Replace your Jeep Wrangler vacuum-actuated axle engagement with a 4x4 Posi-Lok. Fits 3”-plus lifted Wrangler YJs. The cable-operated actuator puts you in control of axle engagement from inside the cab. A one inch pull of the 4x4 Posi-Lok cable connects the right front axle to the intermediate shaft using the shift collar and fork -- 4-wheel drive is engaged. Features a discreet das h mounting system, cast aluminum central disconnect system housing and dash indicator wiring. Easy to follow instructions.