LDMINDA Proportioning Valve PV2 Brass for Disc/Drum Brakes — Direct-Fit OEM Replacement 172-1353

The LDMINDA PV2 is a solid-brass combination proportioning valve that balances brake pressure for vehicles with front disc and rear drum brakes, replacing GM part 172-1353/25509419.

This heavy-duty PV2 valve is engineered as a direct-fit replacement for older OEM combination valves used on many classic Chevrolet, GM and Ford vehicles when converting or maintaining disc/drum braking systems. Built from solid brass to resist corrosion and wear, it replicates the original AC Delco-style design and works with dual-reservoir master cylinders to regulate fluid flow, preserve residual pressure and provide a dependable warning path in case of system failure.

How does the PV2 valve affect braking balance during a drum-to-disc upgrade?

The PV2 proportioning valve modulates rear brake line pressure so the front disc brakes engage before the rear drums in heavy stops, helping prevent rear-wheel lockup. It also preserves a small residual pressure to improve pedal feel and maintain drum shoe clearance.

• Brass body resists corrosion for consistent valve function.
• Includes residual pressure feature for reliable pedal response.
• Designed to match OEM flow characteristics for disc/drum setups.

Will this valve fit my classic GM Chevy or Ford truck?

The PV2 is a universal replacement for many dual-reservoir master cylinder systems and is specifically specified to replace GM part numbers like 172-1353 and 25509419. Compatibility is high with classic Chevrolet, GM and many Ford models that used combination proportioning valves for front disc/rear drum brakes.

• Replaces manufacturer part numbers 172-1353 and 25509419.
• Works with most OEM dual-reservoir master cylinders.
• Brake line port sizes commonly match 1/2" and 7/16" fittings.

What are the construction and durability features of this proportioning valve?

The valve is machined from solid brass for long life and reliability under brake-system conditions. LDMINDA tests components to meet OEM-style specifications so the valve performs consistently with original equipment over time.

• Solid brass construction to resist rust and wear.
• Exact AC Delco-style architecture for fit and function.
• Manufactured and tested to meet common OEM tolerances.

How do I install and what should I check after fitting the PV2 valve?

Installation follows standard brake-line replacement procedures and requires proper line fittings and torqueing to prevent leaks. After installation, bleed the brake system and verify pedal firmness, line integrity and proper front-to-rear braking balance before normal driving.

• Use matching 1/2" and 7/16" line fittings where applicable.
• Thoroughly bleed both circuits to remove air pockets.
• Inspect for leaks and test braking balance in a safe area.

This LDMINDA PV2 brass combination proportioning valve is for classic-car owners, restoration shops and DIY mechanics who need a reliable replacement for original GM-style combination valves or are upgrading brake systems from drum to disc. It suits vehicles that use dual-reservoir master cylinders and require OEM-like flow control and residual pressure behavior. Backed by LDMINDA’s one-year service support, it’s intended for anyone seeking a durable, OEM-compatible proportioning valve for maintenance or restoration projects.