POSI-LOK

4WD ON THE FLY! 4x4 Posi-Lok is a "POSI"tive engagement device that replaces failure prone factory vacuum or electric front axle engagement systems. 4x4 Posi-Lok is simple and easy to install, and allows you to manually engage your 4 wheel drive--while sitting still or on the fly--from inside the cab for true 100% engagement every time. Posi-Lok works with manual-lever or electric push-button type transfer case systems.