2010 Ford F350 Super Duty Super Cab Owner Guide 2nd Printing - Page 290

Driving WARNING: Do not leave the vehicle unattended with the transfer case in the N (Neutral) position. Always set the parking brake fully and turn off the ignition when leaving the vehicle. Using the Electronic Shift On the Fly (ESOF) 4x4 system (if equipped) Positions of the electronic shift system Note: Some noise may be heard as the 4WD system shifts or engages. This is normal. 2WD - For general on-road driving. Sends power to the rear wheels only. 4x4 HIGH - For winter and off-road conditions. Sends power to front and rear wheels. This mode is not intended for use on dry pavement. 4x4 LOW - For low-speed off-road applications that require extra power such as steep grades, deep sand or pulling a boat out of the water. Sends power to front and rear wheels. This mode is not intended for use on dry pavement. Shifting from 2WD to 4x4 HIGH Rotate the 4x4 control to the 4x4 HIGH position at speeds up to 55 mph (88 km/h). • The electronic shift 4x4 system is designed to engage 4x4 HIGH when the vehicle is moving. If shifted to 4x4 HIGH while at complete stop, 4x4 may not engage and the 4x4 indicator may flash continuously until the vehicle is allowed to move at a speed above 1 mph (1.6 km/h). • Do not shift into 4x4 HIGH with the rear wheels slipping. 290 2010 F-250/350/450/550 (f23) Owners Guide, 2nd Printing USA (fus)