Disc/Drum Proportioning Valve, 66-86 Ford Bronco SKU: 303702

Disc Brake Proportioning Valve | Disc/Drum | 1966-86 Ford Bronco

This Disc/Drum Brake Proportioning Valve is essential for achieving balanced brake pressure in vehicles with front disc and rear drum brakes. Engineered with an integrated metering valve, it properly delays front brake engagement to ensure smooth, even stopping and optimal brake performance in mixed brake systems.

Each valve includes mounting hardware and an electric plug to wire into your brake warning light system, which alerts you if there’s a pressure imbalance between front and rear circuits—a possible sign of a line, caliper, or wheel cylinder issue.

This valve will fit the factory-style mounting bracket as found on 1976-77 Ford Broncos. For a hassle-free install, pair it with our bleeder tool and fitting kit (sold separately) that includes adapters for use with common hard lines.

Pro Tip: When wiring the brake warning switch to the factory early Bronco brake warning light, you will notice the valve has a single wire and the light has two wires leading to it. Simply splice the two factory wires together with the new single wire from the valve and everything will work just as it should.

• Combination Valve: Regulates pressure front to rear, improving braking balance and safety.

• Includes Hardware & Plug: Comes with mounting hardware and a plug for brake warning light wiring.

• Factory Fitment: Will fit the OEM bracket on 1976-77 Ford Bronco (bracket sold separately).

• Supports Safety Monitoring: Activates brake warning light when detecting front/rear pressure differences.

If your vehicle has disc brakes on all four wheels, please see our Disc/Disc Prop Valve, which is specifically calibrated for 4-wheel disc setups and does not include a metering valve. 

Stop safer and smarter - this proportioning valve is engineered for classic rides with disc/drum setups - keep your brakes balanced and responsive.