Just found this thread... let me know if I can help with your 4406 wiring.
V8,
I am confused about one thing, in one of your threads you mentioned the neutral tow kit to engage the 4high clutch, did you ever get this to work?
Something else I've been thinking about, I assume the shift motor is some sort of stepper or servo, likely with a wire to trigger each position, couldn't the GEM be used only for A4WD then a nice rotary switch in my overhead console for 2WD, A4WD, 4HI, 4LO and using the front axle disconnect 2LO? Call me crazy but I like options. I'd love to use a fuel cell where the spare tire is and install an electric shift doubler of some sort, oh well maybe down the road.
Another switching option would be to use the V8 stereo surround (no switch) and check the pinout on the Expedition switch and install it up there with a rocker for front axle disconnect. Then I could extend the harness from the V6 switch up there for a neat and clean install. Maybe burn a screen and screen print the different positions of each switch. Definately need running lights, fog lights, aux backup lights, and trailer backup lights (driving lights on my trailer). I'll leave room for air locker switches just in case I go that route down the road.
Trouble is I'm not sure what I want to do with the truck other than winter driving and occasional trail riding. I can't lift it much unless I want to park it outside my low garage (Expedition is 1 inch too tall). I just figure now is the time to plan for future upgrades, kind of a "while I'm in there" thing. For now I know I want the Expedition TC cause I love the one i've got and I've always wanted a paddle shifted car/truck. I actually semi designed a sequential shifter for a Ford top-loader back in my drag racing days but stopped racing before I built it. A new baby got in the way of that one. This trucks sort of gonna be dad's winter hot-rod or for days when I need to haul more than one of the girls as the P-car has no rear seat belts.
I expect to have both harnesses on the floor later in the week, I'll take a look more closely then. I think I or my buddy can fix the harness I cut pretty easily, I only damaged about 4 wires out of the 20 or so in it.