2006 Lexus GS430 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2006 PROD. OWNER'S MANUAL (OM30786U)

ENGINE
537
SPARK PLUGS
62R031c
GS430
Your engine is fitted with iridiumtipped spark plugs.
NOTICE
Use only iridiumtipped spark plugs. Do not adjust
gaps for engine performance or smooth drivability.
G62009a
 GS300
Your engine is fitted with the designated iridiumtipped
spark plugs.
NOTICE
Use the designated iridiumtipped spark plugs only. Do
not adjust gaps for engine performance or smooth
drivability.

ENGINE
538

SECTION 6 – 3
539
SERVICE PROCEDURES AND
SPECIFICATIONS
Chassis
Specifications (GS430)540
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications (GS300) 544
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking brake fluid 547
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
Checking tire inflation pressure 548
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire information 551
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
Run−flat tires 561
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . .
Types of tires 562
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . .
Rotating tires 563
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . .
Checking and replacing tires 563
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing snow tires and chains 567
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing wheels 569
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . .
Aluminum wheel precautions 570
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension and chassis 571
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CHASSIS
540
SPECIFICATIONS (GS430)
– DIFFERENTIALOil capacity
1.35 L (1.42 qt., 1.19 lmp.qt.)
Oil type and viscosityToyota Genuine Differential Synthetic gear oil
API GL− 5 SAE 75W− 90 or its equivalent
NOTE:
The following label is affixed on the right side of the
differential carrier. Use the type and viscosity shown on
the label when the differential oil is replaced.
Synthetic oil information labelNOTICE
Use of differential oil other than “Toyota Genuine
Differential Synthetic gear oil API GL5 SAE 75W90” or its
equivalent may damage the dif ferential gear of your vehicle
and diminish fuel efficiency. For the reasons mentioned
above, Lexus recommends use of “Toyota Genuine
Differential Synthetic gear oil API GL5 SAE 75W90”.
Another differential oil of matching quality can also be
used, (but note that despite the similarity in nomenclature
between “Toyota Genuine Differential Synthetic gear oil
API GL5 SAE 75W90” and oils that meet SAE 75W90
specifications, compliance with the SAE specification
does not guarantee that an oil has all characteristic
required to avoid the problem described above.) If you are
unable to locate an equivalent to “Toyota Genuine
Differential Synthetic gear oil API GL5 SAE 75W90”,
contact your Lexus dealer for further details or another
duly qualified and equipped professional.

CHASSIS
541
– AUTOMATIC TRANSMISSION
Fluid capacity Drain and refill
1.7 L (1.5 qt., 1.8 lmp.qt.)
Fluid typeToyota Genuine ATF Type 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
Type WS” ( ATF JWS3324 or NWS9638) to aid in assuring
optimum transmission performance.NOTICE
Using automatic transmission fluid other than “Toyota
Genuine ATF T ype WS” may cause deterioration in shift
quality, locking up of your transmission accompanied
by vibration, and ultimately damage the automatic
transmission of your vehicle.
– BRAKES
Pedal clearance *
173 mm (2.9 in.) Min.
Pedal free play1.0 − 2.0 mm (0.04 − 0.08 in.)
Brake pad wear limit1.0 mm (0.04 in.)
Parking brake lining wear limit1.0 mm (0.04 in.)
Parking brake adjustment *25 − 7 clicks
Fluid typeSAE J1703 or FMVSS No. 116 DOT 3
*1Minimum pedal clearance when depressed with the force of 196 N (20 kgf,\
44 lbf.) with the engine running
*
2Parking brake adjustment when depressed with the force of 300 N (30.6 k\
gf, 67.4 lbf.)

CHASSIS
542– STEERING
Free play
Less than 30 mm (1.2 in.)
– TIRES AND WHEELS
Front and rear:
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.)

CHASSIS
543
Spare (Vehicles with standard tires only):Tire size
T155/70D17 110M
Tire inflation pressure420 kPa (4.3 kgf/cm2, 4.2 bar, 60 psi)
Wheel size17 x 4T
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 548 through 570.

CHASSIS
544
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 Type 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
Type WS” ( ATF JWS3324 or NWS9638) to aid in assuring
optimum transmission performance.NOTICE
Using automatic transmission fluid other than “Toyota
Genuine ATF T ype WS” may cause deterioration in shift
quality, locking up of your transmission accompanied
by vibration, and ultimately damage the automatic
transmission of your vehicle.