The Whirlpool direct-drive transmission is a marvel of mechanical engineering. It’s one of the best things Whirlpool ever designed, and it’s the reason these machines routinely lasted thirty years or more in service. There are still a lot of them out there. One of the things that can fail inside is the neutral drain system — and when it fails, the machine punishes itself every cycle until you fix it. Here’s how it works, how to diagnose it, and how to rebuild the transmission with the kit.
Watch the Full Rebuild
What the Neutral Drain Does
In a healthy machine, the cycle goes: agitate, pause, drain the water out of the tub, pause again, then shift into spin mode and spin the clothes dry. The two pauses are what the neutral drain controls. During those pauses, the transmission is in neutral — the motor is running but the basket isn’t engaged, so the machine can pump water out without the basket fighting against it.
When the neutral drain fails, the machine skips the pause and goes straight from agitate into spin while the tub is still full of water. The basket tries to spin a heavy load of soaked clothes against the resistance of all that water. The clutch and the motor take the punishment. Your clothes still come out wet because the spin started before the drain finished. Then the next cycle does it again. The clutch wears out faster than it should, and a lot of people don’t realize what’s happening until the clutch dies and they assume the whole machine is shot.
Confirming the Diagnosis
Run the machine through a normal cycle and listen at the end of agitate. A healthy machine pauses, you hear water draining for several seconds, then it pauses again before the basket starts to spin. A failed neutral drain skips those pauses — you’ll hear the motor change direction and the basket starts coming up to speed while water is still in the tub. Once you’ve heard it a few times the sound difference is unmistakable.
Other tells: clothes come out heavier and wetter than normal. The machine vibrates harder during the early part of spin because of the unbalanced water load. The clutch starts slipping noticeably after a few months of running this way.
Pulling the Transmission
This is a multi-hour job for the novice. Unplug the machine, remove the agitatorand cabinet, disconnect water, and lay the washer on its back so you can work on the underside. Remove the motor (two clips), the pump (two clips), and disconnect the harness. The transmission unbolts from the bottom of the basket frame (three half inch bolts).
I made myself a holder for the bench out of a five-gallon bucket and a couple of pieces of 2×2 lumber. Then I cut the 2x2s to match the curve of the inner edge of the bucket body. I laid them over the top of the bucket, traced around them with the transmission sitting on top, cut the curves out on the band saw, and screwed them inside the rim of the bucket. The transmission sits in the holder, the case can come off in either direction, and I can tip it over to drain the old oil straight into the bucket. If you’re going to rebuild more than one of these in your shop, build the bucket stand — it pays for itself the first time.
Inside the Case
The case has a bunch of screws around the perimeter — count them as you take them out and keep them together. Tilt the transmission over and drain the old oil from the reservior. Remove the snap ring that holds the spin gear in place being careful not to loose it. Next, take out the spin gear and the components beneath it. Remove the Allen screw from the plate under the spin gear and replace it with the new one in the neutral drain kit. Replace the parts of the neutral drain making sure the word UP on each part is oriented correctly. There’s a notch in the gear plate that takes a screwdriver tip — jam the screwdriver into that notch and you can apply torque to the Allen bolt without the gear rotating.
The new Allen bolt that comes in the rebuild kit has blue Loctite on the threads already. Don’t add more.
The Two Plate Variants
Inside this transmission you’ll find one of two slightly different plate designs. They look similar at first glance, but the bolt holes don’t line up the same way. There’s a common version (the one most machines have) and a less-common version that uses a different-size Allen bolt. Match the plate you pull out to one of the two varients that come in your kit before you start reassembly — if the holes don’t align, you’ve got the wrong plate and you need to use the other variant.
The mechanism that actually controls the neutral drain is hidden under the wheel inside the transmission. Whirlpool put out a service technician’s pamphlet on how it works — it’s worth reading if you want to understand what’s happening on a cycle-by-cycle basis. The short version: there’s a small clutched pawl that engages or disengages based on motor direction, and when it wears, it loses the ability to hold neutral.
Reassembling and Refilling
On this particular transmission, the gear oil that came out looked nearly clean, so I didn’t change it. If yours is dark, contaminated, or thin, drain it and refill with fresh transmission oil. Inside the gearcase there’s a shelf — when the oil level reaches the edge of that shelf, you’re full. Capacity is about 16 fluid ounces of heavy gear oil (85W-90W) or the original gear oil sold by Whirlpool. Don’t overfill; the transmission needs an air space for the gears to splash through the oil correctly.
Replace the case gasket with oil resistant sealer being careful to apply sealant to the inside edge of the screw holes. Reinstall the motor, the pump, the harness, and stand the machine back up. Run a test using the agitation mark on the console placard pausing between agitation and spin. Select the agitation mark on the dial and using a lid switch bypass pull the timer on. The machine should agitate. Push the dial off, let things come to a complete stop and pull the dial on again. If the neutral drain works the spin basket will now be engaged and the machine will spin.
What You Need
- 388253A Neutral Drain Kit (Whirlpool Direct Drive) — Search on Amazon
- Transmission Gear Oil — Search on Amazon
- Blue Threadlocker (for the Allen bolts if not pre-applied) — Search on Amazon
- Allen / Hex Key Set — Search on Amazon
- Fluke 101 Digital Multimeter — Search on Amazon
Disclosure: As an Amazon Associate, I earn from qualifying purchases made through the links in this post. It costs you nothing extra and helps support the channel.
Tackling this rebuild yourself? My Whirlpool Direct Drive Transmission — Neutral Drain Kit Replacement Field Repair Guide walks through the entire rebuild step by step — pulling the transmission, opening the case, identifying the formal Whirlpool parts (rack retainer, shoulder pawl stud, trip lever, spin pawl, spin latch, counting cam), matching the correct plate and stud from the kit’s two variants, sealing the case, and testing the repair. Cross-references the Whirlpool Job Aid L-55 service pamphlet. PDF download, $9.99.
Rather have a pro do it? If you’re anywhere in central Louisiana — Oakdale, Oberlin, Elizabeth, Pitkin, Pine Prairie, and Glenmora — Harper & Knowles handles this all the time. Call (337) 831-6757 or visit harperandknowles.com to schedule a service call.
About the Author: Chip Knowles owns Harper & Knowles Washing Machine and Dryer Repair LLC in Oakdale, Louisiana. New video every Sunday at 2 PM Central on YouTube.