2012 Ford F250 Super Duty Owner Guide 4th Printing - Page 303

Driving Using a Manual Shift On Stop (MSOS) 4x4 system (if equipped) Note: High shift efforts may be encountered when attempting to shift into and out of 4x4 modes. It is recommended to allow the vehicle to roll at a speed below 3 mph (5 km/h) when shifting between modes. Note: Some noise may be heard as the 4x4 system shifts or engages. This is normal. In order to reduce engagement noise, it is recommended that all shifts be performed at speeds below 3 mph (5 km/h). 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. 303 2012 F-250/350/450/550 (f23) Owners Guide, 4th Printing USA (fus)