2012 Ford F350 Super Duty Owner Guide 4th Printing - Page 306

Driving Using the electronic shift 4WD system (if equipped) 2H (2WD) - For general on-road driving. Sends power to the rear wheels only and 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. 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. 4L (4x4 low) will not engage while the vehicle is moving above 3 mph (5 km/h); this is normal and should be no reason for concern. Refer to Shifting to/from 4L (4x4 low) for proper operation. Shifting between 2H (4X2) and 4H (4X4 High) Move the 4WD control between 2H (4X2) and 4H (4X4 HIGH ) at any forward speed. The message center will display 4X4 SHIFT IN PROGRESS during the system shift. 4X4 HIGH will display in the message center if 4H is selected and 4X2 will momentarily display in the message center if 2H is selected. If SHIFT DELAYED PULL FORWARD is displayed in the message center during the mode shift, transfer case gear tooth blockage is present. To alleviate this condition, place the transmission in a forward gear and move the vehicle forward approximately 5 feet (2 meters) to allow the transfer case to complete the mode shift. Note: Momentarily releasing the accelerator pedal while performing a shift will improve engagement/disengagement times. Note: Do not perform this operation if the rear wheels are slipping. Note: Some noise may be heard as the system shifts or engages; this is normal. Note: 4X4 high mode is not intended for use on dry pavement. Shifting to/from 4L (4X4 low) 1. Bring the vehicle to a speed of 3 mph (5 km/h) or less. 2. Place the transmission in N (Neutral). 3. Move the 4WD control to the desired position. 306 2012 F-250/350/450/550 (f23) Owners Guide, 4th Printing USA (fus)