
ENGINE DATA
Engine 5.4L V8 engine 6.8L V10 engine
Cubic inches 330 415
Required fuel 87 octane 87 octane
Firing order 1-3-7-2-6-5-4-8 1-6-5-10-2-7-3-8-4-9
Spark plug gap1.02–1.28mm
(0.040–0.050 inch)*1.02–1.28mm
(0.040–0.050 inch)*
Ignition system Coil on plug Coil on plug
Compression ratio 9.8:1 9.2:1
*The 5.4L 3V and 6.8L 3V spark plug gap CANNOT be adjusted.
Drivebelt routing
5.4L V8/6.8L V10 engines
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
356

1. World manufacturer identifier
2. Brake type and gross vehicle
weight rating (GVWR)
3. Vehicle line, series, body type
4. Engine type
5. Check digit
6. Model year
7. Assembly plant
8. Production sequence number
TRANSMISSION/TRANSAXLE CODE DESIGNATIONS
You can find a transmission/transaxle code on the vehicle Safety
Compliance Certification Label. The following table tells you which
transmission or transaxle each code represents.
Code Description
5 Six-speed manual, Dana (ZF S6–650)
7 Six-speed manual, Dana (ZF M6HD-W)
T Five-speed automatic, TorqShift (gas engines)
B Five-speed automatic, TorqShift (diesel engine)
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
358

GENUINE FORD ACCESSORIES FOR YOUR VEHICLE
A wide selection of Genuine Ford Accessories are available for your
vehicle through your local authorized Ford or Ford of Canada authorized
dealer. These quality accessories have been specifically engineered to
fulfill your automotive needs; they are custom designed to complement
the style and aerodynamic appearance of your vehicle. In addition, each
accessory is made from high quality materials and meets or exceeds
Ford’s rigorous engineering and safety specifications. Ford Motor
Company will repair or replace any properly authorized dealer-installed
Genuine Ford Accessory found to be defective in factory-supplied
materials or workmanship during the warranty period, as well as any
component damaged by the defective accessory. The accessory will be
warranted for whichever provides you the greatest benefit:
•12 months or 12,000 miles (20,000 km) (whichever occurs first), or
•the remainder of your new vehicle limited warranty.
Contact your authorized dealer for details and a copy of the warranty.
The following is a list of several Genuine Ford Accessories available for
your vehicle. Not all accessories are available for all models. For a
complete listing of the accessories that are available for your vehicle,
please contact your authorized dealer or visit our online store at:
www.fordaccessoriesstore.com.
Exterior style
Bug shields
Chrome exhaust tips
Deflectors
Running boards
Splash guards
Step bars
Tonneau covers
Wheels
Interior style
Electrochromatic compass/temperature interior mirrors
Floor mats
Lifestyle
Ash cup / smoker’s package
Bedliners and bedmats
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Accessories
359

A
Accessory delay ..........................99
Air cleaner filter ...............348–350
Air conditioning ..........................75
Airbag supplemental restraint
system ................................171–172
and child safety seats ............173
description ..............................172
disposal ....................................175
driver airbag ............................174
indicator light .........................175
operation .................................174
passenger airbag .....................174
passenger deactivation
switch ......................................176
Ambulance packages ....................8
Antifreeze
(see Engine coolant) ................324
Anti-lock brake system
(see Brakes) ..............................235
Anti-theft system ......................148
arming the system ..................149
Audio system
(see Radio) ......................22, 24, 30
Automatic transmission ............240
driving an automatic
overdrive .................................241
fluid, adding ............................343
fluid, checking ........................343
fluid, refill capacities ..............352
Auxiliary Input Jack ...................36
Auxiliary power point .................96
Axle
refill capacities ........................352
traction lok ..............................239
B
Battery .......................................322acid, treating emergencies .....322
jumping a disabled battery ....290
maintenance-free ....................322
replacement, specifications ...350
servicing ..................................322
Belt-Minder.............................167
Brakes ........................................235
anti-lock ...................................235
anti-lock brake system (ABS)
warning light ...........................235
fluid, checking and adding ....342
fluid, refill capacities ..............352
parking ....................................236
shift interlock ..........................240
trailer .......................................223
Break-in period .............................5
Bulbs ............................................85
C
Capacities for refilling fluids ....352
Cassette tape player ...................22
Cell phone use ..............................7
Child safety restraints ..............181
child safety belts ....................181
Child safety seats ......................184
attaching with tether straps ..188
in front seat ............................185
in rear seat ..............................185
Cleaning your vehicle
engine compartment ..............307
instrument panel ....................309
interior .....................................310
plastic parts ............................309
safety belts ..............................310
washing ....................................306
waxing .....................................306
wheels ......................................307
wiper blades ............................309
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Index
361

Climate control (see Air
conditioning or Heating) ............75
Clock adjust
6-CD in dash .............................31
AM/FM/CD .................................25
Clutch
fluid ..........................................342
operation while driving ..........244
recommended shift speeds ....244
Compass, electronic
set zone adjustment
...............127
Console
......................................116
overhead
....................................96
Controls
power seat
...............................154
steering column
......................107
Coolant
checking and adding
..............324
refill capacities
................327, 352
Cruise control
(see Speed control)
..................104
Customer Assistance
................265
Ford accessories for your
vehicle
.....................................313
Ford Extended Service
Plan
..........................................302
Getting assistance outside the
U.S. and Canada
.....................303
Getting roadside assistance
...265
Getting the service you
need
.........................................298
Ordering additional owner’s
literature
.................................304
Utilizing the
Mediation/Arbitration
Program
...................................302D
Daytime running lamps
(see Lamps) ................................81
Dipstick
automatic transmission
fluid ..........................................343
engine oil .................................319
Driveline universal joint and
slip yoke ....................................348
Driving under special
conditions ..................243, 256, 259
sand .........................................258
snow and ice ...........................260
through water .................258, 262
DVD system .................................43
E
Electronic message
center .................................116, 122
Emergencies, roadside
jump-starting ..........................290
Emergency Flashers .................267
Emission control system ..........338
Engine ........................................356
cleaning ...................................307
coolant .....................................324
diesel ...........................................8
fail-safe cooling .......................328
idle speed control ...................322
refill capacities ........................352
service points ..................316–317
starting after a collision .........267
Engine block heater .................234
Engine oil ..................................319
checking and adding ..............319
dipstick ....................................319
filter, specifications ........321, 350
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Index
362

lighting up panel and
interior .......................................82
J
Jump-starting your vehicle ......290
K
Keyless entry system ...............146
autolock ...................................136
programming entry code .......146
Keys ...........................................149
positions of the ignition .........231
L
Lamps
autolamp system .......................80
daytime running light ...............81
fog lamps ...................................80
headlamps .................................80
headlamps, flash to pass ..........81
instrument panel, dimming .....82
interior lamps ...........................85
replacing bulbs ....... 85–86, 88–93
Lane change indicator
(see Turn signal) ........................85
Lights, warning and indicator ....12
anti-lock brakes (ABS) ..........235
Load limits .................................212
Loading instructions .................218
Locks
autolock ...................................136
childproof ................................140
Lug nuts ....................................289
Lumbar support, seats .............155
M
Manual transmission .................244fluid capacities ........................352
reverse .....................................245
Message center .................116, 122
english/metric button .............126
system check button ..............125
warning messages ...........119, 128
Mirrors ...................................96, 99
fold away .................100, 102–103
heated ......................................100
side view mirrors (power) .....100
signal .......................................103
Moon roof ..................................110
Motorcraft parts ................330, 350
N
Navigation system .......................43
O
Octane rating ............................334
Oil (see Engine oil) ..................319
Overdrive .....................................95
P
Parking brake ............................236
Parts (see Motorcraft parts) ....350
Pedals (see Power adjustable
foot pedals) ...............................104
Power adjustable foot pedals ...104
Power distribution box
(see Fuses) ...............................273
Power door locks ......................136
Power mirrors ...........................100
Power point .................................96
Power steering ..........................238
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Index
364