This module allows you to add the Mud Smart Mode to vehicles with the Smart-Lok™ Differential Kit sold as an accessory or to change to the Mud Smart Mode on vehicles equipped with a standard Smart-Lok™. The MUD mode has been specially designed to deliver superior traction in the deepest mud holes. When high engine torque and/or slippage is detected, Smart-Lok™ will fully lock the front end. The system will stay locked until throttle release. Only one Smart Mode Module can be installed at a time.