Wow, you don't wast any time
2 observations:
1. Again sorry if this is obvious, but since this is trial and error, can you use the various speed sensors to ensure the clutch packs engage fully? i.e. clutch pack input rpm/output rpm = a known gear ratio.
2. Is line pressure rpm dependent, and does that affect pwm duty cycle?
3. when you disabled the valves in reverse, the output shaft doesn't look like it changed direction. Is that "normal"?
This is interesting also because a lot of people would like to make their ICE automatics behave more like a manual if they could do so short of a transmission swap.