There is only one answer and that's a manuel. Electric t-cases scare me, I do snowplowing and I can't afford a electrical mishap when the snow is flying. Also FWIW this NV271 shifts alot easier than my old 241HD. Just remember electronics burn out, short out, crap out, and so on. There for it's safe to say when it's time for 4WD you don't need any of the above to happen.