Rear wheels locking up while braking? You might need a new brake proportioning valve. When it comes to your vehicle’s braking system, several components are responsible for helping your vehicle come ...

The valve on the rear brakes of your Toyota Tacoma is often referred to as a proportioning valve or pressure reducing valve. Similar valves can be found on the rear of most Toyota trucks. The valve is ...

Brakes locking up without warning? Congratulations, you've just experienced the automotive equivalent of your pants getting caught on a doorknob. One minute you're cruising along, singing off-key to ...

Typical, medium-duty, hydraulic brake system with front discs (red circuit) and rear drums (green circuit). Boost, or assist (blue circuit), is provided by an engine-driven pump, although the power ...