Rear Disc
Rear disc brakes are standard equipment. The sales code for this performance brake system is BR3. Each rear disc brake consists of the following:
- Caliper - single-piston, floating type.
- Caliper adapter.
- Shoe and lining assemblies (pads).
- Rotor - drum-in-hat type.
BR3 rear disc brakes are similar to and operate the same as standard PL brakes, but differ in the following ways. Like the standard PL with rear disc brakes, vehicles with BR3 rear disc brakes are equipped with a one piece caliper assembly that has a 1.42" (36 mm) piston and use a solid non-vented 10.63" (270 mm) drum-in-hat brake rotor. But unlike the standard PL, the BR3 rear disc brake caliper is painted Red. Also, the BR3 brake rotors can be easily identified by the recessed machined area near the hub center. See Fig 1.
To accommodate the additional width brake rotors, instead of using wider calipers, each rear brake shoe metal backing plate is .06" (1.5 mm) thinner than that of the standard PL with rear disc brakes. See Fig 2. When replacing brake shoes, often referred to as pads, only brake shoes meeting the Original Equipment Manufacturer (OEM) formulation (such as Mopar® replacement parts) should be used.
As with the standard PL rear disc brakes, the BR3 caliper adapter is mounted to the rear suspension spindle. The adapter is used to mount the disc brake caliper to the vehicle.