differential INFINITI QX56 2008 Factory Owner's Guide

PREPARATIONDLN-237
< PREPARATION > [REAR FINAL DRIVE: R230]
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ST3127S000
(J-25765-A)
Preload gauge
1: GG91030000 (J-25765)
Torque wrench
2: HT62940000 (—)
Socket adapter (1/2 ″)
3: HT62900000 (—)
Socket adapter (3/8 ″) Measuring drive pinion bearing preload torque
and total preload torque
K V 1 0 1111 0 0
(J-37228)
Seal cutter Removing carrier cover
ST3306S001
(—)
Differential side bearing puller set
1: ST33051001 (J-22888-20)
Puller
2: ST33061000 (J-8107-2)
Base Removing and installing side bearing inner
race
a: 28.5 mm (1.122 in) dia.
b: 38 mm (1.50 in) dia.
ST30031000
(J-22912-01)
Puller Removing drive pinion rear bearing inner race
KV40105230
(—)
Drift Installing drive pinion rear bearing outer race
a: 92 mm (3.62 in) dia.
b: 86 mm (3.39 in) dia.
c: 45 mm (1.77 in) dia.
ST30611000
(J-25742-1)
Drift bar Installing drive pinion front bearing outer race
(Use with ST30613000)
Tool number
(Kent-Moore No.)
Tool name
Description
NT124
S-NT046
NT072
ZZA0700D
PDIA0591E
S-NT090
Revision: March 2010
2008 QX56

DLN-238
< PREPARATION >[REAR FINAL DRIVE: R230]
PREPARATION
ST30613000
(J-25742-3)
Drift Installing drive pinion front bearing outer race
a: 72 mm (2.83 in) dia.
b: 48 mm (1.89 in) dia.
KV38100300
(J-25523)
Drift Installing side bearing inner race
a: 54 mm (2.13 in) dia.
b: 46 mm (1.81 in) dia.
c: 32 mm (1.26 in) dia.
ST30901000
(J-26010-01)
Drift Installing drive pinion rear bearing inner race
a: 79 mm (3.11 in) dia.
b: 45 mm (1.77 in) dia.
c: 35.2 mm (1.386 in) dia.
HT72400000
(—)
Slide hammer Removing differential case assembly
—
(J-8129)
Spring gauge Measuring turning torque
—
(J-34309)
Differential shim selector tool Adjusting drive pinion bearing preload and
drive pinion height
Tool number
(Kent-Moore No.)
Tool name
Description
ZZA1000D
ZZA1046D
ZZA0978D
S-NT125
NT127
NT134
Revision: March 2010
2008 QX56

DESCRIPTIONDLN-241
< SYMPTOM DIAGNOSIS > [REAR FINAL DRIVE: R230]
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DESCRIPTION
Cross-Sectional ViewINFOID:0000000001604456
1. Side flange 2. Pinion mate gear3. Drive gear
4. Pinion mate shaft 5. Differential case6. Side bearing
7. Drive pinion 8. Drive pinion front bearing 9. Companion flange
10. Collapsible spacer 11. Drive pinion rear bearing 12. Side gear
WDIA0119E
Revision: March 2010 2008 QX56

DLN-242
< ON-VEHICLE MAINTENANCE >[REAR FINAL DRIVE: R230]
DIFFERENTIAL GEAR OIL
ON-VEHICLE MAINTENANCE
DIFFERENTIAL GEAR OIL
Changing Differential Gear OilINFOID:0000000001604457
DRAINING
1. Stop the engine.
2. Remove the drain plug and gasket from the rear final drive
assembly to drain the differential gear oil.
3. Install the drain plug with a new gasket to the rear final drive assembly. Tighten to the specified torque. Refer to DLN-251,
"Disassembly and Assembly".
CAUTION:
Do not reuse gasket.
FILLING
1. Remove the filler plug and gasket from the rear final drive assembly.
2. Fill the rear final drive assembly with new differential gear oil until the level reaches the specified level near the filler plug hole.
3. Install the filler plug with a new gasket on it to the rear final drive assembly. Tighten to the specified torque. Refer to DLN-251,
"Disassembly and Assembly".
CAUTION:
Do not reuse gasket.
Checking Differential Gear OilINFOID:0000000001604458
OIL LEAKAGE AND OIL LEVEL
1. Make sure that differential gear oil is not leaki ng from the rear final drive assembly or around it.
2. Check the differential gear oil level from the filler plug hole as shown.
CAUTION:
Do not start engine while checki ng differential gear oil level.
3. Install the filler plug with a new gasket on it to the rear final drive assembly. Tighten to the specified torque. Refer to DLN-251,
"Disassembly and Assembly".
CAUTION:
Do not reuse gasket.
LLIA0068E
Differential gear oil
grade and capacity : Refer to MA-12, "Fluids and
Lubricants".
LLIA0068E
LLIA0068E
Revision: March 2010
2008 QX56

DLN-244
< ON-VEHICLE REPAIR >[REAR FINAL DRIVE: R230]
FRONT OIL SEAL
1. Apply multi-purpose grease to the lips of the new front oil seal.
Then drive the new front oil seal in evenly until it becomes flush
with the gear carrier using Tool.
CAUTION:
• Do not reuse front oil seal.
• Do not incline the new front oil seal when installing.
• Apply multi-purpose grease to the lips of the new front oilseal.
2. Install the companion flange to the drive pinion while aligning the matching marks.
3. Apply anti-corrosive oil to the threads of the drive pinion and the seating surface of the new drive pinion lock nut. Then adjust the
drive pinion lock nut tightening torque using Tool A, and check
the total preload torque using Tool B.
• The total preload torque should be within the total preloadtorque specification. When not replacing the collapsible
spacer, it should also be equal to the measurement taken dur-
ing removal plus an additional 0.56 N·m (0.06 Kg-m, 5 in-lb).
• If the total preload torque is low, tighten the drive pinion lock nut in 6.8 N·m (0.69 Kg-m, 5ft-lb) increments until the total pre-
load torque is met.
CAUTION:
• Do not reuse drive pinion lock nut.
• Apply anti-corrosive oil to the threads of the drive pinion and the seating surface of the new drive pinion lock nut.
• Adjust the drive pinion lock nut tightening torque to the
lower limit first. Do not exceed the drive pinion lock nut
specified torque. Refer to DLN-251, "
Disassembly and Assembly".
• Do not loosen drive pinion lock nu t to adjust the total preload torque. If the total preload torque
exceeds the specifications, replace the collapsible spacer and tighten it again to adjust. Refer to
DLN-251, "
Disassembly and Assembly".
• After adjustment, rotate drive pinion back and fo rth 2 to 3 times to check for unusual noise, rota-
tion malfunction, and other malfunctions.
4. Installation of the remaining components is in the reverse order of removal. CAUTION:
Check the differential gear oil level after installation. Refer to DLN-242, "
Checking Differential Gear
Oil".
Tool number : ST15310000 ( — )
PDIA0565E
Tool number A: KV40104000 ( — )
B: ST3127S000 (J-25765-A)
Total preload torque: Refer to DLN-268, "
Inspection
and Adjustment".
WDIA0380E
Revision: March 2010 2008 QX56

DLN-246
< ON-VEHICLE REPAIR >[REAR FINAL DRIVE: R230]
SIDE OIL SEAL
Check the differential gear oil level
after installation. Refer to DLN-242, "Checking Differential Gear
Oil".
Revision: March 2010 2008 QX56

CARRIER COVERDLN-247
< ON-VEHICLE REPAIR > [REAR FINAL DRIVE: R230]
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CARRIER COVER
Removal and InstallationINFOID:0000000001604461
REMOVAL
1. Remove the rear final drive assembly. Refer to DLN-248, "Removal and Installation".
2. Remove the carrier cover bolts and separate the carrier cover from the gear carrier using Tool.
CAUTION:
• Do not damage the mating surface.
• Do not insert flat-bladed screw driver, this will damage the
mating surface.
INSTALLATION
1. Apply a 3 mm (0.12 in) bead of sealant to the mating surface of the carrier cover as shown.
• Use Genuine Silicone RTV or equivalent. Refer to GI-15,
"Recommended Chemical Products and Sealants".
CAUTION:
Remove any old sealant adheri ng to the mating surfaces.
Also remove any moisture, oil, or foreign material adhering
to the application and mating surfaces.
2. Install the carrier cover to the gear carrier. Tighten the bolts to the specified torque. Refer to DLN-251, "
Disassembly and
Assembly".
3. Install the rear final drive assembly. Refer to DLN-248, "
Removal
and Installation".
CAUTION:
Fill the rear final drive assembly with reco mmended differential gear oil. Refer to DLN-242,
"Checking Differential Gear Oil".
Tool number : KV10111100 (J-37228)
WDIA0123E
WDIA0282E
Revision: March 2010
2008 QX56

DLN-248
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
REMOVAL AND INSTALLATION
REAR FINAL DRIVE
Removal and InstallationINFOID:0000000001604462
REMOVAL
1. Remove the spare tire.
2. Drain the differential gear oil. Refer to
DLN-242, "
Changing Differential Gear Oil".
3. Remove the rear stabilizer bar. Refer to RSU-22, "
Removal and Installation".
4. Remove the rear propeller shaft. Refer to DLN-194, "
Removal and Installation".
5. Remove the rear drive shafts from the rear final drive assembly and support them using suitable wire. Refer to RAX-10,
"Removal and Installation".
6. Disconnect the breather hose from the rear final drive assembly.
1. Rear final drive assembly 2. Upper stopper3. Washer
4. Lower stopper Vehicle front
WDIA0383E
LDIA0164E
Revision: March 2010 2008 QX56

DLN-250
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
REAR FINAL DRIVE BREATHER
• Fill the rear final drive assembly with differential gear oil
after installation. Refer to DLN-242, "Check-
ing Differential Gear Oil".
LDIA0166E
1. Breather hose 2. Plastic connector3. Rear final drive assembly
4. Metal connector 5. Paint mark
Revision: March 2010 2008 QX56

DLN-252
< DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
ASSEMBLY INSPECTION AND ADJUSTMENT
• Drain the differential gear oil before inspection and adjustment. Refer to
DLN-242, "Changing Differential
Gear Oil".
• Remove and install the carrier cover as neces sary for inspection and adjustment. Refer to DLN-247,
"Removal and Installation".
Total Preload Torque
1. Remove the side flanges if necessary. Refer to "Side Flange".
CAUTION:
The side flanges shaft must removed in order to measure total preload torque.
2. Rotate the drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
3. Rotate the drive pinion at least 20 times to check for smooth operation of the bearings.
4. Measure the total preload torque using Tool.
NOTE:
Total preload torque = Drive pinion bearing preload torque +
Side bearing preload torque
• If the measured value is out of the specification, check and adjust each part. Adjust the drive pinion
bearing preload torque first, then adjust the side bearing preload torque.
CAUTION:
Select a side bearing adjusting wash er for right and left individually.
Drive Gear Runout
1. Drive pinion lock nut 2. Companion flange3. Front oil seal
4. Drive pinion front bearing 5. Collapsible spacer6. Drive pinion rear bearing
7. Drive pinion height adjusting washer 8. Drive pinion 9. Gear carrier
10. Drive gear 11. Pinion mate shaft12. Lock pin
13. Pinion mate gear 14. Pinion mate thrust washer 15. Side gear
16. Side gear thrust washer 17. Differential case18. Side bearing
19. Side bearing adjusting washer 20. Bearing cap 21. Carrier cover
22. Filler plug 23. Drain plug24. Side oil seal
Tool number : ST3127S000 (J-25765-A)
Total preload torque:
2.05 - 4.11 N·m (0.21 - 0.42 kg-m, 19 - 36 in-lb)
SPD884
If the total preload torque is greater than specificationOn drive pinion bearings: Replace the collapsible spacer.
On side bearings: Use thinner side b earing adjusting washers by the same
amount on each side. Refer to DLN-268, "
Inspection and Adjust-
ment".
If the total preload torque is less than specification On drive pinion bearings: Tighten the drive pinion lock nut.
On side bearings: Use thicker side b earing adjusting washers by the same
amount on each side. Refer to DLN-268, "
Inspection and Ad-
justment".
Revision: March 2010 2008 QX56