1998 FORD EXPEDITION tires

1. Pull the wiper arm away from
the windshield and lock into the
service position.
2. Turn the blade at an angle from
the wiper arm. Push the lock pin
with a screwdriver to release the
blade and pull the wiper blade
down toward the windshield to
remove it from the arm.
3. Attach the new wiper to the
wiper arm and press it into place
until a click is heard.
INFORMATION ABOUT TIRE
QUALITY GRADES
New vehicles are fitted with tires
that have their Tire Quality Grade
(described below) molded into the
tire's sidewall. These Tire Quality
Grades are determined by
standards that the United States
Department of Transportation has
set.
Tire Quality Grades apply to new
pneumatic tires for use on
passenger cars. They do not apply
to deep tread, winter-type snow
tires, space-saver or temporary use
spare tires, tires with nominal rim
diameters of 10 to 12 inches or
limited production tires as defined
in Title 49 Code of Federal
Regulations Part 575.104(c)(2).
Maintenance and care
172

U.S. Department of
Transportation-Tire quality
grades:The U.S. Department of
Transportation requires Ford to
give you the following information
about tire grades exactly as the
government has written it.
Treadwear
The treadwear grade is a
comparative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test course.
For example, a tire grade 150
would wear one and one-half
(1 1/2) times as well on the
government course as a tire grade
100. The relative performance of
tires depends upon the actual
conditions of their use, however,
and may depart significantly from
the norm due to variations in
driving habits, service practices,
and differences in road
characteristics and climate.
Traction A B C
The traction grades, from highest
to lowest are A, B, and C, and they
represent the tire's ability to stop
on wet pavement as measured
under test surfaces of asphalt and
concrete. A tire marked C may
have poor traction performance.
The traction grade
assigned to this tire is
based on braking (straight
ahead) traction tests and does
not include cornering (turning)
traction.
Maintenance and care
173

Temperature A B C
The temperature grades are A (the
highest), B, and C, representing
the tire's resistance to the
generation of heat and its ability to
dissipate heat when tested under
controlled conditions on a
specified indoor laboratory test
wheel. Sustained high temperature
can cause the material of the tire
to degenerate and reduce tire life,
and excessive temperature can
lead to sudden tire failure. The
grade C corresponds to a level of
performance which all passenger
car tires must meet under the
Federal Motor Vehicle Safety
Standard No. 109. Grades B and A
represent higher levels of
performance on the laboratory test
wheel than the minimum required
by law.
The temperature grade for
this tire is established for a
tire that is properly inflated and
not overloaded. Excessive speed,
underinflation, or excessive
loading, either separately or in
combination, can cause heat
buildup and possible tire failure.
SERVICING YOUR TIRES
Checking the tire pressure
²Use an accurate tire pressure
gauge.
²Check the tire pressure when
tires are cold, after the vehicle
Maintenance and care
174

has been parked for at least one
hour or has been driven less
than 5 km (3 miles).
²Adjust tire pressure to
recommended specifications
found on the Safety Compliance
Certification Label.
Improperly inflated tires
can affect vehicle handling
and can fail suddenly, possibly
resulting in loss of vehicle
control.
Tire rotation
Because your vehicle's tires
perform different jobs, they often
wear differently. To make sure
your tires wear evenly and last
longer, rotate them as indicated in
the ªService Guide.º If you notice
that the tires wear unevenly, have
them checked.
²Four tire rotation
Maintenance and care
175

Replacing the tires
Replace the tires when the wear
band is visible through the tire
treads.
Failure to follow these
precautions may adversely
affect the handling of the vehicle
and make it easier to lose control
and roll over.
Tires that are larger or smaller
than your vehicle's original tires
may also affect the accuracy of
your speedometer.
SNOW TIRES AND CHAINS
Snow tires must be the
same size and grade as the
tires you currently have on your
vehicle.
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 chains.
Follow these guidelines when using
snow tires and chains:
²Use only cable type chains
offered by Ford as an accessory
Maintenance and care
176

or equivalent. SAE class ªSº or
other conventional link type
chains may contact and cause
damage to the vehicle's wheel
house and/or body.
²Install chains securely, verifying
that the chains do not touch any
wiring, brake lines or fuel lines.
²Drive cautiously. If you hear the
chains rub or bang against your
vehicle, stop and re-tighten the
chains. If this does not work,
remove the chains to prevent
damage to your vehicle.
²If possible, avoid fully loading
your vehicle.
²Remove the tire chains when
they are no longer needed. Do
not use tire chains on dry roads.
²The suspension insulation and
bumpers will help prevent
vehicle damage. Do not remove
these components from your
vehicle when using snow tires
and chains.
²Do not exceed 48 km/h (30
mph) with tire chains on your
vehicle.
WHAT YOU SHOULD KNOW
ABOUT AUTOMOTIVE FUELS
Important safety precautions
Do not overfill the fuel
tank. The pressure in an
overfilled tank may cause
leakage and lead to fuel spray
and fire.
Maintenance and care
177

Relays .................................128,136
Remote entry system .................55
illuminated entry ......................58
locking/unlocking doors ......55,56
replacement/additional
transmitters ...............................58
replacing the batteries .............57
Reporting safety defects ..........207
Safety restraints
automatic locking mode
(retractor) .......................72,73,74
extension assembly ..................76
for children ...............................83
lap and shoulder belts ........71,72
maintenance ..............................77
proper use .................................70
warning light and chime 12,76,77
Safety seats for children
attaching with tether straps ....90
automatic locking mode
(retractor) .................................87
tether anchorage hardware .....90
Seats ............................................60
adjusting the seat, manual .......60
adjusting the seat, power ........61
lumbar support .........................60
rear flip fold seat .................63,64
rear seat access ........................63
reclining the seat ......................65
third row seat ............65,66,67,68
Servicing your vehicle ..............150
precautions when servicing ...150
Side mirrors .................................51
Snowplowing .................................3
Special notice
utility-type vehicles ....................3
Specification chart, lubricants .202
Speed control ..............................33
canceling a set speed ...............36
resuming a set speed ...............37
tap up/tap down .......................35
turning off .................................33Speed sensitive steering ..........101
Speedometer ...............................14
Starting your vehicle ........92,93,95
Steering, power .........................101
Storage compartments
overhead storage
compartment .............................40
Tachometer
mechanical cluster ...................15
Tilt steering wheel ......................37
Tires ....................................172,174
checking the pressure ............174
replacing ..................................176
rotating ....................................175
snow tires and chains ............176
treadwear ................................173
Traction-lok rear axle ........103,167
Trailer towing
calculating maximum trailer
weight ......................................119
tips ...........................................124
Transmission .............................164
automatic
operation ............104,105,106,107
fluid, checking and adding
(automatic) .............................164
Trip odometer .............................15
Turn signal
lever ...........................................32
Vehicle dimensions ...................204
Vehicle Identification Number
(VIN) ..........................................206
Vehicle loading ..........................115
Ventilating your vehicle .............97
Warning chimes .............................6
Washer fluid
rear window reservoir ............158
warning light .............................12
Windows
accessory delay .........................48
power windows, operating ..45,47
Index
210