Wilwood Rear GT Brake Package with Parking Shoes — Big Ford New Style 2.50-Inch Offset, Red 14-Inch AERO4

For a matching Big Ford New Style axle, this red AERO4 version supplies GT-slotted 14-inch rear rotors and drum-in-hat parking equipment. Measure the housing and flange before choosing the kit, particularly on a vehicle with a swapped or custom axle. Based in Camarillo, California, Wilwood Engineering has designed and manufactured disc brake systems and components since Bill Wood founded the company in 1977. Its work spans motorsport, street-performance and specialized applications, with a product range covering master cylinders, calipers, brake rotors, valves, fittings and brake lines. These parts must be chosen for the requirements of the entire brake system.

Technical Details

• Manufacturer part number: 140-18150-R
• Rotor specification: Spec-37 Iron, GT Slotted, vented; 14.00 x 1.10 inches
• Caliper specification: 4-piston AERO4 in Red Powder Coat; radial mount
• Included service pad compound: BP-10; Stainless pistons
• Caliper body material: Forged aluminum
• Hydraulic inlet: 1/8-27 NPT
• Rotor/hat wheel-stud clearance pattern(s): 6 x 5.5 in; 6 x 139.7 mm; match the installed hub/axle pattern
• Housing/flange application: Big Ford New Style
• Required axle offset: 2.50 in; 63.5 mm
• Parking brake: included internal drum/shoe assembly; cable and clevis hardware are not included
• Hydraulic brake hoses: not included; select the correct application-specific lines/fittings
• Wheel clearance: 18-inch wheels may fit; verify the manufacturer’s complete caliper/rotor template for the installed wheel
• Supplied as one kit with mounting hardware; spindles, hubs, master cylinder and booster are not included

Fitment & Compatibility

This 14-inch AERO4 installation is selected by rear-housing geometry: Big Ford New Style large-bearing flange, 2.50-inch axle offset and six-lug 6 x 5.5-inch drilling. A 1990 Town Car model listing does not verify those dimensions or convert its original axle to six lugs. Confirm the actual housing and axle before choosing the kit.

DS1648 includes the internal drum parking-brake assembly, but its cable and clevis connections must be supplied for the vehicle. The maximum axle flange diameter is 6.80 inches with the drawing’s specified chamfer; match the 2.80-inch register. Original hydraulic lines do not directly adapt, so obtain suitable hoses and fittings separately.

The table below provides the full application breakdown; match its year, model and brake-configuration details.

Manufacturer Resources

• Exact Wilwood kit specifications and wheel-clearance information
• Installation instructions and component list
• Axle-offset measurement worksheet

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.

PMB Performance brings over 20 years of experience with brake components and fitment details. Send us your VIN together with the installed axle, spindle, brake and wheel specifications if you need help confirming this package.

Vehicle Applications

Application Notes

1. Line kit included (manufacturer): None