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ricardo hohl, Instructor
Category: Chrysler
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Experience:  ase master/factory certified/and automotive instructor
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2008 Town & Country: REAR brake pads..the piston to retract so you

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I'm replacing the REAR brake pads on my 2008 Town & Country. How do you get the piston to retract so you can get the new, thicker pads into place?
you will need a special tool call retractable brake tool . see picture. you can get this tool at any auto parts store or rent the tool at some auto parts store.graphic
here is the procedure on doing the rear brakes on your vehicle and the tool needed and also shows how to use it PLEASE PRINT OR COPY THIS PAGE RIGHT AWAY BEFORE IT GETS DILITED.


NOTE: Perform STEP 1 through STEP 6 on each side of vehicle to complete pad set installation, then proceed to STEP 7.

CAUTION: Anytime the brake rotor or brake pads are being replaced, the rear caliper piston must be seated (bottomed) to compensate for the new brake rotor or lining. Because the parking brake self-adjuster mechanism is attached to the piston, a special seating method is required. The only acceptable method is by rotating the piston back into the bore using Retractor, Special Tool 8807, as described below. Any other seating method will damage the self-adjuster mechanism.

  1. If necessary, seat (bottom) the caliper piston in the bore as follows:
    1. Assemble a 3/8 in. drive ratchet handle and an extension (3).
    2. Insert the extension through Special Tool 8807-1 (2).
    3. Place Special Tool 8807-2 (1) on the end of the extension.
    4. Insert lugs on Special Tool 8807-2 into notches in face of caliper piston (5).
    5. Thread the screw drive on 8807-1 down until it contacts the top of 8807-2 which is against the caliper piston. Do not over tighten the screw-drive. Damage to the piston can occur.
    6. Turn 8807-2 with the ratchet, rotating the piston in a clockwise direction until fully seated (bottomed) in the bore. It may be necessary to turn 8807-1 with 8807-2 to start the process of piston retraction.

  1. Make sure abutment shims (4) are in place on both upper and lower slide abutments of caliper adapter (3). NOTE: If the brake pads have a protective paper on the rear face of the brake pad plate, it must be removed before pad installation.
  2. Place the brake pads (2, 5) in the abutment shims (3) clipped into the disc brake caliper adapter bracket (3) as shown.

CAUTION: Use care when installing the caliper (2) onto the adapter bracket to avoid damaging the guide pin boots.

  1. Install the disc brake caliper (2) over the brake pads on the brake caliper adapter bracket. CAUTION: When removing or installing a caliper guide pin bolt, it is necessary to hold the guide pin stationary while turning the bolt. Hold the guide pin stationary using a wrench placed upon the pin's hex-shaped head.
  2. Align the caliper guide pin bolt holes with the adapter bracket. Install the upper and lower caliper guide pin bolts (1). Tighten the guide pin bolts to 35 Nm (26 ft. lbs.).

  1. Install tire and wheel assembly (1)See: Maintenance\Wheels and Tires\Service and Repair\Removal and Replacement\Tires/Wheels - Installation. Install and tighten wheel mounting nuts (3) to 135 Nm (100 ft. lbs.).
  2. Lower vehicle.
  3. Pump brake pedal several times to ensure vehicle has a firm brake pedal before moving vehicle.
  4. Check and adjust brake fluid level as necessary.
  5. Road test vehicle and make several stops to wear off any foreign material on brakes and to seat brake pads.



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Customer: replied 6 years ago.
This makes sense, although I did use a hydraulic spreader to apply pressure to the piston, and it didn't help. Maybe I wasn't pushing straight enough. The tool you suggest looks like it would push straight against the piston.

Thanks, Tim.
it will push and turn the piston to go in this calipers have a piston that needs to be turn and press at the same time to get it to go in, and this tool is especially for that.
thank you.

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