yeah similar to the landcruiser escalade and denali, but in all wheel drive, without trac, unless there is a viscous coupling, you can lose power to 3 wheels.
that is because the trnsfer case isn't locked. with the transfer case locked (which you call 4wd) you can still lose power to 2 wheels, 1front and 1rear.
i think there is some confusion in the names. awd, 4wd, fulltime 4wd(landcruiser)