okay so I have a automatic transmission, I want to control it without a computer if I can so I found something called a manual valve body. my understanding of it is you bolt it in place and you select the gear you want to use and it makes the tranny select the proper gear. So it will work just like that? the tranny is a 4l60e from a 94 camaro

i dont know much about trannies..

i think i want a reverse manual valve body.
are there any complications with these?
what are your experiences with these?
something about running full line pressure? is that bad?