Why does the proportioning valve only work on rear brakes?
Why does the proportioning valve only work on rear brakes? Vehicles with drum brakes in the rear have much lower pressure for the drum brakes than the front disc brakes. This is why the proportioning valve only lets a particular amount of pressure through to the rear brakes. If you suspect there is an issue with your proportioning valve, check for the following symptom: How can you bypass a proportioning valve in a car? Perform the same brake fluid bleed on the rest of the wheels, continuing next with the left rear wheel, until all air is removed. Fill your...