What have I got myself in to? Denver here we come!!

Not true. I removed all of the anti lock brake wiring from the harness when I removed the air bag wiring and evap crap. The only thing that does not operate is the speedometer because the ECM uses the sped sensor on the rear diff in the truck. My trans shifts just fine and the converter locks up just like it should. I have contemplated getting an axle from a grand Cherokee and cutting down to put in the car. It just isn't a priority. I have been living without an operating speedo now for a long time and it doesn't bother me. If I really want to know how fast I'm going I turn on my speedo app on my iPhone. The abs module has nothing to do with the operation of the transmission. Not like the Nag1 in the Lx cars.

OK, I was able to verify this 100% today. 74TT also has an RE trans ( 44RE to be exact ) and also has no diff speed sensor or ABS computer.
AAANNNDD after tonight, mine shifts as well...BUT I don't really know what I did to fix it. Filter change, solenoid cleaning ( although it was super clean to begin with and new fluid ( but that was clear and red already as well ).
I did go back through all of my wiring and leave the computer unplugged for a couple of days so that could have something to do with it, but I doubt it.