Washing Machine Noise During Agitation? What to Check

Quick Answer

If your washer is noisy only during agitation (wash action, not spin), the most common cause is wear or looseness in the agitator mechanism: stripped agitator splines/dogs, a worn agitator coupling, or a loose agitator bolt. First action: stop the cycle, then check for agitator looseness by rocking it by hand and inspecting for excessive free-play or grinding. Any wobble, clicking, or ratcheting points to an agitator drive issue.

Identify the Noise First

Before you take anything apart, confirm the noise is truly tied to the agitator mechanism. Use this quick guide.

During spin: If the noise mainly happens at high speed with the tub rotating, it is usually not the agitator mechanism (more often tub bearings, drive pulley, suspension, or an item between tubs).
During drain: If the noise starts when water pumps out (often a buzz, grind, or rattle), suspect the drain pump or a blockage, not the agitator.
During fill: A hiss, squeal, or hammering during fill points to the inlet valve or plumbing, not the agitator.
Constant (all the time): A constant hum or vibration across multiple cycle phases often indicates motor, belt, or a machine leveling issue rather than the agitator itself.
Intermittent only while the agitator moves back and forth: This is the key pattern for an agitator mechanism problem. Listen for clicking, ratcheting, clunking, or grinding that matches the agitation strokes.

If the sound occurs only when the agitator is actively moving and changes with agitation speed (gentle vs heavy), stay focused on the agitator, its mounting, and its drive parts.

What This Noise Usually Means

During agitation, the motor and transmission (or drive system) apply short back-and-forth force pulses to the agitator. When the agitator connection is worn or loose, those force pulses turn into noise:

Clicking or ratcheting: The upper agitator section is slipping instead of grabbing, or worn dog ears (in many dual-action designs) are skipping.
Heavy clunk each direction change: The agitator is loose on the shaft, the mounting bolt is backing out, or the coupling/splines are worn so the agitator shifts under load.
Grinding: Plastic splines, couplers, or internal agitator parts are worn down; the agitator may be rubbing because it is sitting crooked or wobbling.
Thumping with poor wash performance: The agitator is not transferring motion correctly, so it bangs and slips instead of moving clothes through the wash.

The diagnostic goal is to confirm whether the noise is coming from the agitator assembly itself (top components and mounting) or from the agitator drive below it.

Most Common Causes

Worn agitator dogs (dual-action/top portion not biting): Typically causes a clicking/ratcheting sound and weak rolling action. More noticeable with heavier loads.
Loose agitator bolt or retaining fastener: Causes a dull clunk and visible or feelable wobble. Often gets louder over time.
Stripped agitator splines or worn drive hub: The agitator loses its tight fit on the shaft, creating slipping, grinding, or knocking.
Cracked agitator base or internal cam components: Can make a thump or pop and may worsen quickly as the plastic flexes.
Foreign object under the agitator: A coin, hairpin, bra wire, or debris can rattle or scrape during agitation and sometimes locks the agitator intermittently.
Agitator coupling/drive block wear (model-dependent): Noise under load and inconsistent agitation, especially at direction changes.

How to Check Safely

These checks focus on confirming an agitator mechanism issue without turning this into a full teardown.

1) Unplug the washer. Do not rely on the lid switch alone.
2) Confirm the symptom in the right phase. If possible, run a short wash/agitate portion again and listen. Then stop and unplug.
3) Check agitator looseness. Open the lid and grasp the agitator near its base. Rock it front-to-back and side-to-side. A small amount of movement can be normal, but a clear wobble, knock, or clunk is not.
4) Check for upper section slip (dual-action agitators). Hold the lower agitator section steady and try turning the upper portion by hand. It should index/turn in one direction with firm resistance and lock the other way (varies by design), not freely ratchet with loud clicks. Excessive skipping usually indicates worn dogs/cam.
5) Inspect for debris under/around the agitator. Look for items wedged at the base. If your model has an agitator cap or dispenser, remove it and look for loose plastic fragments (a clue the internal cam/dogs are failing).
6) Tighten the agitator bolt if accessible. Many agitators have a cap/dispenser that pops off, exposing a center bolt. If the bolt is loose, snug it firmly (do not over-torque). Recheck wobble afterward.
7) Check agitation performance. If the noise is present and clothes are barely moving, suspect slipping dogs, stripped splines, or a failing hub/coupler. Noise plus poor wash action is the strongest indicator the agitator mechanism is worn.

If a simple tighten removes the clunk, you likely found it. If noise remains with visible wobble or consistent ratcheting, the next step is usually replacing the worn agitator internal parts or the drive hub (model-specific).

When This Is Normal vs A Problem

Often normal:

Light swishing of water and clothing during agitation.
A soft, regular motor sound that stays consistent and is not tied to sharp impacts.
A mild click from some dual-action designs as the upper portion indexes, as long as wash performance is strong and there is no wobble.

A problem that needs attention:

Distinct clunk at each direction change, especially if you can feel the agitator shifting.
Ratcheting/clicking that is loud and frequent, paired with weak turnover of clothes.
Grinding, scraping, or plastic-shaving noise.
Agitator rocks noticeably, sits crooked, or can be lifted more than expected.
Noise appeared suddenly after an overload or after washing heavy items (blankets, rugs), suggesting something loosened or cracked.

When to Call a Technician

You tightened the agitator bolt and it still clunks or wobbles. This often means stripped splines, a worn drive hub, or a cracked agitator base.
Grinding persists or you see plastic shavings/fragments. Continued use can quickly damage mating parts and escalate the repair.
The agitator is stuck, hard to turn by hand, or the washer trips breakers. That moves beyond basic agitator wear and may involve the drive system.
You cannot access the retaining bolt or the design is unfamiliar. Some models require specific pull techniques to avoid breaking the agitator or damaging the shaft.

How to Prevent This Problem

Avoid chronic overloading. Overloads hammer the agitator hub and dogs, accelerating slip and cracking.
Wash heavy items correctly. Balance bulky loads and don’t force a single heavy item to one side; it increases direction-change shock.
Keep pockets empty. Coins and small hardware can migrate under the agitator and start scraping and rattling.
If the agitator cap/dispenser is removed for cleaning, reseat it properly. A misseated cap can allow water and debris to collect and speed internal wear.
Address small clicks early. Replacing worn dogs or a hub early is usually simpler than repairing a damaged shaft interface later.

Conclusion

Noise during agitation is most often a worn or loose agitator mechanism: dogs/cam slipping, a loose center bolt, or worn splines/hub. Verify the noise is limited to agitation, then check for wobble, slipping upper action, and debris under the agitator. If tightening doesn’t stop the clunking or you hear grinding, plan on an agitator rebuild or hub repair, or bring in a technician for model-specific disassembly.

Frequently Asked Questions

My washer is loud during agitation but quiet during spin. Does that confirm the agitator is bad?

It strongly suggests the agitator mechanism or its mount is involved, because spin uses different load paths and doesn’t drive the agitator the same way. Confirm by checking for agitator wobble, a loose center bolt, and upper agitator slip. If wash performance is also poor, worn dogs or a stripped hub becomes the top suspect.

What does a ratcheting or clicking sound during agitation usually mean?

On many dual-action agitators, it means the internal dogs/cam are slipping instead of grabbing, especially under load. You’ll often see the top section fail to move clothes through the wash well. If the clicking is loud and frequent, replacement of the dog kit or cam components is typically the fix.

Can a loose agitator bolt really make a loud clunk?

Yes. Agitation reverses direction repeatedly, and a slightly loose agitator can knock on each reversal. If you can feel a knock when rocking the agitator by hand, remove the cap/dispenser, tighten the retaining bolt, and recheck. If it still clunks, the splines or hub may already be worn.

How do I tell the difference between debris under the agitator and worn agitator parts?

Debris tends to cause scraping, rattling, or a random tick that may come and go, sometimes starting right after washing items with metal pieces. Worn agitator parts are more consistent and match the agitation rhythm, often with slipping and reduced wash action. Visual inspection under the cap and at the agitator base helps separate the two.

Is it safe to keep using the washer if it only clicks during agitation?

If it’s a mild, occasional click and wash performance is normal with no wobble, it may be acceptable short-term. If the clicking is loud, frequent, or paired with clunking, wobbling, or grinding, continuing to run it can wear the hub/splines further and turn a simple internal agitator repair into a more involved drive repair.

There’s a kind of weight that lifts when the fog clears and the same problem stops feeling endless. The fix isn’t mysterious anymore—just solid, plain, and finally on the same side as you.

What’s left is the ordinary rhythm of life, minus the extra friction. You can almost feel your attention unclench, like it’s been waiting its turn.