LEXUS GS400 2000 Service Repair Manual

R00054
SST
R00054
SST
R00243
SST
R00047
SST SA±68
± SUSPENSION AND AXLEREAR DIFFERENTIAL CARRIER
2068 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. MEASURE DRIVE PINION PRELOAD
Using SST and a torque wrench, measure the preload using the
backlash of the drive pinion and ring gear.
Preload (at starting):
0.5 ± 0.8 N´m (5 ± 8 kgf´cm, 4.3 ± 6.9 in.´lbf)
HINT:
For vehicles which have run less than 8,000 km (5,000 miles),
the preload may be large.
SST 09229±55010
Maximum preload (at starting):
1.8 N´m (18 kgf´cm, 16.0 in.´lbf)
7. CHECK TOTAL PRELOAD
Using SST and a torque wrench, measure the preload with the
teeth of the drive pinion and ring gear in contact.
SST 09229±55010
Total preload (at starting):
Drive pinion preload plus
0.5 ± 0.8 N´m (5 ± 8 kgf´cm, 4.3 ± 6.9 in.´lbf)
If necessary, disassemble and inspect the differential.
8. CHECK PINION GEAR BACKLASH
Using a dial indicator, measure the pinion gear backlash with
holding one side gear toward the case.
Maximum: 0.15 mm (0.0059 in.)
NOTICE:
Differential gears should be able to rotate.
If the backlash is not within the specification, install the correct
thrust washer (See page SA±73).
9. CHECK TOOTH CONTACT PATTERN
(See page SA±73)
10. REMOVE SIDE GEAR SHAFTS
(a) Using SST, remove the 2 side gear shafts.
SST 09520±24010
NOTICE:
Be careful not to damage the oil seal.
(b) Using screwdriver, remove the 2 snap rings from the side
gear shafts.
11. REMOVE SIDE GEAR SHAFT OIL SEALS
Using SST, remove the 2 oil seals.
SST 09308±00010
12. REMOVE DIFFERENTIAL CARRIER RETAINERS
(a) Remove the 16 bolts.

R11079
SST
SST
R00022
R15856
SST
R00052
SST
R00024
± SUSPENSION AND AXLEREAR DIFFERENTIAL CARRIER
SA±69
2069 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Using SST, remove the 2 carrier retainers and washers.
SST 09950±40011, (09951±04020, 09952±04010,
09953±04030, 09954±04010, 09955±04061,
09957±04010, 09958±04011),
09950±60010 (09951±00450)
13. REMOVE DIFFERENTIAL CASE
Take the differential case out of the carrier with lifting the ring
gear side, as shown in the illustration.
14. REMOVE O±RINGS FROM DIFFERENTIAL CARRIER
RETAINERS
Using a screwdriver, remove the 2 O±rings.
15. REMOVE SIDE BEARING OUTER RACES AND AD-
JUSTING PLATE WASHERS
Using SST and a press, remove the 2 outer races and adjusting
plate washers.
SST 09950±60020 (09951±00710),
09950±70010 (09951±07150)
16. REMOVE DRIVE PINION, SPACER AND COMPANION
FLANGE
(a) Using a chisel and hammer, loosen the staked part of the
nut.
(b) Using SST, remove the nut.
SST 09229±55010, 09330±00021
(c) Using a press, remove the drive pinion with the rear bear-
ing and remove the companion flange.
NOTICE:
Be careful not to drop the drive pinion.
(d) Remove the spacer from the drive pinion.

R00042
SST
R09981
SST
SA1320
F03478
SST
R11085
Matchmarks SA±70
± SUSPENSION AND AXLEREAR DIFFERENTIAL CARRIER
2070 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
17. REMOVE OIL SEAL
Using SST, remove the oil seal.
SST 09308±00010
18. REMOVE OIL SLINGER AND FRONT BEARING
19. REMOVE REAR BEARING FRONT DRIVE PINION
Using SST and a press, remove the rear bearing from the drive
pinion.
SST 09950±00020
20. REMOVE FRONT AND REAR BEARING OUTER
RACES AND ADJUSTING PLATE WASHER
NOTICE:
Do not remove the outer race except when replacing the
bearings.
HINT:
Measure the washer and note the thickness for reassembly.
21. REMOVE SIDE BEARINGS
Using SST, remove the 2 side bearings from the differential
case.
SST 09950±40011, (09951±04020, 09952±04010,
09953±04030, 09954±04010, 09955±04061,
09957±04010, 09958±04011),
09950±60010 (09951±00450)
22. REMOVE RING GEAR
(a) Place matchmarks on the ring gear and differential case.
(b) Remove the 10 ring gear set bolts.
(c) Using a plastic hammer, tap on the ring gear to separate
it from the differential case.

SA1279
± SUSPENSION AND AXLEREAR DIFFERENTIAL CARRIER
SA±71
2071 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
23. DISASSEMBLE DIFFERENTIAL CASE
(a) Using a pin punch and hammer, remove the straight pin.
(b) Remove these parts from the differential case:

Pinion shaft

2 pinion gears

2 pinion gear thrust washers

2 side gears

2 side gear thrust washers

SA0R4±01
SA3213
D AB
C Front
F03479
A
B
F02401
± SUSPENSION AND AXLEREAR WHEEL ALIGNMENT
SA±7
2007 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REAR WHEEL ALIGNMENT
INSPECTION
1. MEASURE VEHICLE HEIGHT (See page SA±4)
2. INSTALL CAMBER±CASTER±KINGPIN GAUGE
ONTO WHEEL ALIGNMENT TESTER
Follow the specific instructions of the equipment manufacturer.
3. INSPECT CAMBER
Camber
Left±right error±0°47' ± 30' (±0.78° ± 0.5°)
30' (0.5°) or less
4. INSPECT TOE±IN
Toe±in
(total)A + B: 0°08' ± 12' (0.13° ± 0.2°)
C ± D: 1.4 ± 2 mm (0.056 ± 0.08 in.)
5. ADJUST CAMBER AND TOE±IN
(a) Measure the lengths of the toe control link and No.2 lower
suspension arm, as shown in the illustration.
Length: A ± B = 4.0 mm (0.16 in.) or less
If they are not within the specifications, adjust the lengths of
them by turning the adjusting cam, as shown, until (A ± B) is less
than 4.0 mm (0.16 in.).
(b) Measure the camber and toe±in.
(c) Adjust the camber.
(1) Loosen the camber adjusting cam nut of lower sus-
pension arm No.2.
(2) Turn the camber adjusting cam of lower suspension
arm No.2 and adjust camber.
HINT:
Camber changes about 5.0' (0.08°) with each graduation of the
cam.
(3) Torque the camber adjusting cam nut.
Torque: 110 N´m (1,120 kgf´cm, 81 ft´lbf)

F02402
SA±8
± SUSPENSION AND AXLEREAR WHEEL ALIGNMENT
2008 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(d) Adjust the toe±in.
(1) Loosen the camber adjusting cam nut of toe control
link.
(2) Turn the camber adjusting cam of toe control link
and adjust toe±in.
HINT:
Camber changes about 5.0' (0.08°) with each graduation of the
cam.
(3) Torque the camber adjusting cam nut.
Torque: 49 N´m (500 kgf´cm, 36 ft´lbf)

SA0SE±01
R15896
SST
SA1173
SST
R09980
SST
R15895
SST
SA1176
SA±72
± SUSPENSION AND AXLEREAR DIFFERENTIAL CARRIER
2072 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REPLACEMENT
1. REPLACE COMPANION FLANGE DUST DEFLECTOR
(a) Using SST and a press, remove the dust deflector.
SST 09950±00020, 09950±60010 (09951±00510)
(b) Using SST and a press, install a new dust deflector.
SST 09316±60011 (09316±00011)
2. REPLACE SIDE GEAR SHAFT DUST COVER
(a) Using SST and a press, remove the dust cover.
SST 09950±00020
(b) Using SST and a press, install a new dust cover.
SST 09502±24010, 09950±60020 (09951±00780),
09950±70010 (09951±07150)
HINT:
If the dust cover does not fit snugly against the flange of the side
gear shaft, use a screwdriver to drive it down.

SA1181
SA0SF±03
SA1178
W02619
SA1280
± SUSPENSION AND AXLEREAR DIFFERENTIAL CARRIER
SA±73
2073 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REASSEMBLY
1. ADJUST DIFFERENTIAL PINION GEAR BACKLASH
(a) Install the 2 proper thrust washers on the side gears.
HINT:
Using the table below, select thrust washers which will ensure
that the backlash is within the specification.
Thrust washer thickness:
Thickness mm (in.)Thickness mm (in.)
1.50 (0.059)1.75 (0.069)
1.55 (0.061)1.80 (0.071)
1.60 (0.063)1.85 (0.073)
1.65 (0.065)1.90 (0.075)
1.70 (0.067)±
(b) Install the 2 side gears, pinion gears, pinion gear thrust
washers and pinion shaft in the differential case.
HINT:
Align the holes of the differential case and pinion shaft.
(c) Push the 2 side gear shafts gently into the differential
case by hand and install them.
(d) Using a dial indicator, measure the pinion gear backlash
with holding one side gear toward the case.
Maximum: 0.15 mm (0.0059 in.)
NOTICE:
Differential gears should be able to rotate.
If the backlash is not within the specification, install the 2 side
gear thrust washers with different thicknesses.
(e) Remove the 2 side gear shafts.
2. INSTALL STRAIGHT PIN AND STAKE DIFFERENTIAL
CASE
(a) Using a pin punch and hammer, install the straight pin
through the differential case and hole of the pinion shaft.
(b) Stake the differential case.

SA1143
Boiling Water
SA1158
Matchmarks
SA1148
SA1180
60 ± 90° 64 N´m (650 kgf´cm, 47 ft´lbf)
R15897
SST
SST SA±74
± SUSPENSION AND AXLEREAR DIFFERENTIAL CARRIER
2074 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
3. INSTALL RING GEAR ON DIFFERENTIAL CASE
(a) Clean the contact surfaces of the differential case and the
threads of the ring gear and differential case.
(b) Heat the ring gear in boiling water.
(c) Carefully remove the ring gear from the boiling water.
(d) After the moisture on the ring gear has completely evapo-
rated, quickly install the ring gear to the differential case.
HINT:
Align the matchmarks on the ring gear and the differential case.
(e) Tighten 2 of the bolts temporarily so that the bolt holes in
the ring gear and differential case are not misaligned.
NOTICE:
The ring gear set bolts should not be tightened until the
ring gear has cooled sufficiently.
4. INSTALL RING GEAR SET BOLTS
(a) After the ring gear has cooled sufficiently, install new 10
ring gear set bolts to which thread lock has been applied.
Thread lock:
Part No. 08833±00100, THREE BOND 1360 K or equiv-
alent.
NOTICE:
New ring gear set bolts should be used in every case.
(b) Torque the 10 set bolts uniformly and a little at a time.
Torque: 64 N´m (650 kgf´cm, 47 ft´lbf)
(c) Tighten the bolts further by 60 ± 90°.
NOTICE:
Tighten the bolts in diagonally opposite pairs.
5. INSTALL SIDE BEARINGS
Using SST and a press, install the 2 side bearings.
SST 09710±30050, 09950±60010 (09951±00450),
09950±70010 (09951±07150)

R15898
SST
SST
R00055
SST
R00045SST
± SUSPENSION AND AXLEREAR DIFFERENTIAL CARRIER
SA±75
2075 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. INSTALL DRIVE PINION BEARING OUTER RACES
AND ADJUSTING WASHER
HINT:

The adjusting washer is used for adjusting the tooth con-
tact pattern. 42 types of washer with different thicknesses
are available.

First fit a washer with the same thickness as the washer
which was removed, then after checking the tooth contact
pattern, replace the washer with one of a different thick-
ness if necessary.

When removing an adjusting washer, be sure to replace
it with a new one.
(a) Using SST and a press, install the front bearing outer
race.
SST 09950±60020 (09951±00710),
09950±70010 (09951±07150)
(b) Using SST and a press, install a new adjusting washer to
the rear bearing outer race.
SST 09255±10012, 09950±70010 (09951±07150)
7. INSTALL REAR BEARING TO DRIVE PINION
Using SST and a press, install the rear bearing.
SST 09502±24010
8. TEMPORARILY INSTALL DRIVE PINION, FRONT
BEARING, OIL SLINGER AND COMPANION FLANGE
(a) Install the drive pinion in the differential carrier.
(b) Using SST and a press, install the front bearing on the
drive pinion.
SST 09316±60011 (09316±00011), 09608±04031
HINT:
Assemble the spacer and oil seal after adjusting the tooth con-
tact pattern.
(c) Install the oil slinger.