2021 FORD F-350 service interval

Off-road operation
Inspect the wheels and related components for abnormal
noise, wear, looseness or drag.
Rotate tires, inspect tires for wear and measure the tread
depth. 1
Replace front wheel bearing grease and grease seals if
you use non-sealed bearings.
Every 30,000 mi
(48,000 km)
1 Rotate the front wheels on vehicles with dual rear wheels when specified. Only rotate
the rear wheels if you notice unusual wear. Exclusive use of E85 - Flex Fuel Vehicles Only
If ran exclusively on E85, fill the fuel tank full with regular
unleaded fuel.
Every oil change interval
Diesel Engine
If you operate your vehicle primarily in any
of the following conditions, you need to
perform extra maintenance as indicated.
If you operate your vehicle occasionally
under any of these conditions, it is not
necessary to perform the extra
maintenance. For specific
recommendations, see your dealership
service advisor or technician. Towing a Trailer or Using a Car-top Carrier
Change the engine oil and filter as indicated by the
information display, and perform the services listed in the
scheduled maintenance chart.
As required
See the axle maintenance items under
Exceptions.
Replace the engine-mounted and frame-mounted fuel
filters.
Every
15,000 mi
(24,000 km) or six months,
600 engine hours
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Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance

Exceptions
Axle and Transfer Case Maintenance
Axle(s) and transfer case, 4X4 only, fluid
changes or level checks are not required
unless a leak is suspected or the assembly
has been submerged in water. During long
periods of trailer towing with outside
temperatures above 70°F (21°C) or at
wide-open throttle for long periods above
45 mph (72 km/h)
, change the rear axle
fluid every 30,000 mi (48,000 km) if the
rear axle is filled with non-synthetic fluid.
This interval can be waived and the
150,000 mi (240,000 km) service interval
can continue if the rear axle is filled with
75W140 synthetic gear fluid meeting Ford
specification WSL-M2C192-A, part number
XY-75W140-QL, or equivalent. Add friction
modifier XL-3 (EST-M2C118-A) or
equivalent for complete refill of
Traction-Lok rear axles. See
Capacities
and Specifications (page 441).
Additional Axle Maintenance for Dual
Rear Wheels
Change the rear axle fluid every
250,000 mi (400,000 km)
under normal
driving conditions on all commercial
applications. When you operate your
vehicle at or near maximum gross vehicle
weights, change the rear axle fluid every
60,000 mi (96,000 km)
. In addition,
follow this 60,000 mi (96,000 km)
schedule when you operate your vehicle
under the special operating conditions
where noted. California Fuel Filter Replacement
If you register your vehicle in California, the
California Air Resources Board has
determined that the failure to perform this
maintenance item does not nullify the
emission warranty or limit recall liability
before the completion of your vehicle's
useful life. Ford Motor Company, however,
urges you to have all recommended
maintenance services performed at the
specified intervals and to record all vehicle
service.
Hot Climate Oil Change Intervals
Vehicles operating in the Middle East,
North Africa, Sub-Saharan Africa or
locations with similar climates using an
American Petroleum Institute (API)
Certified for Gasoline Engines (Certification
mark) oil of SM or SN quality, the normal
oil change interval is 3,000 mi (5,000 km).
If the available API SM or SN oils are not
available, then the oil change interval is
2,000 mi (3,000 km)
.
Engine Air Filter and Cabin Air Filter
Replacement
The life of the engine air filter and cabin air
filter is dependent on exposure to dusty
and dirty conditions. Vehicles operated in
these conditions require frequent
inspection and replacement of the engine
air filter and cabin air filter.
Diesel Particulate Filter
Over time, a slight amount of ash builds
up in the diesel particulate filter, which is
not removed during the regeneration
process. The filter may need to be replaced
with a new or remanufactured part at
approximately 250,000 mi (400,000 km).
Actual mileage varies depending on engine
and vehicle operating conditions.
582
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Scheduled Maintenance

Audio Unit.......................................................479
Accessing the Apps Menu............................. 480
Accessing the Clock Settings....................... 480
Accessing the Media Source Menu............480
Accessing the Phone Features.................... 480
Accessing the Settings Menu....................... 480
Accessing the Sound Settings..................... 480
Adjusting the Volume...................................... 480
Changing Radio Stations............................... 480
Listening to the Radio....................................... 481
Playing or Pausing Media................................ 481
Selecting the Audio Modes........................... 489
Setting a Memory Preset............................... 489
Switching Radio Text On and Off.................481
Switching Repeat Mode On and Off...........481
Switching Shuffle Mode On and Off...........481
Switching the Audio Unit On and Off.........481
Switching the Display On and Off...............481
Using Seek, Fast Forward and Reverse.............................................................. 481
Using the Display Control................................ 481
Using the Number Block.................................. 481
Autolamps........................................................88 Windshield Wiper Activated
Headlamps........................................................ 88
Automatic High Beam Control..................93
Automatic High Beam Control Indicators........................................................93
Automatic Transmission...........................207
Brake-Shift Interlock......................................... 210
If Your Vehicle Gets Stuck in Mud or Snow.................................................................... 211
Neutral Idle with F350, F450, F550 and F600 Chassis Cab Vehicles....................... 210
Understanding the Shift Positions of Your Automatic Transmission............................ 207
Understanding Your SelectShift Automatic ™ Transmission....................... 208
Automatic Transmission Fluid Capacity and Specification - Diesel.....................463
Automatic Transmission Fluid Capacity and Specification - Gasoline
................463
Six-Speed Automatic Transmission..........463
Ten-Speed Automatic Transmission.........464
Automatic Transmission Fluid Check.............................................................376
Auto Mode
.......................................................145
Auto Mode Indicators........................................ 145Switching Auto Mode On and Off................145
Switching Dual Mode On and Off................146
Autowipers.......................................................85
Auxiliary Power Points...............................168 400 Watt AC Power Point.............................. 168
DC Power Point................................................... 168
Locations............................................................... 169
Auxiliary Switches
.......................................559
Upfitter Interface Module............................... 562
B
Battery See: Changing the 12V Battery...................... 379
Bed Extender....................................................73 Grocery mode........................................................ 75
Tailgate mode........................................................ 74
Blind Spot Information System
.............254
Blind Spot Information System with Trailer
Tow..................................................................... 256
Switching the System Off and On..............258
System Errors...................................................... 258
Using the System............................................... 255
BLIS See: Blind Spot Information System..........254
Bonnet Lock See: Opening and Closing the Hood..........348
Booster Seats..................................................33 Types of Booster Seats...................................... 34
Brake Fluid Check.........................................377 Brake Fluid Service Interval............................ 378
Brake Fluid Specification..........................465
Brakes...............................................................223 General Information.......................................... 223
Breaking-In.....................................................320
Bulb Specification Chart...........................447
C
Calculating Payload
....................................274
Calculating the Load Limit.......................274
Helpful examples for calculating the
available amount of cargo and luggage
load capacity.................................................. 275
Canceling the Set Speed...........................231
Capacities and Specifications
.................441
Cargo Lamps....................................................91
648
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 202008, Third-Printing- Index