Jeep Wrangler JK Brake Job 2007-2018

2007-2018 Jeep Wrangler JK Brake Job

The main problems technicians will encounter are pulsation and judder from the front brakes.

This popular Jeep has been on the roads for almost 70 years, starting off as the CJ (Civilian Jeep) and changing names to the Wrangler in the late 1980s. The great thing about performing a brake job on a front solid axle Jeep is noise complaints hardly ever happen. The mass of the axle absorbs noise and vibration.

The main problems you will encounter are pulsation and judder from the front brakes. The cause of the problem is excessive lateral runout when new rotors are installed. The cause is usually runout in the flange caused by an impact or corrosion amplified by the new rotors. The runout specification is less than .002”.

The Jeep has electronic brake distribution controlling the brake bias. The rear brake pads will wear at the same rate as the front for some drivers. The system helps to prevent nose dive during stops for traffic lights and stop signs. 

Parking Brake Adjustment

The rear brakes use a drum-in-hat parking brake. Adjustments can be made to the equalizer bar to change the amount of movement of the lever. Removal of the center console is required. The brake lever is locked out with a screwdriver or drift.

Adjustments to the parking brake drums at the wheels can be made with the rotor on or off.

1. Be sure the parking brake lever is fully released.

2. Raise vehicle so rear wheels can be rotated freely.

3. Remove plug from each access hole in brake support plates.

4. Loosen parking brake cable adjustment nut until there is slack in front cable.

5. Insert adjusting tool through support plate access hole and engage tool in teeth of adjusting screw’s star wheel.

6. Rotate adjuster screw star wheel (move tool handle upward) until slight drag can be felt when the wheel is rotated.

7. Push and hold adjuster lever away from the star wheel with a thin screwdriver.

8. Back off adjuster screw star wheel until brake drag is eliminated.

9. Repeat adjustment at the opposite wheel. Be sure adjustment is equal at both wheels.

10. Install support plate access hole plugs.

11. Adjust parking brake cable and lower vehicle.

12. Depress park brake lever and make sure park brakes hold the vehicle stationary.

13. Release park brake lever.

Bleeding 

The brakes can be bled with a power bleeder. Jeep recommends a pressure between 15-20 psi. Manual or two-person bleeding is possible, just take care not to bottom out the dedal and master cylinder. Damage to the seals can occur on higher-mileage Wranglers.

You May Also Like

Adjusting Parking Brakes

You should never estimate when it comes to parking brake adjustments.

The parking or emergency brake has to perform two distinct jobs. First, it must be able to hold the vehicle on an incline. Second, it must be able to stop a vehicle under a specific distance if the hydraulic brakes have failed. These standards are set by the Department of Transportation (DOT), and the kicker is these standards must be met with the force applied by a little old lady. But, over time, the cables can stretch and the friction materials change their length and thickness, which is why adjustments to the system are required.

Charging More for Brake Jobs

Here’s why charging more for brake jobs keeps customers coming back.

Servicing Multi-Piston Brake Calipers

Caliper replacement may be necessary in high-mileage vehicles because of fluid leaks or because the calipers are sticking.

Wheel Bearings

Higher quality wheel bearings use higher quality steel that is properly heat treated.

EV Brake Jobs

With these vehicles, the major aggravation for shops is brake noise and uneven brake pad wear.

Other Posts

Replacing Master Cylinders

The most common problems that occur in the master cylinder are wear in the piston bore and piston seal failure.

Brake Fluid 101: What Does Brake Fluid Do? What is the Difference Between DOT 3 vs. DOT 4?

When you think about the braking system of a vehicle, you probably think about the major parts you see when removing the wheel: brake pads, rotors, calipers and maybe hydraulics. However, one of the most important parts of the system isn’t visible: brake fluid. Brake fluid comes in several formulations for different applications and plays

Brake Pad Diagnostics

Worn brake pads can tell you a lot about the entire brake system and keep new components from suffering the same fate.

Understanding Passive Wheel Speed Sensor Operation

Passive types of wheel speed sensors are still used in many applications so understanding their operation is important.