Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.

1. Without disconnecting the electrical connectors, remove the transmission control module (TCM) if equipped from the bracket and position aside on top of the engine. Refer to Transmission Control Module Replacement in Automatic Transmission - VT25-E.



2. Place a shop towel under the proportioning valve assembly to catch any brake fluid loss.

Important: Prior to disconnecting the brake pipes from the proportioning valve assembly, note the locations of the brake pipes to the valve assembly, to aid during installation.

3. Disconnect the caliper and wheel cylinder brake pipes from the proportioning valve assembly.
4. Cap or plug the brake pipe ends to prevent brake fluid loss and contamination.
5. Disconnect the master cylinder brake pipes from the proportioning valve assembly.
6. Cap or plug the brake pipe ends to prevent brake fluid loss and contamination.
7. If the proportioning valve is to be reused, plug the ports to prevent brake fluid loss and contamination.



8. Remove the proportioning valve mounting bolts.

Important: Do not exert excessive force on the brake pipes.

9. Remove the proportioning valve from the vehicle while carefully repositioning the brake pipes.

1. Install the proportioning valve assembly to the vehicle.

Notice: Refer to Fastener Notice in the Preface section.

2. Install the proportioning valve assembly bracket mounting bolts.

Tighten
Tighten the bolts to 12 N·m (9 lb ft).




3. Remove the plugs from the proportioning valve assembly ports.
4. Remove the caps or plugs from the master cylinder brake pipe ends.
5. Connect the master cylinder brake pipes to the proportioning valve assembly.
6. Tighten the brake pipe fittings at the proportioning valve assembly.

Tighten
Tighten the fittings to 18 N·m (13 lb ft).

7. Remove the caps or plugs from the caliper and wheel cylinder brake pipe ends.
8. Connect the caliper and wheel cylinder brake pipes to the proportioning valve assembly.
9. Tighten the brake pipe fittings at the proportioning valve assembly.

Tighten
Tighten the fittings to 18 N·m (13 lb ft).

10. Remove the shop towel and discard into an approved container.



11. Reposition the TCM if equipped to the bracket. Refer to Transmission Control Module Replacement in Automatic Transmission - VT25-E.
12. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding .