This was a pretty simple repair. In this case, the part purchased here was not the actual problem, but had to be disturbed to fix another problem. After many years, corrosion and exhaustion of grease caused the bushing on the agitator shaft to seize, and the belts to slip. In this model machine, the bushing is accessed by first removing the agitator, which is held on by a single 1/4 inch set screw, and then removing the agitator seal, which is held in by a little spring clip on top of a washer. It's soft rubber, and you will probably need a small screwdriver or pocket knife to pry it out. In this case, the bushing was not too bad, so I was able to clean the hardened grease out and free it up with a little oil, using vise grips to rotate the agitator shaft, until the oil worked in enough.
Since seals don't like to be disturbed and reinstalled, and this one requires some prying to get out, I bought a new seal, even though the old one did not leak when I temporarily reinstalled it. There is a spring inside the seal, and it is packed with grease. The new seal comes with the spring and the grease already in it, so all that is needed is to slip it over the shaft (the top has some print embossed on it, making it easy to remember which is the top), press the washer down on top of it, and replace the spring clip.Slip the agitator back on its shaft and retighten the set screw, and you're back in business.
Run the machine, and check the area where the transmission enters the bottom of the tub. There's a little weep hole there, and if the seal leaks, you'll see water coming out there.
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