2009 Ford F150 Owner Guide 3rd Printing - Page 300

Driving The message center will display 4X4 SHIFT IN PROGRESS during the shift. The message center will then display the system mode selected. If any of the above shift conditions are not met, the shift will not occur and the message center will display information guiding the driver through the proper shifting procedures. If 4X4 SHIFT IN PROGRESS is displayed for more than five seconds, transfer case gear tooth blockage is present. To alleviate this condition, move the vehicle forward approximately five feet (2 meters) to allow the transfer case to complete the shift. Note: Some noise may be heard as the system shifts or engages; this is normal. Electronic locking differential (ELD) (if equipped) The electronic locking differential (ELD) is a device housed in the rear axle which allows both rear wheels to turn at the same speed. The ELD can provide additional traction should the vehicle become stuck. The ELD is electronically activated by the driver and can be shifted on the fly. It is intended for use in mud, rocks, sand, or any off-road condition where maximum traction is needed. It is not intended for use on dry pavement. The ELD is affected by the following conditions: • The 4WD control must be in either 4H (4X4 High) or 4L (4X4 Low) mode. • The ELD will not engage if the vehicle speed is above 20 mph (30 km/h) in 4X4 High or 56 mph (90 km/h) in 4X4 Low. • In 4H (4X4 High), the ELD will disengage at speeds above 25 mph (40 km/h) and will automatically reengage at speeds below 20 mph (30 km/h). • In 4L (4X4 Low), the ELD will disengage at speeds above 62 mph (100 km/h) and will automatically reengage at speeds below 56 mph (90 km/h). The ELD is designed for off-road use only. 300 2009 F-150 (f12) Owners Guide (own2002), 3rd Printing USA (fus)