2013 Ford F150 SuperCrew Cab Owner Manual Printing 3 - Page 226

Four-Wheel Drive (If Equipped) 225 Note: Some noise may be heard as the system shifts or engages; this is normal. Note: 4x4 low mode is not intended for use on dry pavement Electronic Locking Differential (ELD) (If Equipped) Note: The ELD is designed for off-road use only and is not intended for use on dry pavement. Using the ELD on dry pavement will result in increased tire wear, noise and vibration. 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 within the ELD operating speed range. 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 ELD will not engage if the vehicle speed is above 20 mph (32 km/h) in 4x2, 4x4 Auto, or 4x4 High modes. • The ELD will not engage if the vehicle speed is above or 56 mph (90 km/h) in 4X4 Low. • The ELD will not engage if the accelerator pedal is pressed beyond 50% during an engagement attempt • In 4x2, 4x4 Auto, and 4x4 High modes, the ELD will automatically disengage at speeds above 25 mph (41 km/h) and will automatically reengage at speeds below 20 mph (32 km/h). • In 4L (4X4 low), the ELD will automatically disengage at speeds above 62 mph (100 km/h) and will automatically reengage at speeds below 56 mph (90 km/h). • The AdvanceTrac system has the ability to take over control of the ELD and disable it during driving maneuvers when necessary. If the required conditions for ELD activation are not met when the switch is actuated, the instrument cluster will display the appropriate information guiding the driver through the proper ELD activation process. 2013 F-150 (f12) Owners Guide gf, 3rd Printing, February 2013 USA (fus)