to be rotated at the same time it is being press in.Turn clock and push in at the same time..Hope this helps you and take your time..Have a great day

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

If the problem is with the front caliper replace it. If the problem is with the rear caliper you need a tool that will compress the piston back into the caliper by turning it. Most auto parts stores will have a caliper tool for this.

new calipers now. and i had to replace both discs. Ford Freestar is renowned for it's rear brakes wearing prematurely.

anyway, after forcing banging, and utterly destroying two heavy duty c-clamps, i check forums and found you MUST rent a tool from an auto parts store (mine was free loaner from Checker, just had to give them $80 and bring it back undamagaed, they give you back 100% back). Anyway the tool twists the calipers as it pushes them back. you cannot just force the calipers back with straight force.