Wilwood Rear Brake Package: Mopar / Dana Rear Ends, 2.36-inch Offset and Snap-Ring Bearings, Black FNSL4R, 12.88-inch Drilled/Slotted Rotors

This Mopar/Dana rear conversion pairs black four-piston service calipers with drilled and slotted 12.88 x 1.10-inch rotors. Separate internal drum shoes provide the parking function, while the included brackets are designed around the non-adjustable snap-ring bearing and 2.36-inch offset. Wilwood Engineering designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines. Bill Wood founded the company in 1977; its Camarillo, California operation serves motorsport, street-performance and specialized applications. Each component must be chosen for its role within the complete braking system.

Technical Details

Rotors and mounting dimensions

• Rotors: 12.88 in; 327.15 mm diameter x 1.10 in; 27.94 mm thick; vented Spec-37 Iron
• Friction faces: SRP Drilled & Slotted
• Rotor finish: Black Electro Coat
• Internal vanes: 48 curved
• Hats: aluminum; Black E-Coat; 1.540-inch hat offset
• 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
• Hat wheel-stud clearance holes: 0.520 / 0.520 / 0.520 in, corresponding to the listed hat patterns

Kit contents and separate parts

• Manufacturer part number: 140-9222-D
• Supply: one kit with brake components for both sides of the rear axle
• Mounting hardware: included
• Hubs: not included
• Spindles, master cylinder and brake booster: not included
• Hydraulic hoses: not included
• Required axle housing end: Mopar/Dana
• Axle offset: 2.36 in; 59.94 mm
• Internal drum parking-brake assemblies and bearing retainers are included; axle shafts and bearings are not supplied.

Calipers and friction components

• Calipers: Forged Narrow Superlite 4R; 4 pistons per caliper
• Caliper finish: Black Powder Coat
• Body construction: Forged aluminum
• Piston material: stainless
• Caliper mounting: radial
• Hydraulic inlet: 1/8-27 NPT
• Included pad compound: BP-10
• Listed piston bore sizes: 1.38 / 1.38 in

Fitment & Compatibility

Match the Mopar 8-3/4 or Dana 60 housing end and 2.36-inch axle offset before ordering. This version requires non-adjustable snap-ring Green bearings: Mopar MO400, Strange A1022 or Moser 9400M. The RP400 bearing with a pressed-on five-hole retainer is not compatible. Verify bearing diameter, flange pattern, axle register and shock clearance against DS-532; relocation of shocks may be necessary. The maximum axle flange is 6.61 inches with the specified chamfer. Hydraulic hoses, fittings and parking cables are separate; the universal 330-9371 cable kit requires application-specific installation. Nominal minimum wheel diameter: 17 in; 431.8 mm. Compare the actual wheel barrel and spokes with the linked clearance drawing; diameter alone does not establish fit.

Installation documents

• Installation instructions
• Technical bulletin

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.

With over 20 years of brake-system and restoration experience, PMB Performance can help you review the application, wheel clearance and remaining parts for the installation.