2011 Ford F450 Super Duty Crew Cab Owner Guide 4th Printing - Page 299

Driving 2H (2WD) - For general on-road driving. Sends power to the rear wheels only should be used for street and highway driving. Provides optimal smoothness and fuel economy at high speeds. 4H (4x4 High) - Used for extra traction such as in snow or icy roads or in off road situations. This mode is not intended for use on dry pavement. N (Neutral) - Only used when towing the vehicle. No power to front or rear wheels. 4L (4x4 Low) - Uses extra gearing to provide maximum power to all four wheels at reduced speeds. Intended only for off road applications such as deep sand, steep grades or pulling heavy objects. Shifting from 2H (2WD) to 4H (4x4 High) Engage the locking hubs by rotating the hub lock control from FREE to LOCK, then move the transfer case lever from 2H (2WD) to 4H (4x4 High) at a stop or a vehicle speed below 3 mph (5 km/h). • For proper operation, make sure that both indicator arrows on the hub are aligned, and that both hubs are set to LOCK. • Do not shift into 4H (4x4 High) with the rear wheels slipping. • The vehicle should not be driven in 4X4 High with the hub locks disengaged as this condition may damage driveline system components. 2H 4H N 4L 299 2011 F-250/350/450/550 (f23) Owners Guide, 4th Printing USA (fus)