Wilwood Single XRD Rear Dynamic Drag Brake Kit for Big Ford 2.36-Inch Offset, 11.25-Inch Drilled Super Alloy Rotors

A Big Ford axle with 2.36-inch offset takes the specified single-caliper XRD rear package. Compare bearing retainers and the dynamic hat interface. The wheel-end assembly is selected by its measured housing-end interface and racing hydraulic arrangement. From Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Founded in 1977 by Bill Wood, the company produces calipers, brake rotors, master cylinders, valves, fittings and brake lines. Component selection depends on the requirements of the complete braking system.

Technical Details

• Mount arrangement: Lug
• Supplied brake-pad material: BP-28
• Caliper piston construction: Stainless
• Caliper fluid connection: 1/8-27 NPT
• Rotor diameter, width, material and face: 11.25 × 0.35 inches; Super Alloy; Drilled
• Nominal wheel diameter starting point: 15 in; the complete wheel-clearance drawing determines fit
• Housing-end flange and axle relationship: Big Ford; measured axle offset 2.36 in
• Hat drilling for retained axle flange: 5 X 4.50; 5 X 4.75; 5 X 5.00 inches; this does not change the retained hub or axle wheel pattern
• Brake-hose provision: Not included; supply suitable hoses and fittings separately
• Supplied installation fasteners: Included; verify the installed fastener engagement
• Components outside the kit: spindles, wheel hubs, master cylinder, brake booster
• Wilwood manufacturer number: 140-17875-D
• Kit function and position: rear conversion kit; Sold as a kit.
• Caliper family, piston count and finish: Forged XRD Lug Mount; 4 pistons per caliper; Type III Anodize

Fitment & Compatibility

The single-caliper XRD arrangement is built for the documented Big Ford housing end with 2.36-inch axle offset. Inspect the actual axle flange, bearing retainer and bracket centers against DS-1606 before ordering. Each rear wheel uses one four-piston caliper on an 11.25 × 0.35-inch drilled Super Alloy rotor. The lug-drive hat is retained by an internal snap ring and allows independent rotor expansion; it does not alter the axle wheel-stud pattern. Confirm wheel space and supply the hydraulic hoses separately. The preserved Lincoln Town Car row below requires axle verification and cannot establish fit from model year alone.

Wilwood product specifications · Wilwood installation and compatibility information · Axle measurement worksheet · Wilwood installation and compatibility information

Before purchase, send PMB Performance the actual housing flange, axle offset, rotor registration and parking or hydraulic arrangement. Our over 20 years of parts and fitment experience helps identify the installation details that need to be checked.

Manufacturer warning — brake pads only: WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov.