Page 363 of 554
Dual Rear Wheels
The tires used on dual wheel assemblies should be
matched for wear to prevent overloading one tire in a set.
To check if tires are even, lay a straight edge across all
four tires. The straight edge should touch all the tires.
CAUTION!
3500 Dual Rear Tires have only one approved direc-
tion of rotation. This is to accommodate the asym-
metrical design (tread pattern) of the ON/OFF road
tire and the use of Outline White Letter (OWL) tires.
²When replacing a flat, the spare tire may have to
be remounted on the rim, or installed at a different
location, to maintain the correct placement of the
tire on the wheel relative to the tire/wheel position
on the truck. For example, if the spare is used to
replace an outer rear tire it will have to be re-
mounted on the rim so that the wheel is dished
inward. That way the tread design of asymmetrical
tires and the white writing of the OWL tires will
maintain proper position.
STARTING AND OPERATING 361
5
Page 417 of 554
WHAT TO DO IN EMERGENCIES
CONTENTS
mHazard Warning Flasher..................416
mJacking And Tire Changing................417
NJack Location........................417
NReinstalling The Scissors-Type Jack And Tools
(1500 Models)........................419
mJacking Instructions.....................422
NRemoving The Spare Tire................422
NTire Changing Procedure................423mHoisting.............................434
mJump-Starting Procedures.................434
mFreeing A Stuck Vehicle..................437
mEmergency Tow Hooks Ð If Equipped........438
mTowing A Disabled Vehicle................439
N4-Wheel Drive Vehicles.................439
N2±Wheel Drive Vehicles.................439
6
Page 433 of 554

8-Stud Ð Dual Rear Wheels
Dual wheels are flat-mounted and center-piloted. The lug
nuts are a two-piece assembly. When the tires are being
rotated or replaced, clean these lug nuts and add two
drops of oil at the interface between the hex and the
washer.Slots in the wheels will assist in properly orienting the
inner and outer wheels. Align these slots when assem-
bling the wheels for best access to the tire valve on the
inner wheel. The tires of both dual wheels must be
completely off the ground when tightening, to ensure
wheel centering and maximum wheel clamping.
Dual wheel models require a special heavy-duty lug nut
tightening adapter (included with the vehicle) to cor-
rectly tighten the lug nuts. Also, when it is necessary to
remove and install dual rear wheels, use a proper vehicle
lifting device.
NOTE:When installing a spare tire as part of a dual rear
wheel end combination, the tire diameter of the two
individual tires must be compared. If there is a significant
difference, the larger tire should be installed in a front
location. Correct direction of rotation for dual tire instal-
lations must also be observed.
WHAT TO DO IN EMERGENCIES 431
6