This system monitors various vehicle sensory inputs to provide an increased level of performance. This system offers two-wheel drive high, four-wheel drive auto, four-wheel drive high, and four-wheel drive low as available modes of operation. When you select four-wheel drive auto, the system continuously varies power to the front wheels for optimum performance for all on-road conditions. When you select either four-wheel drive high or four-wheel drive low, the system provides electronically locked power to the front and rear wheels for use in off-road or slippery conditions such as deep snow, sand or mud. Selecting four-wheel drive low also provides additional gearing for increased torque multiplication for conditions like deep sand, steep slopes, or pulling heavy objects.

Additionally, the system is capable of recreational flat towing by putting the transfer case into neutral (N).  See   Recreationally Towing Your Vehicle - Automatic Transmission.