4x4 Posi Lok for Jeep with 3 inch to 6 inch Lift. Fits: 1987-1995 Wrangler YJ 1984-1991 Cherokee XJ 1986-1991 Comanche MJ What is a 4x4 Posi-Lok A permanent replacement for the failure prone O.E. vacuum and electric front axle engagement systems Allows you to engage the front axle from inside the cab Engagement every time because you are in direct control A 1" pull of the cable ensures you will have 4-wheel drive when you need it, as long as the transfer case is engaged. Its not a Posi-Trac or locker Simple and easy to install A patented front axle engagement system