Brake shoes clicking is typically a mechanical or material issue inside a drum brake system. The noise often points to loose or worn hardware, contamination on the lining, or irregularities in the drum surface. The sound can occur while braking or simply as the drum turns, and it usually warrants inspection.
Common causes of brake shoe clicking
These issues fall into hardware, hydraulic action, and drum wear categories. Below are the most frequent culprits and what they involve.
Hardware and mounting issues
Before you inspect the drum, check the components that hold the shoes in place. A clicking sound is commonly traced to loose, worn, or misaligned hardware that lets the shoe move slightly as the drum spins.
- Worn, weakened, or broken hold-down springs and retainers that secure the shoes to the backing plate.
- Loose or damaged anchor pins, pivots, or anti-rattle hardware.
- Misadjusted or sticking automatic/manual brake shoe adjusters.
- Rivets, pins, or edges on the brake shoe or backing plate that extend and contact the drum.
- Loose backing plate components or hardware that vibrate as the drum rotates.
Noise from hardware issues is typically heard during drum rotation and may change with braking force. If you hear this, a thorough hardware inspection and replacement are advised.
Hydraulic and wheel cylinder issues
In some drum brake systems the hydraulic action that applies the shoes can introduce movement that produces a clicking sound, especially if pistons or seals are sticking or leaking.
- Sticking, leaking, or seized wheel cylinder pistons that rapidly reposition as pressure changes.
- Worn wheel cylinder bore or damaged seals that cause intermittent movement of the piston and shoes.
- Uneven hydraulic pressure from the master cylinder affecting shoe return and contact.
Hydraulic-related clicking generally appears as the brakes are applied or released and can also accompany a soft or spongy pedal. A professional inspection is advised if hydraulic problems are suspected.
Drum and shoe wear or contamination
Drum surface irregularities or contaminants on the friction material can cause intermittent contact that sounds like clicking.
- Drum out-of-round, scoring, or glazing that causes the shoe to hop or snap slightly as it contacts the drum.
- Oil, grease, or brake fluid on the shoes or drum, reducing friction and causing uneven engagement that can yield a clicking noise.
- Debris (grit, rust, small stones) trapped between the shoe and drum.
- Wear of the brake lining that exposes rivet heads or edges that contact the drum during rotation.
When drum and shoe wear or contamination are the cause, the remedy typically involves turning or replacing the drum, replacing the shoes, or cleaning and repairing contaminated areas.
Diagnosis and next steps
If you hear brake shoes click, a professional inspection is recommended to pinpoint the exact cause and prevent safety risks. Mechanics typically follow these steps to diagnose the issue and determine the proper fix.
- Confirm the noise originates from the drum brakes and note when it occurs (during braking, coasting, or while the wheel turns).
- Inspect the drum surface for scoring, glazing, or out-of-round conditions.
- Check all brake hardware for wear, looseness, or damage, including springs, pins, and adjusters.
- Remove the drum to inspect the shoes and wheel cylinder for contamination or leakage.
- Inspect the parking brake linkage and cables for binding or misadjustment.
If issues are found, replace faulty parts and ensure proper adjustment. Do not ignore persistent brake noises, as they may indicate safety-critical problems.
Summary
Brake shoe clicking usually points to hardware wear or looseness, hydraulic issues, or drum/shoe surface problems. A thorough inspection by a qualified technician is advised if you hear this noise. Regular brake maintenance helps prevent these issues from escalating and keeps braking performance reliable.