How to Replace Rear Brake Shoes: Step-by-Step Guide

The brake system is one of the most critical safety components of any vehicle. At the heart of many brake systems, particularly in rear drum brakes, are brake shoes—curved metal backing plates covered with friction material that create the stopping power when pressed against the brake drum. Over time, this friction material wears thin, requiring replacement to maintain safe braking performance. Understanding how to replace rear brake shoes is an essential skill for vehicle maintenance, whether you’re performing this task yourself or working with a professional mechanic.

Understanding Your Brake System Components

Before diving into the replacement process, it’s important to understand what you’re working with. In drum brake systems, brake shoes are held in place by a combination of springs and a wheel cylinder. The wheel cylinder contains a small hydraulic piston that pushes the two shoes apart when you apply the brakes, forcing them into contact with the inside of the rotating drum. A screw adjuster located at the bottom gradually extends to compensate for natural wear over time. For parking and emergency brake functions, a cable-operated lever mechanically forces the shoes apart, providing backup stopping power when the main hydraulic system isn’t engaged.

The friction material on the shoe wears gradually with every brake application. Eventually, this material becomes so thin that brake performance diminishes significantly, and you’ll notice symptoms like longer stopping distances, a soft brake pedal, or grinding noises during braking.

Essential Tools and Materials You’ll Need

Gathering the right tools before you start is crucial for a smooth and efficient replacement process. Here’s what you should have on hand:

• Lug wrench for removing wheel bolts
• Jack and jack stands for safely raising the vehicle
• Brake drum puller (if the drum is stuck)
• Brake spring retainer tool to compress and hold springs
• Brake adjuster tool or large flathead screwdriver
• Penetrating fluid for stuck components
• High-quality brake cleaner (aerosol preferred)
• Brake lubricant or high-temperature grease
• Anti-seize compound for adjuster screws
• Wire brush for cleaning backing plate surfaces
• Safety equipment including work gloves, safety goggles, and a dust mask
• Replacement brake shoes (matched set for both rear wheels)
• Springs and hardware (often included with shoe kits)

Preparing Your Workspace and Vehicle

Safety should be your primary concern when working on brake systems. Begin by parking your vehicle on a level, solid surface away from traffic. Engage the parking brake and block the front wheels with wheel chocks to prevent any accidental rolling. This foundational step is absolutely critical—never work under a vehicle supported only by a jack.

Loosen the lug nuts on the rear wheels before raising the vehicle. This is much easier to do when the wheel is on the ground and the full weight of the vehicle is pressing down. Once the lug nuts are loose, raise the rear of the vehicle using a floor jack positioned under the frame or designated jacking points. Always support the vehicle on sturdy jack stands placed at safe points along the frame. Remove the lug nuts completely and take off the wheels.

A professional tip: work on only one wheel at a time. This approach allows you to use the other rear wheel as a reference guide if you become uncertain about spring placement or component orientation during reassembly.

Removing the Brake Drum

With the wheel removed, you’ll see the brake drum—a cylindrical metal component that rotates with the wheel. In many cases, the drum slides off easily once the wheel is removed. However, if the brake shoes have worn unevenly or if there’s corrosion around the drum’s edges, it may be stuck.

Before attempting to remove a stuck drum, you’ll need to loosen the brake adjuster. Locate the small rubber access port on the rear of the backing plate (the stationary metal plate that holds all the brake components). Remove this plug and insert a brake adjuster tool or large flathead screwdriver into the hole. You’ll see a star-shaped wheel inside. Turn this adjuster wheel in the direction that loosens the shoes—this pulls them away from the drum’s inner surface, similar to opening a circle outward.

If the drum still won’t budge after backing off the adjuster, apply penetrating fluid around the drum’s outer edge where it meets the hub and let it sit for 15 to 30 minutes. Then, using a soft-faced hammer or rubber mallet, gently tap the face of the drum (not the edge) to break the bond between the drum and hub. You may need to tap multiple times and from different angles. Once loose, it should slide off relatively easily. In extremely rare cases where the drum is severely corroded, it may need to be cut off, but this is uncommon with proper maintenance.

Inspecting and Cleaning the Brake Drum

Once the drum is removed, take time to inspect its internal surface carefully. Look for signs of scoring, grooving, or uneven wear patterns on the friction surface where the shoes make contact. Light scoring is normal, but deep grooves or severe wear may indicate that the drum needs to be resurfaced by a machine shop or replaced entirely.

Clean the drum thoroughly with brake cleaner and a clean cloth. Remove any accumulated brake dust, rust, or debris from the inside surface. This inspection step is valuable for identifying potential issues early. If you notice fluid seepage or cracking on the drum, replacement is necessary. A heavily damaged drum that’s resurfaced beyond its safe minimum thickness specification should also be replaced rather than reused.

Disassembling the Brake Shoe Assembly

Now comes the detailed work of removing the old brake shoes and associated hardware. Begin by cleaning the entire assembly with brake cleaner to remove accumulated dust. The brake shoes are held in place by hold-down springs and return springs that connect them to the backing plate.

Start by removing the hold-down springs. These springs use a pin and a spring retainer that you compress and twist to release. Using a brake spring retainer tool, press down on the retainer while turning it counterclockwise—this motion releases the spring tension and allows the component to come free. Work carefully because these springs are under tension and can snap suddenly if not handled properly.

Next, address the return springs that connect the shoes together. Unhook the lower spring first—this is the one positioned at the bottom of the shoe assembly. You’ll need to carefully manipulate it with your tool to disengage it from the hook on each shoe. Once the lower spring is free, the shoes can often be removed as a unit along with the adjuster mechanism. If not, remove the upper spring and any remaining adjuster components, then remove the shoes individually.

Comprehensive Component Inspection and Preparation

With the shoes removed, perform a thorough inspection of all remaining brake components. Check the wheel cylinder—the small hydraulic component that pressurizes the shoes. If you notice any wetness around the rubber seals or if the seals appear cracked, replacement is warranted. A leaking wheel cylinder will cause brake fluid to seep and soak the brake components, compromising braking performance and potentially causing complete brake failure.

Examine the backing plate carefully, particularly the small raised portions where the shoes pivot and rest. These contact points accumulate wear over time. Clean these areas thoroughly with a wire brush to remove rust and old brake dust. This is also an ideal time to clean the entire backing plate with degreaser and a hose if you’re working outdoors.

The self-adjuster mechanism deserves special attention. Clean the adjustment screw thoroughly and apply anti-seize compound to prevent future corrosion and seizing. Apply a small amount of high-temperature grease to all metal-on-metal contact points where components slide or pivot against the backing plate. Don’t overdo this—too much lubricant can attract dust and create problems. A thin, even coating is what you’re aiming for.

Inspect the parking brake lever and cable. Ensure the cable moves freely and isn’t corroded or frayed. Clean any rust from the lever pivot point and apply a light coat of grease.

Installing New Brake Shoes and Hardware

When you’re ready to install new shoes, ensure your replacement kit includes everything needed—shoes, springs, adjuster, and hardware. Many quality brake shoe kits come with all these components pre-assembled or organized for easy identification.

Begin by installing the hold-down springs on the new shoes. Position each shoe on the backing plate and secure it with its hold-down spring, using your spring tool to compress and twist the retainer into place. Pay careful attention to proper orientation—this is critical for correct brake function.

A common mistake that must be avoided: don’t mix up the primary and secondary shoes. The primary shoe is the trailing shoe positioned toward the rear of the vehicle. These shoes have different friction material thickness and must be installed in their correct positions. Consult your vehicle’s service manual or the instruction sheet that came with your brake kit to verify correct positioning.

Next, install the bottom adjuster component. Ensure it’s oriented correctly—it should be positioned at the bottom of the shoe assembly and must move freely when adjusted. Install the return springs carefully. These springs carry significant tension, so work methodically and use your spring tool to position them correctly. Start with the lower spring, then add the upper spring if your design includes one.

Reconnect the parking brake cable to the appropriate lever or component on the brake shoe assembly, ensuring it’s properly seated and won’t interfere with shoe movement.

Reassembling and Adjusting the Brake System

Before reinstalling the brake drum, verify that all components are clean and free of contamination. Loosen the brake adjuster wheel to allow the shoes to collapse inward, creating sufficient clearance for the drum to slide over them without binding. Slide the drum carefully over the wheel studs and onto the backing plate. If resistance is encountered, back off the adjuster further until the drum fits freely.

Once the drum is installed, reinstall the wheel and tire, securing it with several lug nuts (don’t fully tighten yet). Spin the wheel slowly by hand while using the brake adjuster tool to turn the star wheel. Adjust the shoes inward gradually until you feel light contact between the shoes and the drum. You should barely hear or feel this contact, and there should be only minimal resistance when spinning the wheel. Avoid overtightening—this can cause rapid wear and brake dragging.

After both rear wheels have been adjusted, lower the vehicle to the ground and fully tighten all lug nuts in a star or cross pattern to ensure even pressure. Test your brakes at low speeds in a safe area before returning to normal driving.

Common Issues and Solutions

Frequently Asked Questions

How often should brake shoes be replaced?

Brake shoe replacement intervals vary based on driving habits and conditions, typically ranging from 30,000 to 40,000 miles. Inspect them annually and replace when friction material thickness drops below the manufacturer’s specifications.

Can I replace just one rear brake shoe?

No, always replace brake shoes in complete sets. Replacing only one side creates uneven braking pressure, leading to pulled steering and reduced safety.

What’s the difference between drum brake shoes and disc brake pads?

Drum brake shoes are curved metal plates with friction material that work inside a drum. Disc brake pads are flat plates that clamp against a rotor. They operate on different principles and aren’t interchangeable.

Should I replace my wheel cylinder when replacing brake shoes?

If your wheel cylinder shows signs of leaking or wear, replacement is recommended. Doing this during brake shoe replacement prevents future brake failure and expense.

How tight should the brake adjuster be set?

Adjust until shoes barely contact the drum with minimal resistance. You should feel very slight contact when spinning the wheel by hand—this is the correct specification.

Safety Reminders

Always wear appropriate personal protective equipment including gloves, safety goggles, and a dust mask when working with brake components. Brake dust contains asbestos in older vehicles, which poses serious health risks if inhaled. Never work under a vehicle supported only by a jack. Always use properly rated jack stands. Test your brakes thoroughly in a safe location before returning to normal driving. If you’re uncomfortable with any step in this process, consult a professional mechanic.