Re: E40D Pump Question
It's not just likely the pump is destroyed, it's almost a certainty. And now that you've tried to drive it while it was slipping there is a good chance you've damaged or destroyed some of the clutches. All of the priming in an automatic transmission takes place in the first one to two seconds after the engine starts. If the trans doesn't work right out of the box STOP and figure out what's wrong. Driving it just causes more damage.
I recommend pulling the trans again and tearing it down to see if any of the frictions are damaged. I'll bet that at least the forward clutch needs to be replaced.
Former Ford Automatic Transmission Engineer
“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson