auto trannys are either dirt cheap or free cuz no one wants one


after much head scratching and what not, i've narrowed it down to a few possibilities....
1 - the TCU is bad
(bad or disconnected 2-5)
2 - inhibitor switch
3 - the over drive switch
4 - the kickdown switch
5 - the idle switch

I don't want to work on parts that don't need it (TCM) so, anybody know where 2-5 are and how to test them?

thanks