What are the proportioning valves on a Ford truck?
What are the proportioning valves on a Ford truck? Some of the more commonly-asked discussions on the Ford truck forums and groups revolves around the brake setups...specifically, proportioning valves...as well as several other brake-related components that are consistently misidentified as proportioning valves. When did Ford start using a disc brake proportioning valve? 3) Ford did not start installing a disc-brake proportioning valve in their trucks until 1973. Even the '68-'72 F250/350 with front disc brakes didn't have a proportioning valve. Their brake 'add-ons' include only a brake pressure differential valve and a stand-alone metering valve. Why is the proportioning valve...