1996 Ford Bronco Owner's Manual - Page 199

For example: If you were driving the vehicle forward in 4x4, the automatic locking hubs will disengage the next time the vehicle is driven in reverse in Two-Wheel Drive for approximately 10 feet (3 meters) in a straight line. If you were driving the vehicle in reverse in 4x4, the automatic locking hubs will disengage the next time the vehicle is driven forward in Two-Wheel Drive for approximately 10 feet (3 meters) in a straight line. Operating in two-wheel drive mode with the hubs locked increases fuel consumption, noise, vibration, and wear. For prolonged two-wheel drive operation on dry pavement, disengagement of the automatic locking hubs, which is not required for two-wheel drive operation, stops all movement of front-wheel drive components while operating in two-wheel drive. To shift from 4x4 to 4x4 LOW RANGE: Stop the vehicle and place the automatic transmission in NEUTRAL or depress the clutch on vehicles with a manual transmission. Push the LOW RANGE button on the instrument panel to shift the transfer case from 4x4 to 4x4 LOW RANGE. Both the 4x4 and LOW RANGE lights are now lit. NOTE: The vehicle must already be in 4x4 before pushing the Low Range Button. 199