Transmission options and opinions

Seventy-three.Seventy-four,seventy-five, seventy-six, maybe seventy-two,seventy-seven......When did they go to lock-ups? Ninteen-eighty I think it was.When did the PTKD come in? Seventy-one I think it was.
If you get the pressures and that valve, set just right, the car is a joy to drive.