The Windy City Age: 41 Posts: 8,807 The various Jeep 4wd systems From Wikipedia, the free encyclopedia Jeep uses a variety of four-wheel drive and all-wheel drive systems on their various vehicles . Contents 1 Command-Trac 2 Selec-Trac 3 Quadra-Trac 4 Quadra-Drive (WJ) 5 Quadra-Trac II (WJ) 6 Quadra-Trac I (WJ) 7