suspension LEXUS GS400 2000 Service Owner's Guide

SS±54
± SERVICE SPECIFICATIONSSUSPENSION AND AXLE
210 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)Part tighten
N´mkgf´cmft´lbf
REAR
Hub nut1031,05076
Brake caliper x Axle carrier1041,06577
Axle carrier x Upper suspension arm1081,10080
Backing plate x Axle carrier5960043
Drive shaft x Axle hub2892,950213
No.2 lower suspension arm x Axle carrier11 01,12081
No.1 lower suspension arm x Axle carrier7576555
Drive shaft x Differential side gear shaft6869550
Differential drain plug4950039
Differential filler plug4950039
Differential mounting boltFront
Rear123
1421,250
1,45090
105
Ring gear set boltSee page SA±73
Companion flange lock nutSee page SA±73
Differential carrier retainer set bolt2222516
Differential carrier cover set bolt4747534
Breather plug2121015
Suspension support x Body Upper side
Lower side64
18650
18547
13
Piston rod x Suspension support2728020
Upper suspension arm x Body8890065
No.1 lower suspension arm x Body7576555
No.2 lower suspension arm x Stabilizer bar link x Height control sensor link3030522
No.2 lower suspension arm x Shock absorber11 01,12081
No.2 lower suspension arm x Body11 01,12081
ABS speed sensor wire harness x Toe control link5.45548 in.´lbf
Toe control link x Axle carrier5960044
Toe control link x Body5960044
Stabilizer bar x Stabilizer bar link6566048
Stabilizer bar bracket x Body1818513
ABS speed sensor x Axle carrier7.88069 in.´lbf
Parking brake cable x Backing plate7.88069 in.´lbf
Suspension member brace x Body5051037
Differential x Propeller shaft7980558
Oil deflector x Differential carrier cover7.07062 in.´lbf

± SERVICE SPECIFICATIONSENGINE MECHANICAL (2JZ±GE)
SS±9
165 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)Part tightened
N´mkgf´cmft´lbf
Drive plate x Torque converter clutch4849035
Rear support member x Engine rear mounting insulator13.513510
Front suspension crossmember x Engine mounting insulator7071452
PS gear housing x Front suspension member6566048
Sliding yoke x Steering intermediate shaft3536026
Transmission control rod x Shift lever131309
Transmission control rod x Transmission131309
A/C compressor x Cylinder block Stud bolt
Bolt and nut26
52265
53019
38
Fuel inlet hose x Fuel pipe support2930022
Front suspension member brace x Front suspension member5859043
Front suspension member brace x Strut bar bracket plate5859043
Connecting rod cap x Connecting rod 1st
2nd30
Turn 90°300
Turn 90°22
Turn 90°
Main bearing cap x Cylinder block 1st
2nd45
Turn 90°450
Turn 90°33
Turn 90°
Rear oil seal retainer x Cylinder block6.06053
Engine mounting bracket x Cylinder block5959044
Fuel inlet pipe x Cylinder block2929021
No.1 oil pipe x Cylinder block5555041
Oil filter bracket x Cylinder block9090066
No.2 water bypass pipe x Water pump2121015
No.2 water bypass pipe x Cylinder block2121015
Generator x Water pump4040030
Generator x Cylinder block4040030
Front exhaust pipe x Center exhaust pipe4444032
Center exhaust pipe x Tailpipe4444032
Heated oxygen sensor x Front exhaust pipe4545033

SF0OB±03
B08325
Bank 1 Sensor 1
N´m (kgf´cm, ft´lbf): Specified torque
Heated Oxygen Sensor Connector
(On Water Pump)
Clamp
45 (450, 33)Heated Oxygen Sensor
B08326
Bank 1 Sensor 2
N´m (kgf´cm, ft´lbf) : Specified torque
Heated Oxygen Sensor Connector
Case Clamp
Front Suspension Member Brace
45 (450, 33)Heated Oxygen Sensor
SF±64
± SFI (2JZ±GE)HEATED OXYGEN SENSOR
1530 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
HEATED OXYGEN SENSOR
COMPONENTS

SR0DF±03
SR±2
± STEERINGTROUBLESHOOTING
2172 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 the order shown. If necessary, repair or replace these parts.
SymptomSuspect AreaSee page
Hard steering
3. Tires (Improperly inflated)
4. Power steering fluid level (Low)
5. Drive belt (Loose)
6. Front wheel alignment (Incorrect)
7. Steering system joints (Worn)
8. Suspension arm ball joints (Worn)
9. Steering column (Binding)
10.Power steering gear
11. PPS systemSA±2
SR±4
±
SA±4
±
SA±27
SA±37
±
SR±42
SR±59
Poor return
1. Tires (Improperly inflated)
2. Front wheel alignment (Incorrect)
3. Steering column (Binding)
4. Power steering gearSA±2
SA±4
±
SR±42
Excessive play
1. Steering system joints (Worn)
2. Suspension arm ball joints (Worn)
3. Intermediate shaft, Universal joint, Sliding yoke (Worn)
4. Front wheel bearing (Worn)
5. Power steering gear
6. PPS system±
SA±27
SA±37
±
SA±10
SR±42
SR±59
Abnormal noise
1. Power steering fluid level (Low)
2. Steering system joints (Worn)
3. Power steering gearSR±4
±
SR±42
HINT:
When the problem occurs on the power tilt and telescopic steering system, refer to the DI section.
(See page DI±517)

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

F02314
± SUSPENSION AND AXLEFRONT AXLE HUB
SA±11
2011 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) Remove the 2 bolts and steering knuckle from the lower
ball joint.
Torque: 113 N´m (1,150 kgf´cm, 83 ft´lbf)

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)

SA0SW±01
F03427
ABS Speed Sensor
Wire HarnessToe Control
LinkFender Apron Seal
N´m (kgf´cm, ft´lbf)
: Specified torque
49 (500, 36)
5.4 (55, 48 in.´lbf)
59 (600, 44)
± SUSPENSION AND AXLETOE CONTROL LINK
SA±101
2101 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
TOE CONTROL LINK
COMPONENTS

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.