2003 LEXUS LS430 differential

Fig. 15: Inspecting Runout Of Differential Ring Gear
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
18.INSPECT DIFFERENTIAL RING GEAR BACKLASH
a. Using a dial indicator, measure the backlash of the ring gear at 3 points.
Backlash: 0.08 to 0.13 mm (0.0031 to 0.0051 in.)
If the backlash is not within the specification, ad
just the backlash (see step 8).

Fig. 16: Inspecting Differential Ring Gear Backlash
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
19.INSPECT TOOTH CONTACT BETWEEN RING GEAR AND DRIVE PINION
a. Coat 3 or 4 teeth at the 3 different positions on the ring gear with red lead primer.
b. Hold the companion flange firmly and rotate the ring gear in both directions.
c. Inspect the tooth contact pattern.

Fig. 19: Tooth Contact Pattern Example Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
There are 42 thicknesses of the rear differential drive pinion plate washers available in 0.01 mm
(0.004 in.) difference.
REAR DIFFERENTIAL DRIVE PINION PLATE WASHERS THICKNESS
Parts No.Thickness mm (in.)No.Parts No.Thickness mm (in.)No.
90201-700011.87 (0.0736)8790201-700222.08 (0.0819)08
90201-700021.88 (0.0740)8890201-700232.09 (0.0823)09
90201-700031.89 (0.0744)8990201-700242.10 (0.0827)10
90201-700041.90 (0.0748)9090201-700252.11 (0.0831)11
90201-700051.91 (0.0752)9190201-700262.12 (0.0835)12
90201-700061.92 (0.0756)9290201-700272.13 (0.0839)13
90201-700071.93 (0.0760)9390201-700282.14 (0.0843)14
90201-700081.94 (0.0764)9490201-700292.15 (0.0846)15
90201-700091.95 (0.0768)9590201-700302.16 (0.0850)16
90201-700101.96 (0.0772)9690201-700312.17 (0.0854)17
90201-700111.97 (0.0776)9790201-700322.18 (0.0858)18
90201-700121.98 (0.0780)9890201-700332.19 (0.0862)19
90201-700131.99 (0.0783)9990201-700342.20 (0.0866)20
90201-700142.00 (0.0787)0090201-700352.21 (0.0870)21
90201-700152.01 (0.0791)0190201-700362.22 (0.0874)22
90201-700162.02 (0.0795)0290201-700372.23 (0.0878)23
90201-700172.03 (0.0799)0390201-700382.24 (0.0882)24

20.INSPECT DIFFERENTIAL SIDE GEAR BACKLASH
a. Using a vise, hold the differential case between two aluminum plates.
b. Place a dial indicator on the tip of the pinion gear tooth at a right angle. Hold the side gear in the
differential case and check that the backlash is 0 mm (0 in.).
If the backlash is not within the specification, replace the rear differential case sub-assy with a new one.
Fig. 20: Inspecting Differential Side Gear Backlash

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
21.INSPECT RUNOUT OF DIFFERENTIAL DRIVE PINION
a. Using a dial indicator, measure the runout of the drive pinion shaft at a position 10 mm (0.39 in.)
away from the end of the shaft.
Maximum runout: 0.08 mm (0.0031 in.)
90201-700182.04 (0.0803)0490201-700392.25 (0.0886)25
90201-700192.05 (0.0807)0590201-700402.26 (0.0890)26
90201-700202.06 (0.0811)0690201-700412.27 (0.0894)27
90201-700212.07 (0.0815)0790201-700422.28 (0.0898)28

If the runout is greater than the maximum, replace the drive pinion and ring gear.
Fig. 21: Inspecting Runout Of Differential Drive Pinion

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
22.INSPECT DIFFERENTIAL DRIVE PINION PRELOAD
a. Using SST and a torque wrench, measure the preload using the backlash of the drive pinion and
ring gear.
SST 09229-55010
Drive pinion preload (at starting):
0.5 to 0.8 N.m (5 to 8 kgf.cm, 4.3 to 6.9 in..lbf)
If the preload is not within the specification, adjust the rear differential drive pinion preload or repair as
necessar
y.

Fig. 22: Inspecting Differential Drive Pinion Preload
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
23.INSPECT TOTAL PRELOAD
a. 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 0.46 to 1.37 N.m
(4.69 to 13.97 kgf.cm, 4.07 to 12.13 in..lbf)
If necessary, disassemble and inspect the differential.

Fig. 23: Inspecting Total Preload
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
24.REMOVE REAR DIFFERENTIAL SIDE GEAR SHAFT OIL SEAL
a. Using SST, remove the 2 oil seals.
SST 09308-00010

Fig. 24: Removing Rear Differential Side Gear Shaft Oil Seal
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
25.REMOVE REAR DIFFERENTIAL SIDE GEAR SHAFT SNAP RING
a. Install the SST to the rear differential carrier assy.
SST 09571-50010