OK, the part came, I installed it yesterday, and everything seems to work---at least through the first wash, with no leaks. That's the good news.
The bad news comes in two parts:
(1) That U-tube video sucks. For example, it took me over an hour to pry the pump out of the tub, with a crow bar, no less, and by cutting away most of the rubber gasket with a box knife. Also, he didn't say anything about how to disconnect the thermister or power line. I had to figure that out by myself.
(2) I then disassembled the old pump to see what was wrong, expecting to see food or a piece of glass blocking a rotor. Wrong! The problem was that what looked like a fiber washer seated around the rotor shaft had totally disintegrated, now having the consistency of dirt. The result was that everything had corroded so that the rotor could barely turn. I took some photos of the damaged parts.
So my question to you is, Is this normal wear, or is it a design defect that I can ask for compensation from Kenmore, even though it is out of warranty?