Ford 2003 F-550 v.5 Manuel d'utilisateur télécharger pdf (Page 129)

FOUR-WHEEL DRIVE (4WD) OPERATION (IF EQUIPPED)

For important information regarding safe operation of this type

of vehicle, see Preparing to drive your vehicle in this chapter.

When four–wheel drive (4WD) is engaged, power is supplied to all four

wheels through a transfer case. 4WD can be selected when additional

driving power is desired.

4WD operation is not recommended on dry pavement. Doing so could

result in difficult disengagement of the transfer case, increased tire wear

and decreased fuel economy.

Manual 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 the arrow and the

indicator dot on the hub are

aligned, and that both hub

locks are set to the same

position (both set to LOCK or both set to FREE).

Electronic shift on the fly (ESOF) 4x4 system (if equipped)

If equipped with the Electronic Shift 4WD System, and 4WD Low

is selected while the vehicle is moving, the 4WD system will not

engage. This is normal and should be no reason for concern.

Before 4WD Low can be engaged, the vehicle must be brought to

a complete stop, the brake pedal depressed and the transmission

placed in N (Neutral ) (on automatic transmissions or the clutch

pedal depressed on manual transmissions).

The 4WD system:

• provides 4x4 High engagement and disengagement while the vehicle is

moving.

2003 F250/350/450/550 (f23)

Owners Guide (post-2002-fmt)

USA English (fus)

Driving

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Ford 2003 F-550 v.5 Manuel d'utilisateur Page 129