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344 SERVICING AND MAINTENANCE
Tire Rotation Recommendations
The tires on the front and rear of your vehicle
operate at different loads and perform different
steering, handling, and braking functions. For
these reasons, they wear at unequal rates.
These effects can be reduced by timely rotation
of
tires. The benefits of rotation are especially
worthwhile with aggressive tread designs such as
those on On/Off Road type tires. Rotation will
increase tread life, help to maintain mud, snow,
and wet traction levels, and contribute to a
smooth, quiet ride.
Refer to the “Maintenance Plan” in “Servicing
And
Maintenance” for the proper maintenance
intervals. The reasons for any rapid or unusual
wear should be corrected prior to rotation being
performed.
The suggested rotation method is the “rearward
cro
ss” shown in the following diagram.
Tire Rotation (Rearward Cross)
DEPARTMENT OF TRANSPORTATION
UNIFORM TIRE QUALITY GRADES
The following tire grading categories were
established by the National Highway Traffic
Safety Administration. The specific grade rating
assigned by the tire's manufacturer in each
category is shown on the sidewall of the tires on
your vehicle.
All passenger vehicle tires must conform to
Fed
eral safety requirements in addition to
these grades.
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
graded 150 would wear one and one-half times
as well on the government course as a tire
graded 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.
CAUTION!
Proper operation of four-wheel drive vehicles
depends on tires of equal size, type, and
circumference on each wheel. Any difference
in tire size can cause damage to the transfer
case. Tire rotation schedule should be
followed to balance tire wear.
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