How to Replace the Agitator on a GE Top-Load Washing Machine

The agitator on a GE top-load washing machine (GTW series) is the central post inside the wash tub that creates the back-and-forth motion to clean clothes. Over time, the agitator can crack, the internal directional cogs (dogs) can wear out causing the upper section to spin freely in both directions, or the agitator base can strip on its drive shaft. When any of these failures occurs, wash performance drops dramatically — clothes come out still dirty, or the agitator makes a grinding noise during the wash cycle without actually moving clothes through the water.

GE uses two agitator designs in their GTW top-load washers: a dual-action agitator where the upper section rotates independently from the lower section (upper oscillates for delicate action, lower drives the full agitation), and a single-piece impeller on some newer models that replaces the traditional agitator entirely. This guide covers the dual-action agitator found on most GTW models including the GTW465, GTW485, GTW680, and GTW750 series. The replacement part WH16X29509 fits most dual-action models — verify your specific model number on the rating plate inside the lid or on the rear panel.

Before You Start

• Tools needed: 7/16" socket and ratchet (agitator bolt), flathead screwdriver (cap removal), pliers (optional for stubborn cap)
• Parts needed: GE agitator assembly WH16X29509 (verify model compatibility) — includes upper section, lower section, and directional cogs. Alternatively, order just the agitator dog kit if only the directional cogs are worn.
• Time required: 20-30 minutes
• Difficulty: Beginner to intermediate
• Safety warning: Unplug the washing machine before starting. Do not reach under the agitator while the machine is connected to power.

Step-by-Step Instructions

Step 1: Disconnect Power and Open the Lid

Unplug the washing machine from the wall outlet. Open the lid fully. If the tub contains water, run a drain-and-spin cycle first, or bail out the water manually. You need the tub empty and the agitator visible.

Step 2: Remove the Agitator Cap

The agitator has a cap on top that conceals the mounting bolt. On most GE GTW models, this cap either pops off with a flathead screwdriver inserted under the edge, or unscrews counterclockwise (reverse-threaded on some models). Older GTW models use a fabric softener dispenser that sits on top — lift the dispenser straight up to remove it, then access the cap beneath.

Insert a flathead screwdriver under the cap edge and pry gently upward. Work around the perimeter if it resists. The cap is held by friction fit or a single snap tab. Once removed, you will see the 7/16" hex bolt that secures the agitator to the drive shaft.

Step 3: Remove the Agitator Bolt

Using a 7/16" socket on a ratchet extension (you need the extension to reach down into the agitator column), unscrew the bolt counterclockwise. This bolt threads into the top of the transmission drive shaft. On GE top-loaders, the bolt is standard thread (counterclockwise to remove) — not reverse-threaded.

The bolt may require moderate force if it has corroded from detergent and moisture exposure. If the bolt turns but the agitator spins with it, have a helper hold the agitator base while you turn the bolt.

Step 4: Pull the Agitator Out

With the bolt removed, grasp the agitator firmly at its widest point (around the lower barrel) and pull straight upward. The agitator sits on a splined drive shaft — it may require a strong pull if corrosion has formed between the splines and the agitator base.

If the agitator will not come off with hand force:

1. Fill the tub with 3-4 inches of hot water and let it soak for 15 minutes — heat expands the plastic agitator base slightly.
2. Rock the agitator side to side while pulling up — this breaks the corrosion bond.
3. As a last resort, use an agitator removal tool (a wide puller that hooks under the agitator base) — available at appliance parts stores for about $15.

Once free, lift the agitator out of the tub completely.

Step 5: Inspect the Drive Shaft

With the agitator removed, look down at the drive shaft protruding from the center of the tub. The shaft has splines (raised ridges) that mesh with matching grooves inside the agitator base. Inspect the splines for wear — if the splines are rounded or flattened, the drive shaft (part of the transmission assembly) is also worn. A new agitator on a worn shaft will strip again quickly.

Also check the shaft for corrosion. Clean it with a wire brush or fine sandpaper if needed. Apply a thin film of silicone grease to the splines before installing the new agitator — this prevents future corrosion bonding.

Step 6: Install the New Agitator

Align the splines on the new agitator base (WH16X29509) with the drive shaft grooves. Push the agitator down firmly — it should slide onto the shaft with moderate hand pressure. If it resists, rotate it slightly until the splines align. Do not hammer or use excessive force — the plastic agitator base can crack.

Once seated, the agitator should sit at the same height as the original — the base should rest against the tub floor with the upper agitator section extending above the tub rim by the same amount as before.

Step 7: Secure the Agitator Bolt

Thread the 7/16" bolt back into the drive shaft through the agitator center column. Tighten firmly — approximately 25 ft-lbs of torque. Do not overtighten, as the bolt threads into an aluminum or steel shaft and can strip. The bolt should be snug enough that the agitator does not wobble on the shaft.

Step 8: Replace the Cap and Test

Push the agitator cap back into place (or screw it on if threaded). Replace the fabric softener dispenser if equipped. Plug the washing machine back in.

Run a short wash cycle (Quick Wash or Rinse & Spin) to verify the new agitator engages correctly. Watch through the lid (GE top-loaders have a clear lid or you can briefly pause and lift the lid to check). The agitator should oscillate back and forth during the wash phase. On dual-action models, the upper section should rotate independently — grab the top while the bottom is still, and it should turn one direction but catch in the other (the directional dogs provide this one-way action).

Understanding the Dual-Action Agitator

GE's dual-action agitator has two sections that serve different purposes:

• Lower barrel (base section): Engages directly with the drive shaft splines. Provides the primary back-and-forth agitation that moves clothes through the water. This section moves with the transmission output.
• Upper auger section: Sits on top of the lower section, connected by directional cogs (dogs). The dogs allow the upper section to rotate in one direction (pulling clothes downward toward the center of the tub) but catch and hold in the other direction. This corkscrew action circulates clothes from the outside edges of the tub downward through the center.

When the directional cogs wear out (the most common agitator failure), the upper section spins freely in both directions — it no longer catches and pulls clothes downward. You will hear the upper section clicking rapidly during agitation with no resistance. The agitator dog kit (sold separately from GE) replaces just these cogs for about $5-$10, but many technicians recommend replacing the full agitator assembly since the labor is the same and the base may also be worn.

Troubleshooting After Installation

• Agitator does not move during wash cycle: The agitator may not be fully seated on the drive shaft splines. Remove and reinstall, ensuring it pushes down completely. If the shaft splines are worn, the agitator will sit but not engage.
• Agitator wobbles: The mounting bolt is not tight enough, or the agitator base has not fully seated on the shaft. Retighten the bolt. If it still wobbles, check the shaft splines for damage.
• Grinding noise during agitation: The drive shaft or transmission input may be damaged. A grinding noise from beneath the tub (not from the agitator itself) indicates a transmission or shift actuator problem — not an agitator issue.
• Upper section does not catch in one direction: The directional cogs were not installed correctly, or the cog slots in the upper section are worn. Disassemble and inspect the dog engagement.
• Agitator height is different than original: The base is not fully seated on the drive shaft. Push down firmly while rotating slightly to engage all splines.

When to Call a Professional

• If the drive shaft splines are stripped — this requires transmission replacement, which involves removing the tub and is typically not economical on older machines (repair cost often exceeds machine value).
• If the agitator removal reveals water beneath the tub center — this indicates a tub seal leak that will worsen and eventually require tub bearing and seal replacement.
• If the machine makes noise during spin but agitation is normal — the issue is likely the shift actuator or splutch assembly, not the agitator.

Cost Comparison: DIY vs Professional

Need Professional Help?

• washing machine repair service
• ge appliance repair
• washer repair cost guide

FAQ

Q: How do I know if the agitator or the transmission is the problem? A: Remove the agitator and run the washer. If the drive shaft oscillates back and forth (visible rotation), the transmission is working and the agitator was the issue. If the shaft does not move, the problem is in the transmission or shift actuator.

Q: Can I replace just the agitator dogs instead of the whole agitator? A: Yes. The directional cog kit is available for about $5-$10 and replaces just the dogs. Remove the upper agitator section (it lifts off the lower section), pop out the old dogs, and press in the new ones. This is the most common agitator repair and takes about 10 minutes.

Q: Will WH16X29509 fit all GE top-load washers? A: It fits most GTW dual-action agitator models, but not all. Some GTW models use an impeller instead of an agitator — these have a low-profile disc in the tub floor instead of a center post. Always verify using your model number from the rating plate.

Q: Why does my GE washer not clean as well after putting in a new agitator? A: If the new agitator is properly installed but clothes still come out dirty, the Deep Fill option may not be selected (insufficient water for the load size), the detergent type or amount may be wrong for an HE machine, or the drain pump may not be fully evacuating dirty water between cycles.

---

Need a certified technician? Book same-day repair →