Ford 2015 F-550 v.1 Manuel d'utilisateur télécharger pdf (Page 157)

Using the Electronic Shift on the

Fly 4WD system (If Equipped)

E163190

2H (2WD)

For general on-road driving. Sends power

to the rear wheels only and should be used

for street and highway driving. Provides

optimal smoothness and fuel economy at

high speeds.

4H (4X4 HIGH)

Used for extra traction such as in snow or

icy roads or in off road situations. This

mode is not intended for use on dry

pavement.

4L (4X4 LOW)

Uses extra gearing to provide maximum

power to all four wheels at reduced

speeds. Intended only for off-road

applications such as deep sand, steep

grades, or pulling heavy objects. 4L (4x4

low) will not engage while the vehicle is

moving above 3 mph (5 km/h); this is

normal and should be no reason for

concern. Refer to Shifting to/from 4L (4x4

low) for proper operation.

Shifting between system modes

Note: Momentarily releasing the accelerator

pedal while performing a shift will improve

engagement/disengagement times.

Note: Do not perform this operation if the

rear wheels are slipping.

Note: Some noise may be heard as the

system shifts or engages; this is normal.

Note: 4X4 high mode is not intended for

use on dry pavement.

You can move the control from 2H or 4H

at a stop or while driving. The information

display may display a message indicating

a 4X4 shift is in progress. Once the shift is

complete the message center will then

display the system mode selected.

If SHIFT DELAYED PULL FORWARD is

displayed in the information display during

the mode shift, transfer case gear tooth

blockage is present. To alleviate this

condition, place the transmission in a

forward gear and move the vehicle forward

approximately 5 feet (1.5 meters) to allow

the transfer case to complete the mode

shift.

Shifting to/from 4L (4X4 low)

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.

1. Bring the vehicle to a speed of 3 mph

(5 km/h) or less.

2. Place the transmission in N (Neutral).

3. Move the 4WD control to the desired

position.

The information display will display a

message indicating a 4X4 shift is in

progress. The information display will then

display the system mode selected. If any

of the above shift conditions are not met,

the shift will not occur and the information

display will display information guiding the

driver through the proper shifting

procedures.

154

Super Duty (), enUSA

Four-Wheel Drive (If Equipped)

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