Rear Discs

Rear disc brakes are optional equipment on some models of these vehicles. The rear disc brakes are similar to the front disc brakes, however, there are several distinctive features that require different service procedures. Each rear disc brake consists of the following:

• Caliper - single-piston, floating type.
• Caliper adapter.
• Shoe and lining assemblies.
• Rotor - drum-in-hat type.

Vehicles are equipped with one-piece caliper assembly that has 1.42" (36 mm) piston and uses a non-vented 10.63" (270 mm) brake rotor. The caliper assembly for all applications floats on rubber bushings using internal metal sleeves that are attached to the adapter using threaded guide pin bolts. The adapter is used to mounted the disc brake caliper to the vehicle. The adapter has 2 machined abutments which are used to position and align the caliper and brake shoes for movement inboard and outboard. When brake shoes, sometimes referred to as pads, are replaced, only brake shoes meeting the Original Equipment Manufacturer (OEM) formulation (such as Mopar(R) replacement parts) should be used. The adapter also mounts the parking brake shoes and actuating cables to the vehicle. All vehicles equipped with rear disc brakes have a small duo-servo drum brake mounted to the caliper adapter. This is part of the parking brake system. This vehicle has an optional performance brake system. The sale code for this system is BR4. Although similar in appearance to the BRT (disc/disc combination), this system features heavy duty wheel brake components. BR4 rear disc brakes utilize brake rotors that have a pad contact surface approximately 3 mm thicker. To accommodate that additional width, instead of using wider as front brakes do, each rear brake shoe metal backing plate is 1.5 mm thinner than that of the standard BRT rear disc brakes. See Fig 1 . BR4 brake rotors can easily identified by the recessed machined area near the hub center. See Fig 2 .