2008 SAAB 9-3 wheel torque

175 Starting and driving
Traction Control
System (TCS)Anti-spin systemHow the system worksThe Traction Control System (TCS) is
designed to prevent wheelspin. This
enables the car to achieve the best possible
grip and, hence, maximum tractive effort,
together with greater stability.The TCS uses information from the ABS
wheel sensors to detect when the front (driv-
ing) wheels are rotating faster then the rear
wheels.
If the two front wheels are rotating faster
than the rear wheels, the torque from the
engine is reduced to eliminate the differ-
ence.
The process continues until all the wheels
are rotating at the same speed.
The advantages of the TCS become most
apparent when the cohesion between the
front wheels and the road surface is so low
that one or both of the wheels would lose
their grip were the car not equipped with the
TCS, e.g.:
When the car is pulling away or accelerat-
ing with the front wheels on different
surfaces (e.g. one slippery and one dry),
the TCS functions like an electronic differ-
ential lock, making sure that both wheels
rotate at the same speed. The system
also functions when the car is reversing.
When cornering, if the inside front wheel
rotates faster than the other wheels.
TCS OFF
lights up if:
the system has been switched off
manually. It cannot be switched off if the
car is travelling faster than 35 mph
(60 km/h).
there is a fault in the ABS system
a fault has been detected and the system
has therefore been switched off and at the
same time the following message is
shown on the SID:
WARNING
When driving normally, the TCS system
helps to improve the car’s stability,
maneuverability and traction under slip-
pery road and extreme driving conditions.
The TCS must not be regarded as a
system to enable the driver to maintain
higher speeds. The same precautions
must be adopted as normal for safe cor-
nering and driving on slippery roads.
Traction control failure.
Contact service.
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191 Starting and driving
Recommendations for cars with
automatic transmissionThe following driving time limits are based
on the capacity of the cooling system in hot
weather, i.e. approximately 86°F (+30°C).
The following driving time limits are based
on the capacity of the cooling system in hot
weather, i.e. approximately 104°F (+40°C).When negotiating long hills, bear the follow-
ing important considerations in mind.
Rises in coolant temperature are indicated
by the temperature gauge in the main instru-
ment panel.
The following steps are taken in order as the
temperature of the transmission increases:
Gear change pattern is altered
A/C compressor is switched off
Max. engine torque is reduced
The following message will be displayed on
the SID if the transmission fluid becomes
too hot:
If this message appears, stop the car as
soon as it is safe to do so and allow the
engine to idle until the message has gone
out. The selector lever should be in
position P.
NOTEOnly use a towbar that has been
approved for your car. We recom-
mend that you entrust towbar installa-
tion to an authorized Saab dealer,
which can also provide important
information such as trailer weight.
Your authorized Saab dealer has
information on how the towbar is to be
installed and whether other measures
must be undertaken that could affect
the cooling system or other equipment
We recommend that you contact a
Saab dealer for guidance on how to
connect a trailer hitch.
Exercise care when driving on uneven
roads or against the curb if the car is
heavily laden. This particularly applies
to cars with 17" wheels.
Gradient of
hill, %Max. trailer
weight, lbs.
(kg)Time limit,
minutes
6-8 3330 (1500) unlimited
9-11 3080 (1400) max 15
12-14 2645 (1200) max 15
max 15 2200 (1000) max 15
Gradient of
hill, %Max. trailer
weight, lbs.
(kg)Time limit,
minutes
6-8 2200 (1000) unlimited
9-11 1760 (800) max 15
12-14 1100 (500) max 15
max 15 880 (400) max 15
Gearbox too hot. Make a
safe stop. Open hood.
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192 Starting and drivingWhen continuing your journey, manually
select a low gear in which the engine speed
is about 3,500 rpm until the incline eases
(see page 170).
Recommendations for cars with
manual transmissionRises in coolant temperature are indicated
by the temperature gauge in the main instru-
ment panel.
When the needle is just outside the red
zone, the A/C compressor will be switched
off and, on certain engine variants, the max-
imum engine torque will be limited.
When continuing your journey, select a low
gear in which the engine speed is about
3,500 rpm until the incline eases.
Trailer hitch loadThe weight distribution on the trailer makes
a lot of difference to the handling properties
of the car and trailer combination. With a
two-wheel trailer, concentrate the load over
the wheels and keep it as low as possible.
The trailer should be loaded so that the load
on the towball is 110–165 lbs. (50–75 kg).
Note that this load must be included in the
total load for the car. If this now exceeds the
specified load capacity, the load in the trunk
may have to be reduced by the correspond-
ing amount.
WARNING
Remember to use engine-braking (selec-
tor position M1, M2, or M3) to spare the
brakes when you are driving on a long or
steep downhill slope.
Overheating can cause the brakes to
fade!
WARNING
Remember to use engine-braking (selec-
tor position 1, 2, or 3) to spare the brakes
when you are driving on a long or steep
downhill slope.
Overheating can cause the brakes to
fade!
Distribution of load in trailer
aLight
b Moderate
c Heavy
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263 Car care
When the car has to be lifted, the jack must
be positioned at one of the four jacking
points (front or rear) under the sill members.
If a floor jack is used, the lifting plate must
be positioned under the normal jacking
points, see illustration. If the car is equipped
with a towbar, the jack can also be placed
under this. To be even more certain the vehicle won't
move, you should put blocks at the front
and rear of the tire farthest away from the
one being changed. That would be the
tire, on the other side, at the opposite end
of the vehicle.
The car jack is designed solely for use
in changing a tire or fitting snow
chains. It must not be used to sup-
port the car during repair work or
servicing.
Never crawl under a car that is sup-
ported only by a jack. Always use axle
stands.
Raising your vehicle too high or with
the jack improperly positioned can
damage the vehicle and even make
the vehicle fall. To help avoid personal
injury and vehicle damage, be sure to
fit the jack lift head into the proper
location before raising the vehicle, and
raise the vehicle only far enough off
the ground so there is enough room for
the spare tire to fit (no more than
25 mm or 1 inch clearance between
the ground and the bottom of the tire).
Switch on the hazard warning lights if
the car is on a road.
The jack should be stored correctly
under the carpeting in the trunk. If it
lies loose in the car, it could thrown for-
ward and cause personal injury in the
event of a crash or if the car rolls over.
Grit, salt and rust can clog the inner
threads of the wheel bolts if the car has
been driven for several years exclu-
sively with alloy wheels.
If steel wheels are being installed, the
bolt hole threads in the brake hubs
should be cleaned before the thinner
steel wheels are fitted. It may other-
wise not be possible to achieve the
correct clamping force, despite tight-
ening the wheel bolts to the correct
torque.
NOTEApply the jack only to the jacking points
indicated on the body.Jacking points for floor jack
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265 Car care
4 Clean any rust or dirt from the contact
surfaces between the wheel and brake
disc. Do not wipe away the grease in the
wheel hub.
5 Add a thin layer of grease on the bolts
before fitting, see page 266. Fit the
wheel and screw in the bolts in the
sequence shown on page 266 (opposite
pairs).
Tighten the bolts enough for the bolts
and wheel to be seated correctly.
6 Lower the car and tighten the wheel
bolts to torque in sequence as shown on
page 266.
Tightening torque
Light-alloy wheels: 80 ft.lb. (110 Nm).
Steel wheels: 80 ft.lb. (110 Nm).
Lubricate the heads of the wheel studs
with a small amount of Vaseline or simi-
lar and refit the plastic covers on the
wheel studs. The Vaseline makes it
easier to remove them later on.7 Retouching the wheel bolts after twenty
or so miles.
Tightening torque
Light-alloy wheels: 80 ft.lb. (110 Nm).
Steel wheels: 80 ft.lb. (110 Nm).
We advise against using wheels with large
ventilation slots in winter, as the brake com-
ponents are then more exposed to slush,
road salt and grit.
If you fit wheels of a different dimension, the
speedometer can be reprogrammed to
ensure it is as accurate as possible. We rec-
ommend that you contact a Saab dealer.
Driving with tire chains3
33 3, see page 188NOTEDo not overtighten the bolts using a
impact wrench: not only can this
damage the wheels but it can also
make it impossible to undo the bolts
using the wheel wrench in the car’s
toolkit.
When refitting a wheel cover, make
sure that the valve protrudes through
the marked recess in the wheel cover.
Do not wipe away the grease in the wheel
hub.
Clean any rust or dirt from the contact sur-
faces between the wheel and brake disc.
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307 Index
Signalling, horn
_________________ 120
Ski hatch, SportCombi
___________ 145
Ski hatch, SportSedan ___________ 140
Spare wheel
___________________ 260
Speed ratings, tires
______________ 253
Speedometer
___________________ 87
Sport mode, automatic transmission

167
Starting the engine
______________ 154
Steering wheel adjustment
________ 120
Steering wheel lock
______________ 154
Steps for determining correct load
limit
_________________________ 256
Storage compartments
___________ 136
Sun visor
______________________ 134
Switches _______________________ 97
TTCS
__________________________ 175
Technical data
_________________ 286
Textile carpeting, cleaning
________ 267
Tie down eyes, SportCombi _______ 146
Tie down eyes, SportSedan _______ 141
Tightening torque, wheels
_________ 265
Tire chains
____________________ 251
Tire date code __________________ 257
Tire inspection and rotation
_______ 245
Tire markings
__________________ 253
Tire sidewall labeling
____________ 252
Tire sizes
_____________________ 296
Tire terminology and definitions
____ 254
Tire, changing
__________________ 262Tire, spare
_____________________ 260
Tires
_________________________ 244
Tools and spare wheel
___________ 260
Touching up paintwork ___________ 270
Towbar
_______________________ 190
Towbar load
___________________ 192
Towing
_______________________ 197
Towing a trailer
_________________ 190
Towing the car _________________ 198
Traction Control System (TCS)
_____ 175
Transmission oil, checking
________ 212
Transmission oil, grade
___________ 293
Transmission, automatic __________ 165
Transmission, manual
____________ 164
Transporting the car
_____________ 199
Treadwear indicators ____________ 247
Trip computer
___________________ 90
Trip meter
______________________ 90
Troubleshooting, A/C and ACC
_____ 274
Trunk lid, driving when open
_______ 196
Trunk lid, opening
________________ 51
Turbo gauge
____________________ 88
UUniform tire quality grading
________ 248
Upholstery care
_________________ 266
Upholstery, cleaning
_____________ 266
Useful tips on night driving
________ 197
Useful tips on starting
____________ 155
VVanity mirror
___________________ 134
Vehicle Data Collection
___________ 284
Vehicle identification number
______ 299
Vehicle recovery
________________ 199
WWarning labels
____________________ 8
Warning lights ___________________ 82
Warning triangle ________________ 102
Warnings and messages on SID,
Convertible
____________________ 71
Washer fluid ___________________ 221
Washer jets
____________________ 222
Washers
______________________ 103
Washing ______________________ 267
Washing a Convertible
___________ 268
Waxing and polishing
____________ 270
Wear indicators, tires _____________ 247
What Will You See After an Airbag
Inflates?
______________________ 43
Wheel replacement
______________ 250
Wheels and tires, sizes ___________ 296
When it is time for new tires
_______ 246
Windshield washers
_____________ 103
Windshield wipers
_______________ 103
Wing mirrors
___________________ 124
Winter driving __________________ 187
Winter tires
____________________ 257
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