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. The center differential allows the front and rear drive shafts to move at different speeds, allowing the vehicle to operate normally, even when making turns on normal driving surfaces.
Zaidi ya muda, muda 4WD kazi pretty much njia sawa AWD: kituo cha tofauti hutuma injini nguvu kwa wote mbele na magurudumu ya nyuma wakati wote. kituo cha tofauti inaruhusu mbele na nyuma ya gari machimbo ya kusonga kwa kasi tofauti, kuruhusu gari kwa kazi kawaida, hata wakati wa kufanya zamu juu ya nyuso kawaida ya kuendesha gari.