Wasn't someone working on that before and figured out the electromagnetic clutch portion would always transfer a little power to the front or something? Would be awesome for some folks to be able to have 2wd, 4hi, 4lo and normal tod, be nice for 2wd on nice sunny days but pop it in tod for rough weather (snow, rain etc) without being in full 4wd. I like having the simplicity of the manual case and then I can drop in some lower t-case gears.