Dynamic Friction 631-56005L Disc Brake Rotor - Front Left

Drilled and Slotted Front Left Rotor

The Dynamic Friction DFC Brake Rotor - Drilled and Slotted - Silver, part number 631-56005L, is a vented disc brake rotor built for front left applications on select Ford, Lincoln, and Mercury vehicles. Its slotted X drilled surface, zinc silver hat finish, and rust-resistant coating support consistent braking performance and corrosion protection in demanding street use.

Key Features

• Part number 631-56005L for front left brake rotor replacement
• Slotted X drilled surface type for directional brake surface operation
• Vented rotor design with 300 mm outside diameter
• Zinc silver hat finish with rust-resistant coating
• 5-lug, 5-bolt pattern with 127 mm bolt circle diameter
• Center hole diameter: 77.8 mm
• Nominal thickness: 30.1 mm; discard thickness: 28.45 mm
• Compatible with select Ford LTD, Thunderbird, Lincoln Continental, and Mercury Marquis applications

Product Details

This DFC Brake Rotor - Drilled and Slotted - Silver is engineered for vehicles that use a vented front left rotor with a 127 mm bolt circle and 5-lug hub pattern. The directional slotted and drilled braking surface is paired with a plain disc finish and zinc silver hat finish to help maintain a clean appearance while resisting rust on exposed surfaces. The part number 631-56005L is listed for 1974-1979 Ford, Lincoln, and Mercury models, including Ford LTD, Ford Thunderbird, Lincoln Continental, Mercury Grand Marquis, Mercury Marquis, Mercury Montego, and Mercury Colony Park. It is also listed for specific police, taxi, and rear-disc configurations where noted in the fitment data.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Rotor Helps Address

• Brake pulsation caused by worn or heat-affected rotor surfaces
• Reduced braking consistency from rotor wear near discard thickness
• Surface corrosion on exposed rotor and hat areas
• Brake fade concerns during repeated stops in heavier classic vehicles
• Fitment issues when replacing a front left rotor on the listed Ford, Lincoln, and Mercury models

Installation Notes and Tips

Verify rotor diameter, center hole diameter, bolt circle, and thickness before installation. Confirm the vehicle’s brake configuration and position, since fitment varies by model year and notes such as police package, taxi use, rear disc, or rear shoe size. For best results, inspect pads, caliper condition, and hub surfaces before installing part number 631-56005L. Always match the directional rotor orientation to the vehicle side and follow the service manual for torque and bedding procedures.

Quality Assurance

Dynamic Friction DFC brake rotors are built to meet the dimensional and finish requirements listed for the application, including vented construction, rust-resistant coating, and zinc silver hat finish. This rotor is specified for direct replacement use on the confirmed fitment vehicles and positions shown above.