2014 Ford F150 SuperCrew Cab Owner Manual Printing 1 - Page 161

Rear Axle LIMITED SLIP DIFFERENTIAL (IF EQUIPPED) • This axle provides added traction on slippery surfaces, particularly when one wheel is on a poor traction surface. Under normal conditions, the limited-slip axle functions like a standard rear axle. The axle may exhibit a slight noise or vibration during tight turns with low vehicle speed. This is normal behavior and indicates the axle is working. • • ELECTRONIC LOCKING DIFFERENTIAL (IF EQUIPPED) • Note: The electronic locking differential is for off-road use only and is not for use on dry pavement. Using the electronic locking differential on dry pavement will result in increased tire wear, noise and vibration. The electronic locking differential is a device housed in the rear axle that allows both rear wheels to turn at the same speed. The electronic locking differential can provide additional traction should your vehicle become stuck. You can activate the differential electronically and shift it on the fly within the differential operating speed range. The differential is for use in mud, rocks, sand, or any off-road condition where you need maximum traction. It is not for use on dry pavement. The following conditions will affect the electronic locking differential: • The electronic locking differential will not engage if your vehicle speed is above 20 mph (32 km/h) in 4x2, 4x4 Auto, or 4x4 High modes The electronic locking differential will not engage if your vehicle speed is above or 56 mph (90 km/h) in 4X4 Low The electronic locking differential will not engage if you press your accelerator pedal beyond 50% during an engagement attempt In 4x2, 4x4 Auto, and 4x4 High modes, the electronic locking differential 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 electronic locking differential 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 electronic locking differential and disable it during driving maneuvers when necessary When you switch the system on, if you do not meet the required conditions for electronic locking differential activation, the instrument cluster will display the appropriate information guiding you through the proper activation process. Activating the Electronic Locking Differential (If Equipped) Note: Do not use electronic locking differential on dry, hard surfaced roads. Doing so will produce excessive noise, vibration and increase tire wear. Note: If the electronic locking differential has difficulty disengaging, release the accelerator pedal and turn the steering wheel in the opposite direction while rolling. • 159 F150 (TF6)