2003 LEXUS LS430 differential

Fig. 73: Installing Rear Differential Side Gear Shaft Snap Ring
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Install a dial indicator to the differential carrier.
c. Tighten the SST bolt to alter the differential carrier's shape by approximately 0.1 mm
(0.004 in.).
SST 09571-50010
HINT:
Set the dial indicator to the rearmost position (upper side in the illustration) of
the area around where the side gear shaft oil seal is tapped in.
Tighten the SST bolt to apply the preload to the case bearing.
d. Turn the rin
g gear clockwise and counterclockwise several times.

Fig. 74: Installing Dial Indicator To Differential Carrier
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
e. Using a dial indicator, measure the backlash of the ring gear at 3 positions.
Backlash: 0.08 to 0.13 mm (0.0031 to 0.0051 in.)
HINT:
Write the values for reference to select a side gear shaft snap ring. If a value is not
within the specified range, replace it with one of a different thickness in the following
procedure.
f. Loosen the SST bolt and separate the SST disc from the case bearing (outer race) on
the drive pinion.

j. Using a plastic hammer, lightly tap the drive pinion side of the differential carrier.
Fig. 79: Tapping Drive Pinion Side Of Differential Carrier

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
k. Install a dial indicator onto the differential carrier.
l. Tighten the SST bolt to alter the differential carrier's shape by approximately 0.1 mm
(0.004 in.).
SST 09571-50010
HINT:
Set the dial indicator to the rearmost position (upper side in the illustration) of the area
90521-990763.92 (0.1543)90521-991014.32 (0.1701)
90521-990773.94 (0.1551)90521-991024.34 (0.1709)
90521-990783.96 (0.1559)90521-991034.36 (0.1717)
90521-990793.98 (0.1567)90521-991044.38 (0.1724)
90521-990814.00 (0.1575)90521-991054.40 (0.1732)
90521-990824.02 (0.1583)90521-991074.42 (0.1740)
90521-990834.04 (0.1591)

around where the side oil seal tapped in.
Fig. 80: Installing Dial Indicator Onto Differential Carrier

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
m. Using a dial indicator, measure the ring gear backlash.
Backlash: 0.08 to 0.13 mm (0.0031 to 0.0051 in.)
n. If the backlash is not within the specified range, replace the side gear shaft snap ring
on the rin
g gear side with one of a different thickness.

Fig. 81: Measuring Ring Gear Backlash
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
ADJUST DIFFERENTIAL RING GEAR BACKLASH
a. Install a dial indicator to the differential carrier.
b. Tighten the SST bolt to alter the differential carrier's shape by approximately 0.1 mm
(0.004 in.).
SST 09571-50010
HINT:
Set the dial indicator to the rearmost position (upper side in the illustration) of the area
around where the side oil seal tapped in.

Fig. 82: Installing Dial Indicator To Differential Carrier
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Using snap ring pliers, install the thinnest side gear shaft snap ring on the drive pinion
side.
d. Remove the dial indicator and loosen the bolt until the SST disc is separated from the
outer race.

Fig. 83: Installing Thinnest Side Gear Shaft Snap Ring On Drive Pinion Side
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
e. Using a plastic hammer, lightly tap the drive pinion side of the differential carrier.

Fig. 84: Tapping Drive Pinion Side Of Differential Carrier
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
f. Check the backlash around the ring gear. If even one backlash is smaller than the
specified value, adjust the differential ring gear backlash by replacing the side gear
shaft snap ring on the drive pinion side with a thicker one.
Backlash: 0.08 to 0.13 mm (0.0031 to 0.0051 in.)
HINT:
If a value is not within the specified range, replace it with one of a different thickness
in the following procedure.
g. Loosen the SST bolt and separate the SST disc from the case bearing (outer race) on
the drive pinion.