Q: How to Remove and Replace a Twin-Piston Brake Caliper on 2009 Dodge Challenger?
A: Initially, look at the brake pads and change them if you find that they should be replaced when removing the rear-wheel-drive twin-piston brake caliper. Individually pull the pistons into the bores using either your hands or a C-clamp and keep a wooden block safe for the piston. Be careful when setting up the caliper that you do not pinch or damage the boots of the caliper guide pins. Set the caliper guide pins into the caliper adapter so they clear the caliper's mounting bosses, then place the caliper over the brake pads and on the caliper adapter. Be sure not to put the caliper guide pin bolts through each other during installation. Errant turning can cause permanent damage, so hold the guide pins in place as you tighten the guide pin bolts to 60 Nm (44 ft. lbs.). Following, place the banjo bolt on the hose fitting, using new washers on either side and tighten it to 50 Nm (37 ft. lbs.). Hold the tire in place and fit the wheel assembly before tightening the wheel mounting nuts to 150 Nm (110 ft. lbs.) for cars or 190 Nm (140 ft. lbs.) for police cars. Drop the car, then disconnect the brake pedal holding tool and link the negative battery cable to the battery terminal. Pump out the brake fluid from the area under repair and if the pedal doesn't feel right, operate a base bleed system. Then, take the vehicle for an extended road test, stopping every so often to help the brakes and the brake shoes seat correctly.