Ford F-550 (2017 year). Manual — part 50

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Air in the fuel system, due to loose
connections.

•

An open or pinched sensor hose.

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Check engine oil level.

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Wrong fuel or oil viscosity for the
climatic conditions.

If these checks do not help you correct the
engine performance problem you are
experiencing, have your vehicle checked
as soon as possible.

Noise Emissions Warranty, Prohibited
Tampering Acts and Maintenance

On January 1, 1978, Federal regulation
became effective governing the noise
emission on vehicles weighing over
10,000 lb (4,536 kg) Gross Vehicle Weight
Rating. The preceding statements
concerning prohibited tampering acts and
maintenance, and the noise warranty
found in the Warranty Guide, are
applicable to complete chassis cabs over
10,000 lb (4,536 kg) Gross Vehicle Weight
Rating.

AUTOMATIC TRANSMISSION

WARNING

Always apply the parking brake fully
and make sure you shift into park (P).
Switch the ignition off and remove

the key whenever you leave your vehicle.

Understanding the Shift Positions
of Your Automatic Transmission

(If Equipped)

E163183

Putting your vehicle in or out of gear:

1.

Fully press down the brake pedal.

2. Move the gearshift lever into the

desired gear.

3. Come to a complete stop.

4. Move the gearshift lever and securely

latch it in park (P).

Park (P)

This position locks the transmission and
prevents the rear wheels from turning.

Reverse (R)

With the gearshift lever in reverse (R), your
vehicle will move backward. Always come
to a complete stop before shifting into and
out of reverse (R).

Neutral (N)

With the gearshift lever in neutral (N), your
vehicle can be started and is free to roll.
Hold the brake pedal down while in this
position.

Drive (D)

Drive (D) is the normal driving position for
the best fuel economy. The drive function
allows automatic upshifts and downshifts
through gears one through six.

M (Manual)

With the gearshift lever in manual (M), the
driver can change gears up or down as
desired. By moving the gearshift lever from
drive position drive (D) to manual (M) you
now have control of selecting the gear you
desire using buttons on the shift lever. See
Understanding your SelectShift
Automatic™ transmission later in this
section.

To return to normal drive (D) position,
move the shift lever back from manual (M)
to drive (D).

The transmission operates in gears one
through six.

Second (2)

Transmission operates in second (2) gear
only. Use second (2) gear to start-up on
slippery roads.

First (1)

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Transmission operates in first (1) gear
only.

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Provides maximum engine braking.

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Allows upshifts by moving gearshift
lever.

•

Will not downshift into first (1) gear at
high speeds; allows for first (1) gear
when vehicle reaches slower speeds.

Forced downshifts

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Allowed in drive (D) with the tow/haul
feature on or off.

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Press the accelerator to the floor.

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Allows transmission to select an
appropriate gear.

Tow/Haul Mode

WARNING

Do not use the tow/haul feature
when driving in icy or slippery
conditions as the increased engine

braking can cause the rear wheels to slide
and your vehicle to swing around with the
possible loss of vehicle control.

E161509

To activate tow/haul, press the
button on the gearshift lever
once. The TOW HAUL indicator

light illuminates in the instrument cluster.

The tow/haul feature:
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Delays upshifts to reduce the frequency
of transmission shifting.

•

Provides engine braking in all forward
gears, which slows your vehicle and
assists you in controlling your vehicle
when descending a grade.

•

Depending on driving conditions and
load conditions, may downshift the
transmission, slow your vehicle and
control your vehicle speed when
descending a hill, without pressing the
accelerator pedal. The amount of
downshift braking provided will vary
based upon the amount you press the
brake pedal.

The tow/haul feature improves
transmission operation when towing a
trailer or a heavy load. All transmission
gear ranges are available when using
tow/haul.

Note: If your vehicle is equipped with the
Adaptive Steering System, enabling the
tow/haul feature will adjust the steering
response. In tow/haul mode the Adaptive
Steering system reduces vehicle sensitivity
to steering inputs at higher vehicle speeds
while maintaining the ease of parking and
maneuverability at low speeds. See
Steering (page 256).

To deactivate the tow/haul feature and
return to normal driving mode, press the
button on the gearshift lever when
tow/haul is active. The TOW HAUL light
deactivates. Tow/haul also deactivates
when you power down your vehicle.

Understanding your SelectShift
Automatic™ transmission

(If Equipped)

E163184

Your vehicle is equipped with a SelectShift
Automatic™ transmission gearshift lever.
The SelectShift Automatic transmission
gives you the ability to change gears up or
down (without a clutch) as desired.

In order to prevent the engine from running
at too low an RPM, which may cause it to
stall, SelectShift will still automatically
make some downshifts if it has determined
that you have not downshifted in time.
Although SelectShift will make some
downshifts for you, it will still allow you to
downshift at any time as long as the
SelectShift determines that damage will
not be caused to the engine from
over-revving.

SelectShift will not automatically upshift,
even if the engine is approaching the RPM
limit. It must be shifted manually by
pressing the + button.

Note: Engine damage may occur if you
maintain excessive engine revving without
shifting.

The SelectShift Automatic transmission
feature has two modes: PRS and M mode.

PRS (Progressive Range Selection)

Progressive Range Selection gives you the
ability to lockout gears from the automatic
shifting range. This may provide you with
an improved driving experience (for
example, in slippery conditions or when
experiencing a steep grade).

With the gearshift lever in drive (D), press
the – button to active PRS. The available
and selected gears are indicated on the
instrument cluster.

All available gears will display with the
current gear indicated. Press the – button
again to lock out gears beginning with the
highest gear. Example: press the – button
twice to lock out 6th and 5th gears. Only
the available gears will display and the
transmission will automatically shift
between the available gears. Press the +
button to unlock gears to allow the
transmission to shift to higher gears. The
transmission will shift automatically within
the gear range you select.

Manual (M)

Moving the gearshift lever to the manual
(M) position will allow you to manually
select the gear you desire. Only the current
gear will display. Use the buttons on the
gearshift lever to manually select gears.
Press the + button to upshift or the –
button to downshift. Return the
transmission to a different gearshift
position to deactivate manual control.

Recommended shift speeds

Upshift according to the following chart:

Upshifts when accelerating (recommended for best fuel economy)

Diesel engines

Gasoline engines

Shift from:

12 mph (19 km/h)

15 mph (24 km/h)

1 – 2

19 mph (31 km/h)

25 mph (40 km/h)

2 – 3

26 mph (42 km/h)

40 mph (64 km/h)

3 – 4

34 mph (55 km/h)

45 mph (72 km/h)

4 – 5

46 mph (74 km/h)

50 mph (80 km/h)

5 – 6