Most of the time, full-time 4WD works pretty much the same way as AWD: the center differential sends engine power to both the front and rear wheels all the time.
Karamihan ng panahon, full-time 4WD gumagana pretty marami sa parehong paraan tulad ng AWD: ang sentro na kaugalian ay nagpapadala engine kapangyarihan sa parehong harap at likod na gulong sa lahat ng oras.