Wilwood Polished Rear Parking Brakes — Plain 12.19-inch Rotors for 2.36-inch New-Style Big Ford Ends

This polished/plain-disc package requires the 2.36-inch new-style Ford axle measurement. Its polished 4-piston calipers and 12.19-inch plain-face rotors are assembled around the requirements of Big Ford New Style, 2.36-inch offset. Wilwood Engineering, founded by Bill Wood in 1977, designs and manufactures disc brake systems in Camarillo, California. The range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications, with each component chosen to suit the complete brake system.

Fitment & Compatibility

Although this package uses the Big Ford new-style/Torino flange, its required axle offset is 2.36 inches. That dimension differentiates it from the commonly encountered 2.50-inch version with a similar housing-end description. Check the actual shaft and housing combination against DS498 and the offset worksheet rather than inferring the offset from the flange name. The 1990 Lincoln Town Car row below does not override those measurements. The one-piece drum/rotor houses an internal parking-brake shoe assembly, while the four-piston caliper operates the service brake. Before fitting the system, establish how the parking cables will attach and release, select the hydraulic lines, and check the complete wheel profile. The nominal 15-inch wheel guide is not a promise that every 15-inch wheel clears.

Read the full application entry below, including the brake, spindle and numbered-note fields that apply to that vehicle.

Package and installation requirements

• Mechanical parking is provided by shoes within the rotor’s integral drum. The 12.19-inch disc surfaces are operated by the service calipers, so cable adjustment does not replace hydraulic brake setup.
• This kit supplies no parking cable or flexline set. Wilwood identifies universal cable kit 330-9371; confirm the required routing and any installation modifications.

Technical Details

• Manufacturer part number: 140-7582-P.
• Calipers: 4 pistons; forged aluminum; stainless steel pistons.
• Caliper attachment: lug mount; 1/8-27 NPT hydraulic inlet.
• Caliper finish: Polished aluminum.
• Sold as one kit. Mounting hardware is included. Hubs are not included.
• Brake pads are included; use the compound and installation instructions specified for this rotor package.
• Spindles, master cylinder, brake booster and hydraulic brake lines are not included.
• Rotor dimensions: 12.19 in; 309.63 mm diameter x 0.81 in; 20.57 mm thick.
• Rotor construction: Iron; vented; Plain Face friction surface.
• Housing/flange arrangement: Big Ford New Style.
• Axle flange offset: 2.36 in; 59.94 mm.
• Wheel-size guide: 15 in; 381 mm minimum nominal diameter; verify actual template clearance.
• Rotor/hat wheel-stud clearance patterns: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm.
• Rotor/hat stud-hole clearance diameters: 0.52 in; 13.21 mm. These are hole sizes, not wheel-stud thread specifications.
• The rotor/hat drilling does not change the vehicle hub or axle wheel bolt pattern.

Manufacturer references

• Wilwood product and configuration information
• Installation instructions
• Technical bulletin

A vehicle that has already been modified needs a hardware check as well as a model-year check. PMB Performance offers over 20 years of experience to help compare the axle, spindle, wheel and brake details before you order.

WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.

Vehicle Applications

Application Notes

1. Kit may fit some 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
2. Line kit included (manufacturer): None