i just know about what youve described, deffinatly dont need a pcm to run that tranny. the pressure switches are so it will automaticly switch into overdrive and automaticlly lock up the convertor. Most poeple just set up 2 switches. one for overdrive and one for the lockup. it would be a 2 pushbuttons on your dash or wherever. when you want it to shift into overdrive just hit the button... same same for the lockup. (thats what those to plug ins on the tranny are for. If you wanted it to be all autolike factory your could do the same thing except with the pressure switches doing all the work. but that just seems like a big headake to me.