Lexus GS300/400 (2000 year). Service manual - part 274

R00054

SST

SA–78

–

SUSPENSION AND AXLE

REAR DIFFERENTIAL CARRIER

2078

If the backlash is not within the specification replace the washer
on the ring gear side with one of a different thickness using the
following procedure.

Adjusting washer thickness

No.               Thickness    mm (in.)

No.                    Thickness    mm (in.)

No.                    Thickness    mm (in.)

02                     2.02 (0.0795)

32                          2.32 (0.0913)

62                          2.62 (0.1031)

04                     2.04 (0.0803)

34                          2.34 (0.0921)

64                          2.64 (0.1039)

06                     2.06 (0.0811)

36                          2.36 (0.0929)

66                          2.66 (0.1047)

08                     2.08 (0.0819)

38                          2.38 (0.0937)

68                          2.68 (0.1055)

10                     2.10 (0.0827)

40                          2.40 (0.0945)

70                          2.70 (0.1063)

12                     2.12 (0.0835)

42                          2.42 (0.0953)

72                          2.72 (0.1071)

14                     2.14 (0.0843)

44                          2.44 (0.0961)

74                          2.74 (0.1079)

16                     2.16 (0.0850)

46                          2.46 (0.0969)

76                          2.76 (0.1087)

18                     2.18 (0.0858)

48                          2.48 (0.0976)

78                          2.78 (0.1094)

20                     2.20 (0.0866)

50                          2.50 (0.0984)

80                          2.80 (0.1102)

22                     2.22 (0.0874)

52                          2.52 (0.0992)

82                          2.82 (0.1100)

24                     2.24 (0.0882)

54                          2.54 (0.1000)

84                          2.84 (0.1118)

26                     2.26 (0.0890)

56                          2.56 (0.1008)

86                          2.86 (0.1126)

28                     2.28 (0.0898)

58                          2.58 (0.1016)

–

30                     2.30 (0.0906)

60                          2.60 (0.1024)

–

14.

MEASURE 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 the measured preload is less than the specification, replace
the washer of the ring gear’s tooth surface side with a thicker
one.
If the preload is greater than the specification, replace the
washer of the ring gear’s tooth surface side with a thinner one.
HINT:
Changing the snap ring thickness by 0.02 mm (0.0008 in.) will
change the total preload by approx. 0.1 N·m (1 kgf·cm, 0.9
in.·lbf).

R00020

SA1125

Proper Contact Pattern

Forward

Reverse

SA1195

–

SUSPENSION AND AXLE

REAR DIFFERENTIAL CARRIER

SA–79

2079

15.

INSPECT TOOTH CONTACT PATTERN

(a)

Coat 3 or 4 teeth at the 3 different positions on the ring
gear with red lead.

(b)

Hold the companion flange firmly and rotate the ring gear
in both directions.

(c)

Inspect the tooth contact pattern.

If tooth contact pattern is not correct, replace the adjusting
washer installed on the front of the drive pinion rear bearing to
adjust it.
NOTICE:
Make sure to always use a new one when replacing adjust-
ing washer.
HINT:
Refer to the table on the next page for selection of the adjusting
washer.

V02917

Tooth contact pattern

Forward

Reverse

+ 0.08 mm
(+ 0.0031 in.)

+ 0.14 mm
(+ 0.0055 in.)

Adjusting washer selection

Replacing the washer with one
0.08 mm (0.0031 in.) thicker will
give proper contact pattern.

– 0.08 mm
(– 0.0031 in.)

– 0.14 mm
(– 0.0055 in.)

Replacing the washer with one
0.14 mm (0.0055 in.) thicker will
give proper contact pattern.

Replacing the washer with one
0.08 mm (0.0031 in.) thicker
will give proper contact pattern.

Replacing the washer with one
0.14 mm (0.0055 in.) thicker will
give proper contact pattern.

SA–80

–

SUSPENSION AND AXLE

REAR DIFFERENTIAL CARRIER

2080

HINT:
Adjust washers in 42 (different thickness in 0.01 mm (0.004 in.))
units are available.

No.           Thickness   mm (in.)

No.                 Thickness   mm (in.)

No.                Thickness   mm (in.)

87                 1.87 (0.0736)

01                        2.01 (0.0791)

15                       2.15 (0.0846)

88                 1.88 (0.0740)

02                        2.02 (0.0795)

16                       2.16 (0.0850)

89                 1.89 (0.0744)

03                        2.03 (0.0799)

17                       2.17 (0.0854)

90                 1.90 (0.0748)

04                        2.04 (0.0803)

18                       2.18 (0.0858)

91                 1.91 (0.0752)

05                        2.05 (0.0807)

19                       2.19 (0.0862)

92                 1.92 (0.0756)

06                        2.06 (0.0811)

20                       2.20 (0.0866)

93                 1.93 (0.0760)

07                        2.07 (0.0815)

21                       2.21 (0.0870)

94                 1.94 (0.0764)

08                        2.08 (0.0819)

22                       2.22 (0.0874)

95                 1.95 (0.0768)

09                        2.09 (0.0823)

23                       2.23 (0.0878)

96                 1.96 (0.0772)

10                        2.10 (0.0827)

24                       2.24 (0.0882)

97                 1.97 (0.0776)

11                         2.11 (0.0831)

25                       2.25 (0.0886)

98                 1.98 (0.0780)

12                        2.12 (0.0835)

26                       2.26 (0.0890)

99                 1.99 (0.0783)

13                        2.13 (0.0839)

27                       2.27 (0.0894)

00                 2.00 (0.0787)

14                        2.14 (0.0843)

28                       2.28 (0.0898)

16.

REMOVE DIFFERENTIAL CARRIER RETAINERS 
(See page 

SA–67

)

17.

REMOVE DIFFERENTIAL CASE (See page 

SA–67

)

18.

REMOVE DRIVE PINION (See page 

SA–67

)

19.

INSTALL SPACER ON DRIVE PINION

Install a new spacer on the drive pinion.
20.

INSTALL DRIVE PINION AND FRONT BEARING
(See step 8)

21.

INSTALL OIL SLINGER (See step 8)

R00040

SST

SA1130

SST

SST

R00587

SST

R00054

SST

–

SUSPENSION AND AXLE

REAR DIFFERENTIAL CARRIER

SA–81

2081

22.

INSTALL OIL SEAL

(a)

Apply MP grease to a new oil seal lip.

(b)

Using SST, install the oil seal until its end is flush with the
surface of the differential carrier.
SST

09316–60011 (09316–00011, 09316–00041),
09502–12010

23.

INSTALL COMPANION FLANGE

Using SST and a press, install the companion flange.

SST

09223–56010, 09325–40010

NOTICE:
Be careful not to damage the oil seal.
24.

ADJUST DRIVE PINION PRELOAD

(a)

Coat the threads and flange of a new nut with hypoid gear
oil for LSD.

(b)

Using SST, tighten the nut.
SST

09229–55010, 09330–00021

(c)

Using SST and a torque wrench, measure the preload.
SST

09229–55010

Preload (at starting):
New bearing:
1.5 – 1.8 N·m (15 – 18 kgf·cm, 13.0 – 15.6 in.·lbf)
Reused bearing:
0.5 – 0.8 N·m (5 – 8 kgf·cm, 4.3 – 6.9 in.·lbf)