Ford EXPEDITION 2017 Owner's Manual page 450

Axle and Transfer Case Maintenance
Axle(s) and transfer case (four-wheel drive
vehicles) 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) or three months, whichever
comes first, if the rear axle is filled with
non-synthetic fluid. This interval can be
waived and the 150,000 mi (240,000km)
service interval can continue if the rear axle
is filled with 75W85 synthetic gear fluid
meeting Ford specification
WSS-M2C942-A, part number
XY-75W85-QL, or equivalent. Add friction
modifier XL-3 (EST-M2C118-A) or
equivalent for complete refill of
Traction-Lok rear axles.
Expedition (TB7) Canada/United States of America, enUSA, Edition date: 201604, Third Printing
Scheduled Maintenance
447
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 (4,800 km).
If the available API SM or SN oils are not
available, then the oil change interval is
1,800 mi (2,900 km).
Engine Air Filter Replacement
The life of the engine 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.