Hydraulic/Mechanical - Description - Rear Disc Brakes

REAR DISC BRAKES





Rear disc brakes are optional equipment on some models of this vehicle. 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 components:

- Caliper - single-piston, floating type (1)
- Caliper adapter (3)
- Pads (Shoe and lining)
- Rotor - drum-in-hat type (8)





Vehicles are equipped with a one piece caliper assembly that has a 36 mm (1.42 in.) piston (3) and uses a solid non-vented 270 mm (10.63 in.) brake rotor.

The caliper assembly for all applications floats on rubber bushings (5) using internal metal sleeves (6) that are attached to the adapter using threaded guide pin bolts (7).

When the brake pads are replaced, only brake pads meeting the original equipment manufacturer (OEM) formulation (such as Mopar(R) replacement parts) should be used.





The brake caliper adapter (3) is mounted through the rear suspension spindle (6) to the rear axle. The adapter is used to mount the disc brake caliper to the vehicle. It has two machined abutments which are used to position and align the caliper and brake pads for movement inboard and outboard.

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. Description and Operation





This vehicle has an optional performance brake system. The sales code for this system is BR4. Although similar in appearance to the BRT rear disc brakes, this system features heavy duty wheel brake components. BR4 rear disc brakes utilize brake rotors (4) that have a pad contact surface approximately 3 mm thicker (3) than the BRT rotor (2). BR4 brake rotors can be easily identified by the recessed machined area (5) near the hub center.





To accommodate that additional width of the BRT rotor, instead of using wider calipers as the front brakes do, each BR4 rear brake pad metal backing plate is 1.5 mm thinner (3) than that of the standard BRT rear disc brake pad (4).

NOTE: Special care should be taken to assure that the correct brake shoes are used only with the correct rotor.