Bingwsguy,
My gram's model 142 had the same problem as yours. It's practically the identical model, just a year or two older. It was the "indestructible" poly pump. It would never have been obvious until it actually froze during a spin. I am lucky the motor didn't burn up. I changed the pulleys, belts, you name it, but never suspected the pump. It also fixed the sort of sluggish agitation that would happen periodically. I recommend changing the pump. They are about $50, and you will need to drill a hole into the bleach dispenser opening on the pump top. The directions are on the pump packaging. I just propped up the front of the machine and didn't need to tip the washer over to change it. Incidentally, my machine is in Syracuse, and it has been going nonstop since 1961!
Bobby in Boston (but born and raised in Syracuse)