2005 Dodge Durango Owner's Manual - Page 227

STARTING AND OPERATING 227 or illuminates during driving, it means that the 4WD system is not functioning properly and that service is required. Proper operation of four-wheel-drive vehicles depends on tires of equal size, type and circumference on each wheel. Any difference in tire size can cause damage to the transfer case. Because four-wheel-drive provides improved traction, there is a tendency to exceed safe turning and stopping speeds. Do not go faster than road conditions permit. For additional information on the appropriate use of each transfer case mode position see the information below: AWD Normal All-Wheel-Drive High Range - Employs interaxle differential. Allows front and rear wheels to rotate at different speeds. All road surfaces. WARNING! Always engage the parking brake when powering down the vehicle if the Service 4WD light is illuminated. Not engaging the parking brake may allow the vehicle to roll which may cause personal injury. NOTE: Do not attempt to make a shift while only the front or rear wheels are spinning. The NV 144 transfer case is not equipped with a synchronizer and therefore the front and rear driveshaft speeds must be equal for the shift to take place. Shifting while only the front or rear wheels are spinning can cause damage to the transfer case. 5