I'm sure everyone is sick of my auto tranny questions by now, but I have learned allot (and the more I learn the more I realize I don't know). Can someone break down the above tranny's/t-cases for me? I understand that the 350's and 400's are 3speed and the others are overdrive, but other than that... what should I know, and if I am converting my daily driver to auto from 4 speed, what combo do I want? As a side note, if the tranny I get does not have a torque converter which one should I get? Thanks a trillion billion.