Thank you for your answer. However, it was a good start, & it was the tip of the iceberg. I was able to remove the water pump drive belt (despite it's age, it was not cracked & I even treated it with an old "Cling-Surface" Fan & V-Belt Dressing for better grip), & the pump did, manually rotate freely by pulling on the belt. It looked encouraging. The washer was stuck at the final rinse pump-out part of the cycle, and after doing what you recommended, it worked !! I was really encouraged.
The true test was doing a 2nd load of laundry. My wife put in a 2nd load, & it AGITATED untill it had to pump out the wash water, & the very same problem occured again! ??? The machine would NOT pump out the water? Very confusing, because the same motor that does the agitating also pumps out the water !!?
I discovered that the tub rotation / agitation was difficult, & I assumed that the bottom support bearing was a sealed bearing. [ Tip for you >] I lifted the rubber cover seal with a screwdriver to access this bearing; & then dribbled some SAE 90 WT oil onto the shaft to see what would happen; &, LO, it went down, into the bearing !"
Over several hours, I kept slowly, loubing this shaft / bearing w oil (I didn't want it to leak out the bottom?, onto the tub drive belt / floor; which, so far I have not seen), & manually moving the tub to work the oil into the bearing. The tub / agitator rotates MUCH MORE easily now, but I still have then SAME, #$%&^@, problem !! ?? When it needs to pump out water, the motor grinds, & nothing happens!!
How can the same motor work the agitation phase, but not the water pump-out phase ???
I've got to go now; thank you for your advice.