Wilwood Plain 12.19-inch Parking Rotors with Polished Rear Calipers — Mopar 8-3/4 / Dana 60 Snap-Ring Kit

Plain disc faces sit beside polished calipers in the Mopar/Dana parking-brake kit. Its polished 4-piston calipers and 12.19-inch plain-face rotors are assembled around the requirements of Mopar 8-3/4 / Dana 60, snap-ring bearings. 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

Select this rear package for Mopar 8-3/4-inch or Dana 60 ends with the specified non-adjustable snap-ring bearings and a 2.36-inch axle offset. The bearing requirement is essential; a differential name is not a substitute for checking axle retention. Use DS424 to compare the end, bearing and bracket stack before ordering. No vehicle-model fitment is implied for every axle carrying these differential names. Unlike a rear-disc package without a parking mechanism, this kit incorporates drum sections and internal mechanical shoes for that function. A cable installation must still be planned and checked for full release as well as holding operation. Hydraulic hose routing, wheel clearance and compatibility with the vehicle’s master cylinder remain part of the complete brake conversion.

Print and use the manufacturer wheel template at its specified scale. Check the barrel, spoke shape and offset on the wheels that will actually be used.

Package and installation requirements

• The one-piece iron drum/rotors incorporate the parking-brake drums; the internal shoes provide a mechanical parking brake independently of the four-piston service calipers.
• Parking-brake cables and hydraulic brake lines are separate. Wilwood references universal cable kit 330-9371; installation can require cable or vehicle modifications.
• Use the non-adjustable snap-ring bearing arrangement specified by Wilwood; confirm the bearing before ordering.

Technical Details

• Manufacturer part number: 140-7144-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: Mopar/Dana.
• 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.