2021 FORD F-350 suspension

In addition to providing an excellent
on-road driving experience, your vehicle
excels at all types of off-road driving. Your
vehicle has been designed and equipped
to allow you to explore those places where
the road doesn
’t take you, whether it’ s a
forest trail or the open desert. Before going
off-roading, consult with your local
governmental agencies to determine
designated off-road trails and recreation
areas. Also, be sure to understand any
off-road vehicle registration requirements
for the area in which you plan on driving.
Tread Lightly® is an educational program
designed to increase public awareness of
land-use regulations and responsibilities
in our nation ’s wilderness areas. Ford joins
the U.S. Forest Service and Bureau of Land
Management in encouraging you to help
preserve our national forest and other
public and private lands by treading lightly.
Before taking your vehicle off-roading, a
basic vehicle inspection should be
conducted to make sure that the vehicle
is in peak operating condition.
It is always recommended that at least
two vehicles are used while off-roading.
The buddy system helps make sure that
help is close at hand should a vehicle
become stuck or damaged. It is also wise
to take supplies such as a first aid kit,
drinking water, tow strap, cell or satellite
phone with you any time an off-road
excursion is planned.
Remove the front license plate before
off-roading to achieve optimal
performance. Basic Off-road Driving Techniques
•
Grip the steering wheel with thumbs
on the outside of the rim. This reduces
the risk of injury due to abrupt steering
wheel motions that occur when
negotiating rough terrain. Do not grip
the steering wheel with thumbs inside
the rim.
• Throttle, brake and steering inputs
should be made in a smooth and
controlled manner. Sudden inputs to
the controls can cause loss of traction
or upset the vehicle, especially while
on sloped terrain or while crossing
obstacles such as rocks or logs.
• Look ahead on your route noting
upcoming obstacles, changes to
surface texture, color changes and any
other factors which may indicate a
change in available traction. Adjusting
the vehicle speed and route
accordingly. During pre-run, mark
obstacles with GPS markers to make
sure appropriate speeds are used to
avoid potential vehicle damage.
• When driving off-road, if the front or
rear suspension is bottoming-out
and/or excessive contact with the
skid-plates is encountered, reduce
vehicle speed to avoid potential
damage to the vehicle.
• When running with other vehicles, it is
recommended that some form of radio
communication is used so the lead
vehicle can notify others of obstacles
that could cause damage.
• Always keep available ground
clearance in mind and pick a route that
minimizes the risk of catching the
underside of the vehicle on an obstacle.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Driving Hints

Wheel misalignment in the front
or the rear can cause uneven and
rapid treadwear of your tires and
should be corrected by an
authorized dealer. Front-wheel
drive vehicles and those with an
independent rear suspension may
require alignment of all four
wheels.
The tires should also be balanced
periodically. An unbalanced tire
and wheel assembly may result in
irregular tire wear.
Tire Rotation
WARNING: If the tire label
shows different tire pressures for
the front and rear tires and the
vehicle has a tire pressure
monitoring system, then you
need to update the settings for
the system sensors. Always
perform the system reset
procedure after tire rotation. If
you do not reset the system, it
may not provide a low tire
pressure warning when
necessary.
Note: If your tires show uneven
wear ask an authorized dealer to
check for and correct any wheel
misalignment, tire imbalance or
mechanical problem involved
before tire rotation. Note:
Your vehicle may be
equipped with a dissimilar spare
wheel and tire assembly. A
dissimilar spare wheel and tire
assembly is defined as a spare
wheel and tire assembly that is
different in brand, size or
appearance from the road tires and
wheels. If you have a dissimilar
spare wheel and tire assembly it is
intended for temporary use only
and should not be used in a tire
rotation.
Note: After having your tires
rotated, inflation pressure must be
checked and adjusted to the
vehicle requirements.
Rotating your tires at the
recommended interval (as
indicated in the Scheduled
Maintenance chapter) will help
your tires wear more evenly,
providing better tire performance
and longer tire life. Sometime
irregular tire wear can be
corrected by rotating the tires. Rear-wheel drive vehicles and
four-wheel drive vehicles (front
tires at left of diagram).
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Wheels and TiresE142548

non-recommended tires and wheels can
cause steering, suspension, axle, transfer
case or power transfer unit failure.
Follow the Ford recommended tire
inflation pressure found on the Safety
Compliance Certification Label (on the
door hinge pillar, door latch post or the
door edge that meets the door latch
post, next to the driver seat), or Tire
Label on the B-Pillar or the edge of the
driver door. Failure to follow the tire
pressure recommendations can cause
uneven treadwear patterns and
adversely affect the way your vehicle
handles.
WARNING: Do not use snow chains
on snow-free roads.
Note: Do not use snow chains on vehicles
with LT275/65R20 or LT 285/75R18 sized
tires.
The tires on your vehicle have all-weather
treads to provide traction in rain and snow.
However, in some climates, you may need
to use snow tires and cables. If you need
to use cables, we recommend that you use
steel wheels of the same size and
specification, as cables may chip
aluminum wheels.
Note: The suspension insulation and
bumpers will help prevent vehicle damage.
Do not remove these components from your
vehicle when using snow tires and chains.
Follow these guidelines when using snow
tires and chains:
• If possible, avoid fully loading your
vehicle.
• Use only SAE Class S chains.
• Install chains securely, verifying that
the chains do not touch any wiring,
brake lines or fuel lines.
• Only install snow chains on the rear
axle. •
For Dual Rear Wheel (DRW) vehicles,
only install snow chains on the outer
wheel of each pair.
• Drive cautiously. If you hear the chains
rub or bang against your vehicle, stop
and retighten the chains. If this does
not work, remove the chains to prevent
damage to your vehicle.
• Remove the tire chains when you no
longer need them. Do not use tire
chains on dry roads.
If you have any questions regarding snow
chains or cables, please contact your
authorized dealer.
TIRE PRESSURE MONITORING
SYSTEM
Vehicle Tire Pressure Monitoring
System WARNING:
The tire pressure
monitoring system is not a substitute for
manually checking tire pressures. You
should periodically check tire pressures
using a pressure gauge. Failure to
correctly maintain tire pressures could
increase the risk of tire failure, loss of
control, vehicle rollover and personal
injury. Check each tire, including the
spare, if provided, monthly when
cold and inflated to the inflation
pressure recommended by the vehicle
manufacturer on the vehicle placard or tire
inflation pressure label. If your vehicle has
tires of a different size than the size
indicated on the vehicle placard or tire
inflation pressure label, you should
determine the proper tire inflation pressure
for those tires.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Wheels and Tires

Note:
This receiver includes the eCos
real-time operating system. eCos is
published under the eCos License.
Satellite Radio Reception Factors Potential satellite radio reception issues
For optimal reception performance, keep the antenna
clear of snow and ice build-up and keep luggage and other
material as far away from the antenna as possible.
Antenna obstructions
Hills, mountains, tall buildings, bridges, tunnels, freeway
overpasses, parking garages, dense tree foliage and
thunderstorms can interfere with your reception.
Terrain
When you pass a ground-based broadcast-repeating
tower, a stronger signal may overtake a weaker one and
the audio system may mute.
Station overload
Your display may show ACQUIRING . . . to indicate the
interference and the audio system may mute.
Satellite radio signal interfer-
ence
SiriusXM Satellite Radio Service
Note: SiriusXM reserves the unrestricted
right to change, rearrange, add or delete
programming including canceling, moving
or adding particular channels, and its prices,
at any time, with or without notice to you.
Neither SiriusXM and its affiliates nor Ford
Motor Company and its affiliates will be
liable to you or any third party for any such
modification, suspension or termination. SiriusXM satellite radio is a
subscription-based satellite radio service
that broadcasts a variety of music, sports,
news, weather, traffic and entertainment
programming. Your factory-installed
SiriusXM satellite radio system includes
hardware and a limited subscription term,
which begins on the date of sale or lease
of your vehicle. See an authorized dealer
for availability.
For more information on extended
subscription terms (a service fee is
required), the online media player and a
complete list of SiriusXM satellite radio
channels, and other features, please visit
www.siriusxm.com in the United States,
www.siriusxm.ca in Canada, or call
SiriusXM at 1-888-539-7474.
Satellite Radio Electronic Serial
Number (ESN)
You need your ESN to activate, modify or
track your satellite radio account.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Audio System - Vehicles With: SYNCE208625

Note:
This receiver includes the eCos
real-time operating system. eCos is
published under the eCos License.
Satellite Radio Reception Factors Potential satellite radio reception issues
For optimal reception performance, keep the antenna
clear of snow and ice build-up and keep luggage and other
material as far away from the antenna as possible.
Antenna obstructions
Hills, mountains, tall buildings, bridges, tunnels, freeway
overpasses, parking garages, dense tree foliage and
thunderstorms can interfere with your reception.
Terrain
When you pass a ground-based broadcast-repeating
tower, a stronger signal may overtake a weaker one and
the audio system may mute.
Station overload
Your display may show ACQUIRING . . . to indicate the
interference and the audio system may mute.
Satellite radio signal interfer-
ence
SiriusXM Satellite Radio Service
Note: SiriusXM reserves the unrestricted
right to change, rearrange, add or delete
programming including canceling, moving
or adding particular channels, and its prices,
at any time, with or without notice to you.
Neither SiriusXM and its affiliates nor Ford
Motor Company and its affiliates will be
liable to you or any third party for any such
modification, suspension or termination. SiriusXM satellite radio is a
subscription-based satellite radio service
that broadcasts a variety of music, sports,
news, weather, traffic and entertainment
programming. Your factory-installed
SiriusXM satellite radio system includes
hardware and a limited subscription term,
which begins on the date of sale or lease
of your vehicle. See an authorized dealer
for availability.
For more information on extended
subscription terms (a service fee is
required), the online media player and a
complete list of SiriusXM satellite radio
channels, and other features, please visit
www.siriusxm.com in the United States,
www.siriusxm.ca in Canada, or call
SiriusXM at 1-888-539-7474.
Satellite Radio Electronic Serial
Number (ESN)
You need your ESN to activate, modify or
track your satellite radio account.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Audio System - Vehicles With: SYNC 3E208625

Multi-Point Inspection
In order to keep your vehicle running right,
it is important to have the systems on your
vehicle checked regularly. This can help
identify potential issues and prevent major
problems. We recommend having the
following multi-point inspection performed
at every scheduled maintenance interval
to help make sure your vehicle keeps
running great.Multi-Point Inspection
Hazard warning system operation
Accessory drive belt or belts
Horn operation
Battery performance
Radiator, cooler, heater and air conditioninghoses
Engine air filter
Suspension components for leaks ordamage
Exhaust system
Steering and linkage
Exterior lamps operation
Tires including the spare for wear andproper pressure 2
Fluid levels 1
; fill if necessary
Windshield for cracks, chips or pits
For oil and fluid leaks
Washer spray and wiper operation
Half-shaft dust boots
1 Brake, coolant recovery reservoir, automatic transmission and window washer
2 If your vehicle is equipped with a temporary mobility kit, check the tire sealant expiration
Use By date on the canister. Replace as needed.
Be sure to ask your dealership service
advisor or technician about the multi-point
vehicle inspection. It is a comprehensive
way to perform a thorough inspection of
your vehicle. Your checklist gives you
immediate feedback on the overall
condition of your vehicle. NORMAL SCHEDULED
MAINTENANCE
Intelligent Oil-Life Monitor
Your vehicle has an Intelligent Oil-Life
Monitor that determines when you should
change the engine oil based on how you
use your vehicle. By using several
important factors in its calculations, the
monitor helps reduce the cost of owning
your vehicle and reduces environmental
waste at the same time.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance

Gasoline Engine
Normal Maintenance Intervals
10,000 mi (16,000 km) / 450 Engine Hours or 12 Months - Whichever Comes First
Change the engine oil and filter. 1
Rotate the tires, inspect tire wear and measure the tread depth. 2
Inspect the wheels and related components for abnormal noise, wear, looseness or
drag.
Perform multi-point inspection - recommended.
Inspect the brake pads, shoes, rotors, drums, brake linings, hoses and the parking brake.
Inspect the engine coolant concentration, freeze-point protection, level and the hoses.
Inspect the exhaust system and heat shields.
Inspect the front axle and U-joints. If applicable, lubricate the grease fittings. Four-wheel
drive vehicles.
Inspect the steering linkage, ball joints, suspension, tie-rod ends, driveshaft and the U-
joints. If applicable, lubricate the grease fittings.
1 Reset the Intelligent Oil-Life Monitor after engine oil and filter changes.
2 Rotate the front wheels on vehicles with dual rear wheels when specified. Only rotate
the rear wheels if you notice unusual wear. Brake Fluid Maintenance
1
Change the brake fluid. 2
Every three years
1 Perform this maintenance item every three years. Do not exceed the designated time
for the interval.
2 Brake fluid servicing requires special equipment available at your authorized dealer.
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance

At Every Oil Change Interval as Indicated by the Information Display
1
Inspect the front axle and U-joints. Lubricate any grease fittings. Four-wheel drive
vehicles.
Inspect the steering linkage, ball joints, suspension, tie-rod ends, driveshaft and the U-
joints. Lubricate any grease fittings.
1 Do not exceed one year/10,000 mi (16,000 km) or 350 engine hours between service
intervals.
2 Reset the Intelligent Oil-Life Monitor after engine oil and filter changes.
3 Reset the engine air filter information monitor after you replace the air filter.
4 Rotate the front wheels on vehicles with dual rear wheels when specified. Only rotate
the rear wheels if you notice unusual wear. Brake Fluid Maintenance
1
Change the brake fluid. 2
Every three years
1 Perform this maintenance item every three years. Do not exceed the designated time
for the interval.
2 Brake fluid servicing requires special equipment available at your authorized dealer. Other Maintenance items
1
Replace the cabin air filter.
Every
20,000 mi
(32,000 km)
Replace the engine air filter. 2
Every
30,000 mi
(48,000 km) Replace the engine-mounted and frame-mounted fuel filters.
Inspect the engine and secondary cooling system coolant
concentration freeze-point protection, additive corrosion
inhibitor strength, coolant level, and hoses. Add coolant
additive if necessary.
Replace the engine air inlet foam filter.
Every
50,000 mi
(80,000 km)
Replace the front wheel bearing grease and grease seal if
using non-sealed bearings. Two-wheel drive vehicles.
Every
60,000 mi
(96,000 km)
Inspect the accessory drive belt or belts. 3
At
90,000 mi
(144,000 km)
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance