So began one of the longest months of my life working until dark after work on this d@#$ed truck!
Yeah, that pretty much sums up jerking engine and tranny from a GMT360.
Since everything was out of the way, I decided to tackle the 4wd conversion. If the glass-eyed geeks at GM could do it, so could I!
I jerked the transfer case from an '05 TB, along with it's TCCM which is calibrated for 3.42s but it will work for the time being, you just have to be stopped for 4lo, but I'm getting ahead of myself...
Using this wiring diagram that I found on the net from a once-great forum, I began tying wires in where they go.
OK, now to some, this may look difficult, but it's actually quite awesome because, electrically, this is our 4wd system.
If one wishes to partake in this endeavor, remember to get BOTH "data" pigtails from the donor TB TCCM harness, and for time's sake, it's easier to just remove the entire wiring harness that runs from the ECM down along the driver's side frame rail, all the way back to the trailer plug. Once you get home, you can cut out what you need. You WILL need to run a few wires into the cab through the firewall grommet. I found that a cleaning rod to an AK works wonders here for fishing through it.
Use heat shrink on all your splices and wrap generously with loom tape or electrical tape, then replace the plastic loom.
I also gave myself an extra six inches for the encoder motor plug.
Once we got the new motor installed, which was incredibly easier than removing it
I got everything plugged in and we started testing. My TC switch indicator lights flash in any selection other than 2hi, this is because I do not have the disconnect solenoid hooked up yet, but everything works as it should!
Now, for those questions that may arise about the '06 into '02 swap.
The mass air sensor wasn't used. I did not re-wire my entire vehicle to accommodate the '06 computer, so it's an '06 engine being ran by an '02 ECM. This caused a small issue that others may not have. It's a slight stumble on light throttle application. It falls flat on it's face and then picks back up immediately, like a carbureted engine with too much accelerator pump. An updated stock tune has fixed this.
Also, all you '02 guys out there, swap your fuel rail with the new engine while it's out so everything hooks back up correctly.
Next up, are spacers, tires, body lift, and MOAR LIGHTS!!!
Bravada G80 3.73 converted to selectable 4wd.