0A-10 GENERAL INFORMATION
PRECAUTION IN SERVICING FULL-TIME 4WD
VEHICLE
This full-time 4WD vehicle can not be converted to 2WD man-
ually.
Observe the following caution in servicing. Otherwise, front
wheels drive rear wheels or vise-versa and vehicle acci-
dents, drivetrain damage and personal injury may result.
Never perform any of the following types of service
work.
[A] : Testing with 2-wheel chassis dynamometer, speed-
ometer tester or brake tester.
[B] : Driving front wheels, which are jacked up.
[C] : Towing under the condition where either front or
rear wheels can not rotate.
When testing with 2-wheel chassis dynamometer,
speedometer tester or brake tester, be sure to make the
vehicle as front wheel drive by removing propeller shaft.
When using On-vehicle type wheel balancing equipment
(1), be sure to jack up all four wheels, off the ground
completely and support vehicle with safety stands (2).
Be careful of the other wheels, which will rotate at the
same time.
This vehicle should be towed under one of the following
conditions :
– With all wheels on a flatbed truck.
– With front or rear wheels lifted and a dolly under the
other wheels.
3-6 STEERING, SUSPENSION, WHEELS AND TIRES
RADIAL TIRE WADDLE
Waddle is side to side movement at the front and/or rear of the
vehicle. It is caused by the steel belt not being straight within the
tire. It is most noticeable at a low speed, 8 to 48 kph (5 to 30
mph).
It is possible to locate the faulty tire by road testing the vehicle. If
it is on the rear, the rear end of the vehicle shakes from side to
side or “waddles”. To the driver in the seat, it feels as though
someone is pushing on the side of vehicle.
If the faulty tire is on the front, waddling is more visual. The front
sheet metal appears to be moving back and forth and the driver
feels as though he is at the pivot point in vehicle.
Waddle can be quickly diagnosed by using Tire Problem Detector
(TPD) and following the equipment manufacture’s recommenda-
tions.
If TPD is not available, an alternative method of substituting
known-good tire/wheel assemblies can be used as follows,
although it takes a longer time.
1) Ride vehicle to determine whether the front or rear waddles.
2) Install tires and wheels that are known to be good (on similar vehicle) in place of those on waddling end of
vehicle. If waddling end cannot be identified, substitute rear ones.
3) Road test again. If improvement is noted, reinstall originals one at a time till waddle causal tire is found. If no
improvement is noted, install known-good tires in place of all four. Then reinstall originals in the same man-
ner as above.
EQUIPMENT MANUFACTURE’S RECOMMENDATIONS
In flate tires to recommended pressure
Road test vehicle on level unrowned road in both directions
Switch front tires side to side and road test again
Lead corrected,
if roughness results, replace tiresLeads in same directionLeads reverses direction
Put tires back in original position
and check alignmentInstall a known-good tire on one front side
Lead remains install a known-good
tire in place of other front tire
Lead remains known-good tires are not goodLead corrected replace tire
Lead corrected replace tire
