wheel LEXUS GS400 2000 Service Manual Online

SA0R1±03
± SUSPENSION AND AXLETROUBLESHOOTING
SA±1
2001 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely
cause of the problem. Check each part in order. If necessary, replace these parts.
SymptomSuspect AreaSee page
Wander/pulls
5. Tires (Worn or improperly inflated)
6. Wheel alignment (Incorrect)
7. Steering linkage (Loosen or worn)
8. Hub bearings (Loosen or worn)
9. Steering gear (Out of adjustment or broken)
10.Suspension parts (Worn out)SA±2
SA±4
SA±7
±
SA±9
SA±43
±
±
Bottoming
1. Vehicle (Overloaded)
2. Spring (Weak)
3. Shock absorber (Worn out)±
SA±17
SA±86
SA±21
SA±89
Sways/pitches
1. Tires (Worn or improperly inflated)
2. Stabilizer bar (Bent or broken)
3. Shock absorber (Worn out)SA±2
SA±39
SA±105
SA±21
SA±89
Front wheel shimmy
1. Tires (Worn or improperly inflated)
2. Wheels (Out of balance)
3. Shock absorber (Worn out)
4. Wheel alignment (Incorrect)
5. Ball joints (Worn)
6. Hub bearings (Loosen or worn)
7. Steering linkage (Loosen or worn)
8. Steering gear (Out of adjustment or broken)SA±2
SA±2
SA±21
SA±4
SA±34
SA±9
±
±
Abnormal tire wear
1. Tires (Improperly inflated)
2. Wheel alignment (Incorrect)
3. Suspension parts (Worn out)
4. Shock absorber (Worn out)SA±2
SA±4
SA±7
±
SA±21
SA±89
Noise in rear differential
1. Oil level (Low or wrong grade)
2. Excessive backlash between pinion and ring gear
3. Ring, pinion or side gears (Worn or chipped)
4. Pinion shaft bearing (Worn)
5. Side bearing (Worn)SA±61
SA±63
SA±63
SA±63
SA±63
Oil leak from rear differential
1. Oil level (Too high or wrong grade)
2. Drive pinion oil seal (Worn or damaged)
3. Side gear oil seal (Worn or damaged)
4. Companion flange (Loose or damaged)
5. Side gear shaft (Damaged)SA±61
SA±63
SA±60
SA±67
SA±63

SA0R6±01
F02311
R11097
F02313
SST
SA±10
± SUSPENSION AND AXLEFRONT AXLE HUB
2010 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE FRONT WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
2. REMOVE FRONT BRAKE CALIPER AND DISC
(a) Remove the 2 bolts and brake caliper from the steering
knuckle.
Torque: 118 N´m (1,200 kgf´cm, 87 ft´lbf)
(b) Support the brake caliper securely.
(c) Remove the disc.
3. CHECK BEARING BACKLASH AND AXLE HUB
DEVIATION
(a) Using a dial indicator near the center of the axle hub and
check the backlash in the bearing shaft direction.
Maximum: 0.05 mm (0.0020 in.)
If the blacklash exceeds the maximum, replace the bearing.
(b) Using a dial indicator, check the deviation at the surface
of the axle hub outside the hub bolt.
Maximum: 0.05 mm (0.0020 in.)
If the deviation exceeds the maximum, replace the axle hub.
4. REMOVE ABS SPEED SENSOR
Remove the bolt and ABS speed sensor.
Torque: 7.8 N´m (80 kgf´cm, 69 in.´lbf)
5. REMOVE STEERING KNUCKLE
(a) Remove the upper side of the clip and nut.
Torque: 87 N´m (890 kgf´cm, 64 ft´lbf)
(b) Using SST, remove the steering knuckle from the upper
suspension arm.
SST 09610±20012

SA0SV±01
SA±100
± SUSPENSION AND AXLEREAR LOWER SUSPENSION ARM
2100 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal (See page SA±98).
AFTER INSTALLATION, CHECK REAR WHEEL ALIGNMENT (See page SA±7)

SA0SX±01
F02390
SST
F02391
Matchmarks SA±102
± SUSPENSION AND AXLETOE CONTROL LINK
2102 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE REAR WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
2. REMOVE REAR FENDER APRON SEAL
3. DISCONNECT ABS SPEED SENSOR WIRE HARNESS
FROM TOE CONTROL LINK
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
4. REMOVE TOE CONTROL LINK
(a) Remove the nut.
Torque: 59 N´m (600 kgf´cm, 44 ft´lbf)
HINT:
At the time of installation, after stabilizing the suspension,
torque the nut.
(b) Using SST, disconnect the toe control link from the axle
carrier.
SST 09610±20012
NOTICE:
Be careful not to damage the dust cover.
(c) Place the matchmarks on the adjusting cam and suspen-
sion member.
(d) Remove the nut, adjusting cam No.2, adjusting cam No.1
and the toe control link.
Torque: 49 N´m (500 kgf´cm, 36 ft´lbf)
HINT:
At the time of installation, after stabilizing the suspension,
torque the nut.

SA0SZ±01
SA±104
± SUSPENSION AND AXLETOE CONTROL LINK
2104 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal (See page SA±102).
AFTER INSTALLATION, CHECK REAR WHEEL ALIGNMENT (See page SA±7)

SA0R9±01
± SUSPENSION AND AXLEFRONT AXLE HUB
SA±15
2015 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal (See page SA±10).
AFTER INSTALLATION, CHECK ABS SPEED SENSOR SIGNAL (See page DI±389) AND FRONT
WHEEL ALIGNMENT (See page SA±4)

SA0RA±01
F02311
R05811
SST
R05812
Washer SA±16
± SUSPENSION AND AXLEFRONT WHEEL HUB BOLT
2016 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
FRONT WHEEL HUB BOLT
REPLACEMENT
1. REMOVE FRONT WHEEL
2. REMOVE BRAKE CALIPER AND DISC
(a) Remove the 2 bolts and remove the brake caliper from the
steering knuckle.
(b) Support the brake caliper securely.
(c) Remove the disc.
3. REMOVE HUB BOLT
Using SST, remove the hub bolt.
SST 09628±10011
4. INSTALL HUB BOLT
(a) Install a washer and nut to the bolt, as shown in the il-
lustration.
(b) Turn the wheel nut to pull the hub bolt until the underside
of the hub bolt head touches the axle hub.
5. INSTALL DISC AND BRAKE CALIPER
(a) Install the disc.
(b) Install the brake caliper and 2 bolts to the steering
knuckle.
Torque: 118 N´m (1,200 kgf´cm, 87 ft´lbf)
6. INSTALL FRONT WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)

SA0RC±01
F02311
F02313
SST
F02398
SA±18
± SUSPENSION AND AXLEFRONT SHOCK ABSORBER
2018 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE FRONT WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
2. REMOVE BRAKE CALIPER
(a) Remove the 2 bolts and caliper from the steering knuckle.
Torque: 118 N´m (1,200 kgf´cm, 87 ft´lbf)
(b) Support the brake caliper securely.
3. DISCONNECT ABS SPEED SENSOR AND WIRE
HARNESS
(a) Remove the bolt and ABS speed sensor.
Torque: 7.8 N´m (80 kgf´cm, 69 in.´lbf)
(b) Remove the bolt and ABS speed sensor wire harness.
Torque: 5.0 N´m (55 kgf´cm, 48 in.´lbf)
4. DISCONNECT UPPER SUSPENSION ARM FROM
STEERING KNUCKLE
(a) Remove the clip and nut.
Torque: 87 N´m (890 kgf´cm, 64 ft´lbf)
(b) Using SST, disconnect the upper suspension arm from
the steering knuckle.
SST 09610±20012
5. DISCONNECT STABILIZER BAR FROM STABILIZER
BAR LINK
Remove the bolt and nut, and disconnect the stabilizer bar from
the stabilizer bar link
Torque: 55 N´m (560 kgf´cm, 41 ft´lbf)

SA0R2±01
R03031
R13504
SA±2
± SUSPENSION AND AXLETIRE AND WHEEL
2002 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
TIRE AND WHEEL
INSPECTION
1. INSPECT TIRE
(a) Check the tires for wear and for the proper inflation pres-
sure.
Cold tire inflation pressure:
(GS 400)
Tire sizeFront
kPa (kgf/cm2
or bar, psi)
Rear
kPa (kgf/cm2
or bar, psi)
225/55R16 94V*1220 (2.2, 32)
*2290 (2.9, 42)
*1220 (2.2, 32)
*2290 (2.9, 42)
235/45ZR17*1230 (2.3, 33)
*2300 (3.0, 44)
*1230 (2.3, 33)
*2300 (3.0, 44)
(GS 300)
Tire sizeFront
kPa (kgf/cm2
or bar, psi)
Rear
kPa (kgf/cm2
or bar, psi)
P215/60R16 94V*1210 (2.1, 30)
*2300 (3.0, 44)
*1210 (2.1, 30)
*2300 (3.0, 44)
225/55R16 94V*1220 (2.2, 32)
*2300 (3.0, 44)
*1220 (2.2, 32)
*2300 (3.0, 44)
*1: For driving under 160 km/h (100 mph)
*
2: For driving at 160 km/h (100 mph) or over
(b) Check the tire runout.
Tire runout: 1.4 mm (0.055 in.) or less
2. ROTATING TIRES
HINT:
See the illustration for where to rotate each tire.

R07928
F04238
16 inch wheel
17 inch wheelApprox. 25 mm (0.984 in.)
Approx. 25 mm (0.984 in.)
R11097
± SUSPENSION AND AXLETIRE AND WHEEL
SA±3
2003 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
3. INSPECT WHEEL BALANCE
(a) Check and adjust the off±the±car balance.
(b) If necessary, check and adjust the on±the±car balance.
Unbalance after adjustment: 8.0 g (0.018 lb) or less
NOTICE:

Adhere the sticking type balance weight to the flat
position shown in the illustration.

Push the balance weight securely with a finger to ad-
here it to the position.
(Pushing force: 10 kgf/more than 2 secs.)

After cleaning the surface which the balance weight
will be adhered to of dirt, oil and water with a cleaning
detergent, adhere the balance weight to the surface.

Do not touch the sticking surface of the tape.

Do not use the once used balance weight.

Please use the TOYOTA genuine sticking type bal-
ance weight.
4. CHECK WHEEL BEARING LOOSENESS
(a) Check the backlash in the bearing shaft direction.
Maximum: 0.05 mm (0.0020 in.)
(b) Check the axle hub deviation.
Maximum: 0.05 mm (0.0020 in.)
5. CHECK FRONT SUSPENSION FOR LOOSENESS
6. CHECK STEERING LINKAGE FOR LOOSENESS
7. CHECK BALL JOINT FOR LOOSENESS AND
EXCESSIVE PLAY (See page SA±34)
8. CHECK SHOCK ABSORBER WORKS PROPERLY

Check for oil leak

Check mounting bushings for wear

Bounce front and rear of the vehicle