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Home >> Ford >> 2002 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2940 (Four Wheel Drive (4WD) Systems -- F250-F550 Super Duty) >> Description And Operation >> Four Wheel Drive (4WD) Systems >> Electronic Locking Differential (ELD) System

Electronic Locking Differential (ELD) System

WARNING: This page is about a different car, the 2011 Ford Pickup, 2011 Ford F550 Super Duty, 2011 Ford F450 Super Duty, and 2011 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The Electronic Locking Differential (ELD) system consists of the following components:

The optional ELD  system allows the operator to lock the rear differential side gears on slippery and/or off road surfaces. ELD  operation is requested by pulling out (4WD  electronic shift vehicles) or turning the MSS  to the on position (4WD  mechanical shift and 2WD  vehicles).

The operator can engage the ELD  per the charts below:

ELD ENGAGEMENT SPEEDS - 4WD VEHICLES

Switch Position Engage Disengage Re-engage
2H 30 km/h (19 mph)(1) 40 km/h (25 mph) 30 km/h (19 mph)(1)
4H 30 km/h (19 mph)(1) 40 km/h (25 mph) 30 km/h (19 mph)(1)
4L 90 km/h (56 mph)(1) 100 km/h (62 mph) 90 km/h (56 mph)(1)
(1) The ELD  system engages/re-engages at or below the speed noted.
ELD ENGAGEMENT SPEEDS - 2WD VEHICLES

Switch Position Engage Disengage Re-engage
Off N/A N/A N/A
On 30 km/h (19 mph)(1) 40 km/h (25 mph) 30 km/h (19 mph)(1)
(1) The ELD  system engages/re-engages at or below the speed noted.