Fox Body Rear Disc Brake Conversion: A Complete Guide

Fox Body Rear Disc Brake Conversion 5 Lug
Fox Body Rear Disc Brake Conversion 5 Lug from


If you own a Fox Body Mustang and are looking to upgrade your rear brakes, a rear disc brake conversion is a popular and worthwhile modification. Not only does it improve braking performance, but it also enhances the overall appearance of your vehicle. In this article, we will provide a comprehensive guide on how to perform a rear disc brake conversion on your Fox Body Mustang.

Benefits of Rear Disc Brake Conversion

There are several benefits to converting your rear brakes to discs. Firstly, disc brakes provide better stopping power and improved brake modulation compared to the stock drum brakes. This means you can have more control over your braking, especially in emergency situations. Additionally, rear disc brakes are more resistant to fade, making them ideal for high-performance driving. Lastly, the conversion gives your Fox Body Mustang a sleek and modern look.

Choosing the Right Rear Disc Brake Conversion Kit

Before you start the conversion process, it is important to choose the right rear disc brake conversion kit for your Fox Body Mustang. There are various options available, including complete kits that include all the necessary components such as calipers, rotors, brackets, and hardware. Make sure to select a kit that is specifically designed for your model and year of Mustang to ensure a proper fit.

Tools and Materials Required

Here is a list of tools and materials you will need for the rear disc brake conversion:

  • Socket set
  • Wrench set
  • Brake fluid
  • Brake cleaner
  • Brake line wrench
  • Brake bleeding kit
  • Jack and jack stands
  • Shop towels

Step-by-Step Conversion Process

Step 1: Preparation

Start by lifting the rear of your Mustang using a jack and securing it with jack stands. Make sure to remove the wheels to access the brakes.

Step 2: Remove the Drum Brakes

Begin by removing the brake drum assembly. This typically involves removing the brake drum, brake shoes, and hardware. Refer to your vehicle’s repair manual for detailed instructions.

Step 3: Install the Caliper Bracket

Next, install the caliper bracket included in your rear disc brake conversion kit. This bracket will provide a mounting point for the caliper.

Step 4: Install the Rotor

Slide the rotor onto the axle flange and secure it with the provided hardware. Make sure the rotor is properly aligned and centered.

Step 5: Install the Caliper and Brake Pads

Mount the caliper onto the caliper bracket and secure it with the supplied bolts. Then, install the brake pads into the caliper.

Step 6: Bleed the Brakes

Once all the components are properly installed, use a brake bleeding kit to remove any air from the brake lines. This will ensure optimal brake performance.

Step 7: Test and Adjust

After bleeding the brakes, double-check all connections and make any necessary adjustments. Test the brakes to ensure they are functioning properly before taking your Fox Body Mustang for a test drive.


A rear disc brake conversion is a fantastic upgrade for your Fox Body Mustang. Not only does it improve braking performance, but it also adds a touch of style to your vehicle. By following this comprehensive guide, you can successfully complete the conversion process and enjoy the benefits of rear disc brakes on your Mustang.