wheel CHEVROLET TRACKER 1993 Owner's Manual

the tires against the road surface makes
it possible for the vehicle to change its
path when you turn the front wheels. If
there’s no traction, inertia will keep the
vehicle going in the same direction. If
you’ve ever tried to steer a vehicle on
wet ice, you’ll understand this.
The traction you can get
in a curve
depends on the condition of your tires
and the road surface, the angle at which
the curve is banked, and your speed.
While you’re
in a curve, speed is the
one factor you can control.
Suppose you’re steering through a sharp
curve. Then you suddenly apply the
brakes. Both control systems
- steering
i and braking - have to do their work where the tires
meet the road. Adding
the hard braking can demand too much
at those places.
You can lose control.
The same thing can happen if you’re
steering through a sharp curve and you
suddenly accelerate. Those two control
systems
- steering and acceleration -
can overwhelm those places where the
tires meet the road and make you lose
control.
What should you do if this ever
happens? Let up
on the brake or
accelerator pedal, steer the vehicle the
way you want it to go, and slow down.
Speed limit signs near curves warn that
you should adjust your speed.
Of
course, the posted speeds are based on
good weather and road conditions.
Under less favorable conditions you’ll
want to go slower.
If you need to reduce your speed as you
approach a curve, do it before you enter
the curve, while your front wheels are
straight ahead.
Try to adjust your speed
so you can
“drive” through the curve. Maintain a
reasonable, steady speed. Wait to
accelerate until you are out of the curve,
and then accelerate gently into the
straightaway.
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Your Driving and the Road
When you drive into a curve at night,
it’s harder to see the road ahead of you
because it bends away from the straight
beams of your lights. This is one good
reason to drive slower.
134
Steering in Emergencies
There are times when steering can be
more effective than braking. For
example, you come over a hill and
find
a truck stopped in your lane, or a car
suddenly pulls out from nowhere, or a
child darts out from between parked cars
and stops right in front of you.
You can
avoid these problems by braking
- if
you can stop in time. But sometimes you
can’t; there isn’t room. That’s the time
for evasive action
- steering around the
problem.
Your Geo can perform very well in
emergencies like these. First apply your brakes,
but not enough to lock your
front wheels. It is better to remove as
much speed as you can from a possible
collision. Then steer around the
problem, to the left or right depending
on the space available.
An emergency like this requires close
attention and a quick decision.
If you
are holding the steering wheel at the
recommended
9 and 3 o’clock positions,
you can turn it a full
180 degrees very
quickly without removing either hand.
But
you have to act fast, steer quickly,
and just as quickly straighten the wheel
once you have avoided the object.
You
must then be prepared to steer back to
your original lane and then brake to a
controlled stop.
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Depending on your speed, this can be
rather violent for an unprepared driver.
This is one of the reasons driving
experts recommend that you use your
safety belts and keep both hands on the
steering wheel.
The fact that such emergency situations are always possible is a good reason to
practice defensive driving at all times. Off-Road Recovery
You may find sometime that your right
wheels have dropped off the edge of a
road onto the shoulder
(A) while you’re
driving.
If the level of the shoulder is only
slightly below the pavement, recovery
should be fairly easy. Ease
off the
accelerator and then, if there is nothing
in the way, steer
so that your vehicle
straddles the edge of the pavement. You
can turn the steering wheel up to
1/4
turn (B) until the right front tire contacts
the pavement edge. Then turn your
steering wheel to go straight down the
roadway.
If the shoulder appears to be about four
inches
(100 mm) or more below the
pavement,
this difference can cause
problems. If there is not enough room to
pull entirely onto the shoulder and stop,
then follow the same procedures. But
if
the right front tire scrubs against the
side of the pavement, do NOT steer
more sharply. With too much steering
angle, the vehicle may jump back onto
the road with
so much steering input
that it crosses over into the oncoming
traffic before you can bring it back
under control. Instead, ease
off again on
the accelerator and steering input,
straddle the pavement once more, then
try again.
I
136-
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Your Driving and the Road
you just passed may seem to be
further away from
you than it really
is.)
Try not to pass more than one vehicle
at a time on two-lane roads.
Reconsider before passing the next
vehicle.
vehicle too rapidly. Even though the
brake lights are not flashing, it may
be slowing down or starting to turn.
If you’re being passed, make it easy
for the following driver to get ahead
of you. Perhaps you can ease a little
to the right.
Don’t overtake a slowly moving
Loss of Control
Let’s review what driving experts say
about what happens when the three
control systems (brakes, steering and
acceleration) don’t have enough friction
where the tires meet
the road to do what
the driver has asked.
In any emergency, don’t give up. Keep
trying to steer and constantly seek an
escape route or area of less danger.
Skidding
In a skid, a driver can lose control of
the vehicle. Defensive drivers avoid
most skids by taking reasonable care
suited to existing conditions, and by not
“overdriving” those conditions. But
skids are always possible. The three types
of skids correspond
to
your Geo’s three control systems. In the
braking skid your wheels aren’t rolling.
In the steering or cornering skid,
too
much speed or steering in a curve causes
tires to slip and lose cornering force.
And in the acceleration skid too much
throttle causes the driving wheels to
spin.
A cornering skid and an acceleration
skid are best handled by easing your
foot off the accelerator pedal. If your
vehicle starts to slide (as when you turn
a corner on a wet, snow- or ice-covered
road), ease your foot off the accelerator
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pedal as soon as you feel the vehicle
start to slide. Quickly steer the way you
want the vehicle to go. If you start
steering quickly enough, your vehicle
will straighten out. As
it does, straighten
the front wheels.
Of course, traction is reduced when
water, snow, ice, gravel, or other
material is
on the road. For safety,
you’ll want to slow down and adjust
your driving to these conditions. It is
important to slow down
on slippery
surfaces because stopping distance
will
be longer and vehicle control more
limited. While
driving on a surface with reduced
traction,
try your best to avoid sudden
steering, acceleration, or braking
(including engine braking by shifting to
a lower gear). Any sudden changes
could cause the tires to slide.
You may
not realize the surface
is slippery until
your vehicle is skidding. Learn to
recognize warning clues
- such as
enough water, ice
or packed snow on
the. road to make a “mirrored surface’’
- and slow down when you have any
doubt. Remember: the
rear wheel anti-lock
braking system (RWAL) helps avoid
only a rear braking skid. In a braking
skid (where the front wheels are no
longer rolling), release enough pressure
on the brakes to get the front wheels
rolling again. This restores steering
control. Push the brake pedal down
steadily when you have to stop
suddenly. As long as the front wheels
are rolling, you will have steering
control. Steer the way you want to go.
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Your Driving and the Road
Driving Guidelines
... 140
This multipurpose passenger vehicle is
defined as a utility vehicle in Consumer
Information Regulations issued by the
National Highway Traffic Safety
Administration (NHTSA) of the United
States Department of Transportation.
Utility vehicles have higher ground
clearance and a narrower track to make
them capable of performing in a wide
variety of off-road applications. Specific
design characteristics give them a higher
center of gravity than ordinary cars. An
advantage
of the higher ground
clearance
is a better view of the road
allowing you to anticipate problems. They
are not designed for cornering at
the same speeds as conventional
two-wheel drive vehicles any more than
low-slung sports cars are designed to
perform satisfactorily under off-road
conditions. If at all possible, avoid sharp
turns or abrupt maneuvers. As with
other vehicles of this type, failure to
operate this vehicle correctly may result
in
loss of control or vehicle rollover.
1 Off-Road Driving with
Your Geo Four-Wheel-
Drive Vehicle
This off-road guide is for vehicles that
have four-wheel drive.
Also, see “Anti-Lock Brakes” in the
Index.
If your vehicle doesn’t have four-wheel
drive, you shouldn’t drive off-road
unless you’re on a level, solid surface.
Off-road driving can be great
fun. But it
does have some definite hazards. The
greatest of these is the terrain itself.
“Off-roading” means you’ve left the
great North American road system
behind. Traffic lanes aren’t marked.
Curves aren’t banked. There are no road
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signs. Surfaces can be slippery, rough,
uphill or downhill. In short, you’ve
gone right back to nature.
Off-road driving involves some new
skills. And that’s why
it’s very
important that you read this guide.
You’ll find many driving tips and
suggestions. These will help make your
off-road driving safer and more
enjoyable.
Before You Go Off-Roading
There are some things to do before you
go out. For example, be sure to have all
necessary maintenance and service work
done. Be sure
to read all the information
about your four-wheel drive vehicle in
this manual.
Is there enough fuel? Is the spare
tire fully inflated? Are the fluid
levels up where they should be? What
are the local laws that apply to
off-roading where you’ll be driving? If
you don’t
know, you should check with
law enforcement people in the area. Wil
you be on someone’s private land?
If so
be sure to get the necessary permission.
Loading Your Vehicle for Off-Road
Driving
There are some important things to
remember about how to load your
vehicle.
The heaviest things should be on the
load floor and forward of your rear
axle. Put heavier items as far forward
as you can.
Be sure the load is secured properly,
so driving on the off-road terrain
doesn’t
toss things around.
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Your Driving and the Road
... 144
Scanning the Terrain
Off-road driving can take you over
many different kinds of terrain. You
need to be familiar with the terrain and
its many different features. Here
are
some things to consider.
Surface Conditions. Off-roading can
take you over hard-packed dirt; gravel,
rocks, grass, sand, mud, snow or ice.
Each
of these surfaces affects the
steering, acceleration, and braking of
your vehicle in different ways.
Depending upon the kind of surface you
are
on, you may experience slipping,
sliding,
wheel spinning, delayed
acceleration, poor traction. and longer
braking distanc
Surface Obstacles. Unseen or hidden
obstacles can be hazardous.
A rock, log,
hole, rut, or bump can startle
you if
you’re not prepared for them. Often
these obstacles
are hidden by grass,
bushes, snow or even the rise and fall of
the terrain itself. Here are some things
to consider:
Is the path ahead clear?
Will the surface texture change
Does the travel take you uphill or
abruptly up ahead?
downhill? (There’s
more discussion of
these subjects later.)
change direction quickly?
Will you have to stop suddenly or When you
drive over obstacles or rough
terrain, keep
a firm grip on the steering
wheel. Ruts, troughs, or other surface
features can jerk the wheel out of your
hands if you’re not prepared.
When you drive over bumps, rocks, or
other obstacles,
your wheels can leave
the ground.
If this happens, even with
one or two wheels, you can’t control the
vehicle as well or at
all.
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Is the hill simply too rough? Steep
hills often have ruts, gullies, troughs
and exposed rocks because they are
more susceptible to
the effects of
erosion.
Driving Uphill
Once you decide you can safely drive up
the hill, you need to take some special
steps.
Use a low gear and get a firm grip on
the steering wheel.
Get a smooth start up the hill and try
to maintain your speed. Don’t use
more power than you need, because
you don’t want your wheels to start
spinning or sliding.
Try to drive straight up the hill if at
all possible. If the path twists and
turns, you might want to find another
route.
CAUTION
A
Turning or driving across
steep hills can be dangerous.
You could lose traction, slide
sideways, and possibly roll over.
You could be seriously injured or
killed. When driving
up hills,
always
try to go straight up.
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If your engine has stopped running,
you’ll need to restart
it. With the
brake pedal depressed and the
parking brake still applied, shift the
transmission
to P (Park) (or, shift to
Neutral if your vehicle has a
manual transmission) and restart the
engine. Then, shift to reverse,
release the parking brake, and
slowly back down the hill in
reverse.
As you are backing down the hill,
put your
left hand on the steering
wheel at the
12 o’clock position.
This way, you’ll be able
to tell if
your wheels are straight or turned to
the left or right as you back down. Here
are some things you
must not do
if you stall, or are about to stall, when
going up
a hill.
Never attempt to prevent a stall by
shifting into
N (Neutral) (or
depressing the clutch, if you have a
manual transmission)
to “rev-up” the
engine and regain forward
momentum. This won’t work. Your
vehicle will roll backwards very
quickly and you could go out of
control.
Instead, apply the regular brake to stop
the vehicle. Then apply the parking
brake. Shift into reverse, release the
parking brake, and slowly back down.
Never attempt to turn around if you
are about to stall when going up a
hill.
If the hill is steep enough to
stall your vehicle, it’s steep enough
to cause you to roll over if you turn
around. If you can’t make it up the
hill, you must back down the hill.
Q: Suppose, after stalling, I try to
back down the hill and decide
I
just can’t do it. What should I do?
A: Set the parking brake, put your
transmission
in P (Park) (or the
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