I don't think..at least by reading the manual when it was running on my computer...that you have to remove Tcase....I believe it was saying that you remove either the Transmission pan or the convertor sump pan....?
but from there I guess you just be careful of the wire harness and then unbolt old one??? Just thought maybe someone actually knew for sure and if they did they could give a brief description/walk through.

I guess the other question would be....

WHICH WIRE UNDER THE PASSENGER SEAT IS THE WIRE TO TAP IN TO HOOK UP A TOD OFF?ON SWITCH??? Some of you want to answer in vague smart coments ..so I will get things out now

YES- I know it is under the passenger seat
YES- I want to hook up a switch to turn TOD off and on at flip of said switch
YES- I know to turn TOD off and on with said switch that I must hook up a switch to the TOD wire under the passenger seat.
NO- I don't know which wire is the wire that a switch must be hooked to to disconnect TOD off/on with a flip of the switch
YES- I know how to hook up the switch and I know how to wire the switch