Lexus RX300 (MCU15). Manual — part 558
SA2351
SST
SA2352
F01251
F01252
F01253
SA–72
–
SUSPENSION AND AXLE
REAR DIFFERENTIAL CARRIER
LEXUS RX300 (RM785E)
(d)
Adjusting the drive pinion preload by tightening the com-
panion flange nut.
Using SST to hold the flange, torque the nut.
Torque:
108 – 235 N·m (1,100 –2,400 kgf·cm, 80 –174 ft·lbf)
SST
09330–00021
NOTICE:
As there is no spacer, torque a little at a time, being careful
not to overtighten it.
(e)
Using a torque wrench, measure the preload.
Preload (at starting):
New bearing:
1.1 – 1.7 N·m (11 – 17 kgf·cm, 9.6 – 14.8 in.·lbf)
Reused bearing:
0.6 – 0.9 N·m (6 – 9 kgf·cm, 5.2 – 7.8 in.·lbf)
8.
INSTALL DIFFERENTIAL CASE IN CARRIER
(a)
Place the 2 bearing outer races on their respective bear-
ings. Make sure the left and right races are not inter-
changed.
(b)
Install the differential case in the carrier.
9.
ADJUST RING GEAR BACKLASH
(a)
Install only the plate washer on the ring gear back side.
(b)
Snug down the washer and bearing by tapping on the ring
gear with a plastic hammer.
(c)
Using a dial indicator, hold the companion flange and
measure the ring gear backlash.
Backlash (reference):
0.13 – 0.18 mm (0.0051 – 0.0071 in.)
(d)
Select a ring gear back side plate washer so that the back-
lash is 0.13 – 0.18 mm (0.0051 – 0.0071 in.).
(e)
Select a ring gear teeth side washer so that there is no
clearance between the outer race and case.
(f)
Remove the plate washer and differential case.
(g)
Install the plate washer to the ring gear back side.
F01254
F01255
RA0090
F01256
SST
–
SUSPENSION AND AXLE
REAR DIFFERENTIAL CARRIER
SA–73
LEXUS RX300 (RM785E)
(h)
Place the outer plate washer onto the differential case to-
gether with the outer race, and install the differential case
with the outer race into the carrier.
(i)
Using a plastic hammer, snug down the washer and bear-
ing by tapping the ring gear.
(j)
Using a dial indicator, hold the companion flange and
measure the ring gear backlash.
Backlash: 0.13 – 0.18 mm (0.0051 – 0.0071 in.)
If it is not within the specification, adjust it by either increasing
or decreasing the thickness of washers on both sides by an
equal amount.
HINT:
There should be clearance between the plate washer and case.
Ensure that there is ring gear backlash.
10.
ADJUST SIDE BEARING PRELOAD
(a)
After adjusting the ring gear backlash as reference, re-
move the teeth side plate washer.
(b)
Using a micrometer, measure the thickness of the re-
moved plate washer.
(c)
Install a new washer 0.06 – 0.09 mm (0.0024 – 0.0035 in.)
thicker than the removed washer.
HINT:
Select a washer which can be pressed in 2/3 of the way by fin-
ger.
(d)
Using SST and a hammer, tap in the plate washer.
SST
09504–22011
F01257
Matchmarks
F03768
Hold
SA2352
SA–74
–
SUSPENSION AND AXLE
REAR DIFFERENTIAL CARRIER
LEXUS RX300 (RM785E)
(e)
Align the matchmarks on the bearing cap and differential
carrier, and install the 2 bearing caps and 4 bolts.
Torque: 79 N·m (800 kgf·cm, 58 ft·lbf)
(f)
Recheck the ring gear backlash.
Backlash: 0.13 – 0.18 mm (0.0051 – 0.0071 in.)
If it is not within the specification, adjust it by either increasing
or decreasing the washers thickness on both sides by equal
amount.
HINT:
The backlash will change by about 0.02 mm (0.0008 in.) corre-
sponding to 0.03 mm (0.0012 in.) change in the plate washer
thickness.
Washer thickness
Thickness mm (in.)
Thickness mm (in.)
Thickness mm (in.)
2.21 – 2.23 (0.0870 – 0.0878)
2.57 – 2.59 (0.1012 – 0.1020)
2.93 – 2.95 (0.1154 – 0.1161)
2.24 – 2.26 (0.0882 – 0.0890)
2.60 – 2.62 (0.1024 – 0.1031)
2.96 – 2.98 (0.1165 – 0.1173)
2.27 – 2.29 (0.0894 – 0.0902)
2.63 – 2.65 (0.1035 – 0.1043)
2.99 – 3.01 (0.1177 – 0.1185)
2.30 – 2.32 (0.0906 – 0.0913)
2.66 – 2.68 (0.1047 – 0.1055)
3.02 – 3.04 (0.1189 – 0.1197)
2.33 – 2.35 (0.0917 – 0.0925)
2.69 – 2.71 (0.1059 – 0.1067)
3.05 – 3.07 (0.1201 – 0.1209)
2.36 –2.38 (0.0929 – 0.0937)
2.72 – 2.74 (0.1071 – 0.1079)
3.08 – 3.10 (0.1213 – 0.1220)
2.39 – 2.41 (0.0941 – 0.0949)
2.75 – 2.77 (0.1083 – 0.1091)
3.11 – 3.13 (0.1224 – 0.1232)
2.42 – 2.44 (0.0953 – 0.0961)
2.78 – 2.80 (0.1094 – 0.1102)
3.14 – 3.16 (0.1236 – 0.1244)
2.45 – 2.47 (0.0965 – 0.0972)
2.81 – 2.83 (0.1106 – 0.1114)
3.17 – 3.19 (0.1248 – 0.1256)
2.48 – 2.50 (0.0976 – 0.0984)
2.84 – 2.86 (0.1118 – 0.1126)
3.20 – 3.22 (0.1260 – 0.1268)
2.51 – 2.53 (0.0988 – 0.0996)
2.87 – 2.89 (0.1130 – 0.1138)
–
2.54 – 2.56 (0.1000 – 0.1008)
2.90 – 2.92 (0.1142 – 0.1150)
–
11.
MEASURE TOTAL PRELOAD
Using a torque wrench, measure the preload.
Total preload (at starting):
Drive pinion preload plus
0.3 – 0.5 N·m (3 – 5 kgf·cm, 2.6 – 4.3 in.·lbf)
F01259
SA1653
Proper Contact
Heel Contact
Toe Contact
Select an adjusting washer that will bring the
drive pinion closer to the ring gear.
Face Contact
Flank Contact
Select an adjusting washer that will shift
the drive pinion away from the ring gear.
SA1586
Plate Washer
–
SUSPENSION AND AXLE
REAR DIFFERENTIAL CARRIER
SA–75
LEXUS RX300 (RM785E)
12.
INSPECT TOOTH CONTACT BETWEEN RING GEAR
AND DRIVE PINION
(a)
Coat 3 or 4 teeth at 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.
If the teeth are not contacting properly, use the following table
to select a proper washer for correction.
Washer thickness
Thickness mm (in.)
Thickness mm (in.)
Thickness mm (in.)
2.26 – 2.28 (0.0890 – 0.0898)
2.41 – 2.43 (0.0949 – 0.0957)
2.56 – 2.58 (0.1008 – 0.1016)
2.29 – 2.31 (0.0902 – 0.0909)
2.44 – 2.46 (0.0961 – 0.0969)
2.59 – 2.61 (0.1020 – 0.1028)
2.32 – 2.34 (0.0913 – 0.0921)
2.47 – 2.49 (0.0972 – 0.0980)
2.62 – 2.64 (0.1031 – 0.1039)
2.35 –2.37 (0.0925 – 0.0933)
2.50 – 2.52 (0.0984 – 0.0992)
2.65 – 2.67 (0.1043 – 0.1051)
2.38 – 2.40 (0.0937 – 0.0945)
2.53 – 2.55 (0.0996 – 0.1004)
2.68 – 2.70 (0.1055 – 0.1063)
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