Wilwood Rear 14-Inch GT Rotor and Parking-Brake Assembly, Big Ford Bronco Flange with Black Superlite Calipers

Black Superlite 4R calipers mount radially outside the 14-inch GT rotor rings in this Big Ford Bronco rear package. The four-piston calipers use 1.12-inch stainless pistons, while iron hats enclose the separately actuated parking-brake shoes. Wilwood Engineering has designed and manufactured disc brake systems since Bill Wood founded it in 1977. Its Camarillo, California operation supplies calipers, master cylinders, brake rotors, valves, fittings and lines for specialized, street-performance and motorsport applications. Each component must be chosen to match the complete brake system.

Technical Details

• Manufacturer part number: 140-13333
• Application and package: Rear Brake Kits - Street Performance; Rear Kits; Disc; Parking; Sold as a kit.
• Caliper assembly: Forged Narrow Superlite 4R; 4 pistons per caliper; Forged Aluminium body; Radial mount
• Piston and finish specification: Stainless pistons; Black calipers; Black Powder Coat
• Hydraulic inlet: 1/8-27 NPT
• Wheel bolt pattern(s): 5 x 5.5 in; 5 x 139.7 mm
• Stud-hole / clearance provision: 0.640 in; 16.26 mm; diameter provision, not a thread designation
• Wheel diameter starting requirement: 18 in; 457.2 mm; verify the individual wheel against the installation drawing
• Rear axle-end interface: Big Ford Bronco; axle/flange offset 2.36 in; 59.94 mm
• Included mechanical components: Mounting hardware: Yes; hub(s): No; spindle(s): No
• Hydraulic components supplied: Master cylinder: No; brake booster: No; brake lines: No
• Specified pad compound: BP-10
• Separate rotor-hat specification: Iron; Black E-Coat; offset 1.540 inch; part 170-13326
• Rotor dimensions: 14.00 in; 355.6 mm outside diameter; 1.10 in; 27.94 mm thickness
• Rotor construction: Spec-37 Iron; Vented; GT Slotted

Fitment & Compatibility

Inspect the Big Ford bearing flange and measure 2.36 inches of axle offset before assembly. DS1028's clearance drawing applies to this 14-inch package; the matching iron hat must center on the axle register and accept the required 5 x 5.50-inch wheel pattern.

A maximum flange diameter of 6.61 inches and a 0.050-inch x 45-degree chamfer are specified for rotor clearance. The illustrated register is 2.88 inches; select the documented centering arrangement and match both axle offset and housing-end bolt pattern.

The installation reference identifies Big Ford Bronco rear applications with 3300-lb axle/11-inch drums for 1966–1975 and the listed 1976–1977 configurations. Verify the actual flange,2.36-inch offset and axle register.

Hydraulic hoses/fittings and parking-brake cables, adapters and cable hardware are not included. Choose a compatible cable arrangement for the internal parking brake; universal cable systems may require vehicle or cable modifications.

Manufacturer References

• Wilwood exact kit specifications
• Wilwood installation instructions DS1028
• Axle measurement worksheet

Ask PMB Performance for help comparing the installation requirements. We have more than 20 years of experience working with brake parts and fitment.