Viper GTS V10-8.0L VIN E (1999)
Brake Proportioning/Combination Valve: Testing and Inspection
If premature rear wheel skid occurs on hard brake application, it could be an indication that a malfunction has occurred with the proportioning valve
portion of the combination valve.
To test the proportioning valve when the rear wheels of the vehicle slide first, leave the front brakes tubes connected to the combination valve, and
proceed to test the proportioning valve for the rear brakes as follows:
Proportioning Valve Pressure Specifications
1. Install one gauge and (TEE) from Special Tool C-4007-A between the brake line from the master cylinder secondary port and the combination
valve.
2. Install the second gauge from Special Tool C-4007-A to the rear brake outlet port on the combination. Gauge is to be attached to the combination
valve using an adapter tube made from a short piece of brake tube and (1) 3/8 x 24 tube nut, and (1) M10 x 1 tube nut. Connect the hose to the
valve. Bleed the hose and gauge.
Test Connections For Premature Rear Wheel Skidding
3. Have a helper exert pressure on the brake pedal (holding pressure) to get a reading on the valve inlet gauge and check the reading on the outlet
gauge. If the inlet and outlet pressures do not agree with the values on the following chart, replace the valve.
