2006 Lexus GS430 wheel

SECTION 6 – 3
531
SERVICE PROCEDURES AND
SPECIFICATIONS
Chassis
Specifications (GS430)532
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Specifications (GS300) 535
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Checking brake fluid 538
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.
Checking tire inflation pressure 539
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Tire information 542
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. . . . .
Run−flat tires 552
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Types of tires 553
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Rotating tires 554
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Checking and replacing tires 554
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Installing snow tires and chains 558
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Replacing wheels 560
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. . .
Aluminum wheel precautions 561
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Suspension and chassis 562
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CHASSIS
534– STEERING
Free play
Less than 30 mm (1.2 in.)
– TIRES AND WHEELS
Tire size
245/40R18 93Y or P245/40R18 93V
Tire inflation pressure
Recommended cold tire inflation pressure
Front 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
Rear 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
For sustained high speeds above 160 km/h (100 mph), in
countries where such speeds are permitted by law, add 60 kPa
(0.6 kgf/cm
2 or bar, 9 psi) to the front tires and rear tires, but
never exceed the maximum cold tire inflation pressure molded
on the tire sidewall.
Wheel size18 x 8 JJ
Wheel nut torque103 N·m (10.5 kgf·m, 76 ft·lbf.)
NOTE:
For complete information on tires (e.g. replacing tires or replacing wh\
eels), see “Checking tire inflation pressure”
through “Aluminum wheel precautions” on page 539 through 561.

CHASSIS
535
SPECIFICATIONS (GS300)
– DIFFERENTIALOil capacity Tw o −wheel drive models
Four− wheel drive models
Front
Rear
1.15 L (1.21 qt., 1.01 lmp.qt.)
0.70 L (0.73 qt., 0.61 lmp.qt.)
1.05 L (1.10 qt., 0.92 lmp.qt.)
Oil type and viscosityHypoid gear oil API GL −5
Above –18 C (0F): SAE 90
Below –18C (0F): SAE 80 or SAE 80W− 90
– AUTOMATIC TRANSMISSION
Fluid capacity Drain and refillTw o −wheel drive models
Four− wheel drive models
1.5 L (1.6 qt., 1.3 lmp.qt.)
2.7 L (2.8 qt., 2.3 lmp.qt.)
Fluid typeToyota Genuine ATF WS*
*Change automatic transmission fluid only as necessary.
Generally, it is necessary to change automatic transmission
fluid only if your vehicle is driven under one of the Special
Operating Conditions listed in your “Owner’s Manual
Supplement / Scheduled Maintenance”. When changing the
automatic transmission fluid, use only “Toyota Genuine ATF
WS” (ATF JWS3324 or NWS9638) to aid in assuring optimum
transmission performance.NOTICE
Using automatic transmission fluid other than “Toyota
Genuine ATF WS” may cause deterioration in shift
quality, locking up of your transmission accompanied
by vibration, and ultimately damage the automatic
transmission of your vehicle.

CHASSIS
537
– TIRES AND WHEELSTire size
225/50R17 94W or P225/50R17 93V
Tire inflation pressure
Recommended cold tire inflation pressure
Front 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
Rear 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
For sustained high speeds above 160 km/h (100 mph), in
countries where such speeds are permitted by law, add 50 kPa
(0.5 kgf/cm
2 or bar, 7 psi) to the front tires and rear tires, but
never exceed the maximum cold tire inflation pressure molded
on the tire sidewall.
Wheel size17 x 7 1/2 JJ
Wheel nut torque103 N·m (10.5 kgf·m, 76 ft·lbf.)
NOTE:
For complete information on tires (e.g. replacing tires or replacing wh\
eels), see “Checking tire inflation pressure”
through “Aluminum wheel precautions” on page 539 through 561.

CHASSIS
541
6. Install the tire valve cap.
If a gauge and air pump are not available, have your
vehicle checked by your Lexus dealer.
CAUTION
Be sure to reinstall the tire valve caps. Without the
valve caps, dirt or moisture could get into the
valve core and cause air leakage. If the caps have
been lost, have new ones put on as soon as
possible.
Incorrect tire inflation pressure may waste fuel, reduce
the comfort of driving, reduce tire life and make your
vehicle less safe to drive.
If a tire needs frequent refilling, have it checked by your
Lexus dealer.
CAUTION
Keep your tires properly inflated. Otherwise, the
following conditions may occur and cause an
accident resulting in death or serious injuries.
Low tire pressure (underinflation):
 Excessive wear
 Uneven wear
 Poor handling
 Possibility of bl owouts from an overheated tire
 Poor sealing of the tire bead
 Wheel deformation and/or tire separation
 A greater possibility of tire damage from road
hazards
High tire pressure (overinflation):
 Poor handling
 Excessive wear
 Uneven wear
 A greater possibility of tire damage from road
hazards

CHASSIS
546
DOT and Tire Identification Number (TIN)
63SA11a
The illustration indicates typical DOT and Tire
Identification Number (TIN)
1“DOT” symbol
2Tire Identification Number (TIN)
3Tire manufacturer’s identification mark
4Tire size code
5Manufacturer’s optional tire type code
(3 or 4 letters)
6Manufacturing week
7Manufacturing year
The “DOT” symbol certifies that the tire conforms to
applicable Federal Motor Vehicle Safety Standards.
Tire size
63ca01
The illustrations indicate typical tire sizes.
1Tire use (P=Passenger car, T=Temporary use)
2Section width (in millimeters)
3Aspect ratio (tire height to section width)
4Speed category (alphabet with one letter)
5Tire construction code
(R=Radial, D=Diagonal)
6Wheel diameter (in inches)
7Load index (2 digits or 3 digits)
8Speed symbol (alphabet with one letter)

CHASSIS
547
G63005
 1Section width
2Tire height
3Wheel diameter
Name of each section of tire
63sa14
 1Bead
2Sidewall
3Shoulder
4Tread
5Belt
6Inner liner
7Reinforcing rubber
8Carcass
9Rim lines
10Bead wires
11Chafer

CHASSIS
548
Uniform tire quality grading
This information has been prepared in accordance
with regulations issued by the National Highway
Traffic Safety Administration of the U.S. Department
of Transportation. It provides the purchasers and/or
prospective purchasers of Lexus vehicles with
information on uniform tire quality grading.
Your Lexus dealer will help answer any questions
you may have as you read this information.
DOT quality grades All passenger vehicle tires
must conform to Federal Safety Requirements in
addition to these grades. Quality grades can be
found where applicable on the tire sidewall between
tread shoulder and maximum section width. For
example: Treadwear 200 Traction AA Temperature
A
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 a half (1 − 1/2) 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. Traction
AA, A, B, C − The traction grades, from highest
to lowest, are AA, A, B and C, and they represent the
tire’s ability to stop on wet pavement as measured under
controlled conditions on specified government test
surfaces of asphalt and concrete. A tire marked C may
have poor traction performance.
Warning: The traction grade assigned to this tire is
based on braking (straight ahead) traction tests and
does not include cornering (turning) traction.
Temperature A, B, C − The temperature grades are A
(the highest), B, and C, representing the tire’ s resistance
to the generation of heat and its ability to dissipate heat
when tested under controlled conditions on a specified
indoor laboratory test wheel. Sustained high
temperature can cause the material of the tire to
degenerate and reduce tire life, and excessive
temperature can lead to sudden tire failure. The grade
C corresponds to a level of performance which all
passenger car tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades B and A
represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades for this tire are
established for a tire that is properly inflated and not
overloaded. Excessive speed, underinflation, or
excessive loading, either separately or in combination,
can cause heat buildup and possible tire failure.