[Accelo]

I am in the process of helping out a fella right now. He didn't get his converter in all three clicks. Never pumped an ounce of oil as the converter and oil lines to the radiator were completely dry. (I want to acknowledge your issue is different as your at least ran).
Still haven't gotten the pump out to inspect the carnage. My point is they can fail in many different ways. Each has to be inspected and a decision made on the evidence. I do know he has a new GM pump to install.
Good luck.