How to Replace a GE Top-Load Washer Agitator
A GE top-loader whose upper agitator spins freely, grinds, or no longer moves clothes needs a new dual-action agitator, part WH16X29509. It is a beginner-to-intermediate swap of about 20 to 30 minutes with a single 7/16-inch bolt.
How the agitator fails#
GE's GTW top-loaders use a two-piece dual-action agitator: the lower barrel drives the main back-and-forth wash, while the upper auger rides on directional cogs, the dogs, that let it turn one way to pull clothes down through the center. When those dogs wear, the upper section spins freely both ways and clicks rapidly without moving laundry, which is the most common failure. A cracked base or a stripped spline will also drop wash performance. WH16X29509 fits most dual-action models, including the GTW465, GTW485, GTW680, and GTW750 series, but verify your model on the rating plate since some GTW units use an impeller instead.
Before you start#
| Category | What you need |
|---|---|
| Tools | 7/16-inch socket and ratchet with an extension, flathead screwdriver, pliers (optional) |
| Part | Agitator assembly WH16X29509 (or the directional-dog kit alone if only the cogs are worn) |
| Time and level | 20 to 30 minutes, Beginner to Intermediate |
Safety warning: Unplug the washing machine before starting. Do not reach under the agitator while the machine is connected to power.
Do You Have the Right Tools?
Bearing puller set ($120), drum spider wrench ($85), multimeter ($85), and diagnostic software. Our technician arrives with $3,000+ in professional tools — your diagnostic is free.
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Step-by-step#
1 - Empty the tub and open up. Unplug the washer and open the lid. If there is water, run a drain-and-spin or bail it out so the tub is empty and the agitator is clear.
2 - Remove the cap. The cap on top hides the bolt. Pry gently under its edge with a flathead, working around the rim, since it is held by a friction fit or a snap tab; on older models lift off the fabric-softener dispenser first to reach it.
3 - Remove the bolt. Drop a 7/16-inch socket on an extension into the agitator column and turn the standard-thread bolt counterclockwise. If the agitator spins with the bolt, have a helper hold the base while you break it loose.
4 - Pull the agitator. Grip the lower barrel and pull straight up off the splined shaft. If corrosion has it stuck, add a few inches of hot water for 15 minutes to expand the plastic base, then rock it side to side while pulling; an agitator puller is the last resort.
5 - Inspect the drive shaft. Look at the splined shaft in the tub center. Rounded or flattened splines mean the shaft, part of the transmission, is worn and a new agitator will strip again. Clean off corrosion and wipe a thin film of silicone grease on the splines before fitting the new part.
6 - Fit the new agitator. Line the base splines up with the shaft grooves and push down with moderate hand pressure, rotating slightly to seat it; never hammer it, since the plastic base can crack. It should sit at the original height.
7 - Torque the bolt and test. Thread the 7/16-inch bolt back in and tighten it firmly to about 25 foot-pounds, no more, since it threads into a metal shaft that can strip. Refit the cap and dispenser, plug in, and run a short cycle: the lower barrel should oscillate, and on dual-action models the upper section should catch one way and free-wheel the other.
Troubleshooting after the swap#
- Agitator does not move: it is not fully seated on the splines. Pull and reseat it, pushing all the way down; if the shaft splines are worn it will sit but not engage.
- Wobble: the bolt is loose or the base is not fully down. Retighten and confirm the base is seated.
- Grinding from beneath the tub: that is the transmission or shift actuator, not the agitator.
- Upper section does not catch one way: the dogs are misinstalled or the cog slots are worn. Split the sections and inspect.
Safety First — Know the Risks
High-voltage components and pressurized water lines create flood and shock risk. A single loose fitting can cause thousands in water damage. Our techs are licensed and insured — let them handle the risk.
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Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
