jesse jay

A few months back i had tranny problems it started out as it feeling like the tranny was slipping but after a while it felt like the tranny would compleetly go out and i had no power but it was actually down shifting into a lower gear, and eventually it stop shifting all togeather, i could put it in drive but it would stay in first no shifting what so ever. i could put it in revers and park thats it.
so i talked to some people and they said to swap out the tranny and i did. all that work and to guess it didnt fix the problem. so i talked to some more people they said maybe the TCU so i unpluged it and i could shift it manually with the TCU disconected. when i finally got around to getting a new TCU and put it in guess what, didnt work. i've been throwing arrows in the dark, i herd that disconecting the TCU also disconects the TPS and that the TPS could be my problem from day one. or a wiering isue i dont know what to do, i can try and change the TPS but dont know where its at or anything.
What do you guys think?