Dodge sturdy 3500 chassis with 360 5.9 engine, 4 spd car transmission. Outside and within shower. The way the shower works is the restroom doors expand and a removable shower pan is put on the floor and linked to a floor drain, a shower drape surrounds the individual bathing. This liberates more floor area inside the Recreational Vehicle. Those who want, may shower outsideBathroom has toilet and sink.