REMOVAL & INSTALLATION
See Figures 1 and 2
Two brake pressure differential valves are located on the brake master cylinder. When you apply the brake pedal, full rear brake circuit pressure passes through the differential valves to the rear brakes. This creates balanced braking between the front and rear wheels and maintains a balanced hydraulic pressure at the rear wheels.
A scan tool is absolutely necessary to bleed the brake hydraulic system on 1997-99 models equipped with an Anti-lock Brake System (ABS). If your vehicle is equipped with ABS, be sure to refer to the ABS bleeding procedures in this section before performing any work on your vehicle's brake hydraulic system.
The brake pressure differential valve is used control hydraulic pressure to the rear brakes.
- Unfasten the brake line-to-brake pressure differential valve fittings.
- Disconnect the brake lines from the valves and plug the lines to avoid leakage and contamination.
- Unscrew the valves, then remove the valves and if equipped, the O-rings. Discard the O-rings.
- If equipped, install new O-rings and the valves Tighten the valves to 33-40 ft. lbs. (44-54 Nm).
- Attach the brake lines to the valves and tighten the fittings to10-16 ft. lbs. (13-22 Nm).
- Bleed the brake system.