In the interest of those searching in the future I will update this.

I now have a working transmission. I also had the opportunity to replace the parking lever seal and the spring in the valve body, which had been in 3 pieces. Improvement but it never shifted that bad, surprisingly. Also replaced the conductor plate. I don't think it was necessary from what I found later but at this point with where I was on the project I saw it as preventitive maintenence.

To recap this began when I replaced the trans elec input plug. Trans immediately went into hard limp mode, clearing codes (via 38 pin socket) wouldn't resolve. Remove connector again and find a wire disconnected from its pin. This wire was about 2inches shorter than the others and the plug I removed had the 2nd update color o-rings which leads me to believe that I disturbed a improperly fixed mistake from my cars previous life. This harness will be replaced. New extension soldered/shrink wrapped and the trans is now mechanically fixed.

Still in limp home mode. Purchase car soft 7.4 multiplexer and usb to serial converter. Edit the characteristics of the comm port and clear the code with carsoft. The stored codes all related to the speed sensor, which in this case was a false reading to the conductor plate due to the damaged wire hiding under the cap of the elec connector. Car is no longer in limp mode and shifts perfectly.

This was my experience fwiw