2008 Ford F250 Owner Guide 4th Printing - Page 277

Driving Manual Shift On Stop (MSOS) 4x4 system (if equipped) The 4WD system is engaged or disengaged by rotating the control for both front wheel hub locks from the FREE or LOCK position, then manually engaging or disengaging the transfer case with the floor-mounted shifter. For increased fuel economy in 2WD, rotate both hub locks to the FREE position. • For proper operation, make sure that each hub is fully engaged and that both hub locks are set to the same position (both set to LOCK or both set to FREE). To engage LOCK, turn the hub locks completely clockwise; to disengage the hubs (FREE), turn the hub locks completely counterclockwise. • Some vehicles may be equipped with wheel ornaments that cover the 4x4 manual hub lock. These ornaments must be removed to access the manual hub locks. Electronic Shift On the Fly (ESOF) 4x4 system (if equipped) If equipped with the electronic shift 4WD System, and the instrument panel control is moved to 4X4 LOW while the vehicle is moving above 5 mph (8 km/h), the system will not engage and no damage will occur to the 4WD system. Before 4X4 LOW can be engaged, the vehicle speed must be below 5 mph (8 km/h) with the brake pedal depressed and the transmission in N (Neutral). If your vehicle is equipped with a manual transmission, the clutch pedal also must be depressed.This vehicle is equipped with a non-synchronous low range gearset which will not allow the transfer case to shift into 4X4 LOW if vehicle speed is above 5 mph (8 km/h). It is recommended that a shift to 4X4 LOW is performed while the vehicle is rolling at a speed below 5 mph (8 km/h). The 4WD system: • provides 4x4 High engagement and disengagement while the vehicle is moving. • is operated by a rotary control located on the instrument panel that allows you select 2WD, 4x4 High or 4x4 Low operation. • uses auto-manual hub locks that can be engaged and disengaged automatically based on the 4x4 mode selected. 277 2008 F-250/350/450/550 (f23) Owners Guide (post-2002-fmt) USA (fus)