The air-lock differential is a replacement differential for your vehicle. It can operate both as a conventional differential and as a 100% locked differential — front or rear. When engaged, it locks both half-shafts and thus distributes drive force to both wheels 50% : 50% for maximum traction. The locking mechanism is controlled by the driver via a button on the dashboard of the vehicle. The front lock can be activated when driving on slippery surfaces with reduced traction and deactivated when driving on surfaces with good grip, in order to maintain optimum steering control. For safety reasons, the front lock cannot be used unless the rear is activated.
 
What the kit includes
The kit contains everything necessary for installing the differential lock, plus instructions for the installation. We recommend installation at an authorised service centre. The seller provides a 3-year warranty. 
 
Technical details
Weight: 15 kg 
Dimensions: 28 × 28 × 28 cm 
Vehicle compatibility: Many Jeep models including CJ (5, 6, 7 & 8), YJ & TJ Wrangler, XJ Cherokee, XJ Wagoneer, ZJ, WJ Grand Cherokee, JK Wrangler (non-Rubicon models), KJ, KK; Jeep Liberty, Cherokee — all with Dana 30 27-spline and gear ratio 3.73 or higher — for front axle lock. 
 
How it works
Because the lock is activated with compressed air, a compressor or other source of compressed air is required. The compressor is triggered by the driver via a dashboard button. The pressure in the air-expansion tank is monitored by a regulator and works in the range of 5.9 bar to 6.9 bar. When the air-lock button is pressed, the pneumatic valve opens and allows the compressed air to reach the differential via an air line that connects them.