In reality, this turned into a full-on rebuild project - with several parts orders, not just a simple repair. But I have to give credit: The parts listings with pictures on the AppliancePartsPros web site were really useful in figuring out what was going on inside the machine, and what parts I would need.
Also: The repair videos were critical for me to be able to ensure I was reassembling everything correctly. Shout out to Simon, who was featured in several of the repair videos. His "gorgeous wooden box" and his habit of setting a part aside "where the kids won't play with it" are really humorous late at night, when I'm trying to get things back together!
This was a challenging repair - largely because my washer is 25 years old. But the reputation of the Whirlpool direct drive design convinced me it was worth the effort to bring it back to life. Getting the tub nut and block apart without damage is difficult on old machines.