Wilwood Big Ford 2.36-Inch Offset Rear Drag Brakes, Dual XRD Calipers and 11.25-Inch Dynamic Rotors

Four XRD calipers provide the dual rear arrangement for a measured Big Ford housing. Check the 2.36-inch offset and clearance around the 11.25-inch rotors. The wheel-end assembly is selected by its measured housing-end interface and racing hydraulic arrangement. Wilwood Engineering was established in 1977 by Bill Wood and is based in Camarillo, California. Disc brake systems and components are its focus, from brake rotors and calipers to master cylinders, valves, brake lines and fittings. Its work spans motorsport, street-performance and specialized applications, with the complete brake system determining the correct individual components.

Technical Details

• Rotor hat bolt-circle specification: 5 X 4.50; 5 X 4.75; 5 X 5.00 inches; this does not change the retained hub or axle wheel pattern
• Hydraulic hose selection: Not included; supply suitable hoses and fittings separately
• Hardware provision: Included; verify the installed fastener engagement
• Not included: spindles, wheel hubs, master cylinder or brake booster
• Manufacturer identification: 140-17876-D
• Application and supplied quantity: rear conversion kit; Sold as a kit.
• Hydraulic service-caliper specification: Forged XRD Lug Mount; 4 pistons per caliper; Type III Anodize
• Caliper attachment: Lug
• Brake pads supplied: BP-28
• Piston type: Stainless
• Service-caliper port: 1/8-27 NPT
• Rotor assembly specification: 11.25 × 0.35 inches; Super Alloy; Drilled
• Wheel envelope: 15 in; the complete wheel-clearance drawing determines fit
• Rear housing interface: Big Ford; measured axle offset 2.36 in

Fitment & Compatibility

Two XRD calipers per rear rotor distinguish this Big Ford drag-racing assembly. It requires the documented Big Ford flange, measured 2.36-inch axle offset and correct bearing retainers. Plan the hydraulic circuits and inspect both calipers within the wheel envelope shown by DS-1607. Dynamic lug-drive hats and internal snap rings carry the drilled 11.25-inch Super Alloy rotors without changing the axle wheel-bolt pattern. Hoses and fittings are separate. The Lincoln Town Car entry in the table below is conditional on actual axle measurements and is not a direct-fit claim based on year and model.

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.