Byron, I PM'ed you thinking that you wanted to do this for towing is that what it's for or is it for racing?
If it for racing you only need to hook up a switch, but the shifter needs to be in Drive.
If your trying to do it for towing, by manually putting the selector into 2nd then it will take VB mods. We don't like sharing how because if it's done incorrectly the VB is junk. Call me at the shop if you need a hand.