[Jowett Engineering]

The width of the 200 and Tundra diffs should be the same. Though that may not matter as the stock front differential could potentially be retained by locking the ADD sleeve.

Right now it appears as though the the electronic shift actuator on the 200 series case will plug right into the Tundra harness and possibly use the Tundra 4WD ecu. The actuator on both vehicles work in nearly identicle ways... the difference lies in what the first function does, on the Tundra it shifts the case from 2WD to 4WD, on the 200 it locks the center diff. A quick run through the manuals for both vehicles shows the same wires and signals are used to show 4WD in the Tundra and center diff lock in the 200. Basically the stock t-case switch on the dash would work like this 2WD = AWD, 4HI = center diff lock (with resulting light on the dash), and 4LO = 4LO.

The significant problems I see right now are what to do with the front ADD actuator and the resulting signals it sends to the ECU.... and what will the truck's traction control and stability systems do when power is flowing up front and potentially causing wheel spin when it thinks it is in RWD?