differential INFINITI QX56 2009 Factory Owner's Guide

DLN-238
< PREPARATION >[REAR FINAL DRIVE: R230]
PREPARATION
PREPARATION
PREPARATION
Special Service ToolINFOID:0000000005877759
The actual shapes of Kent-Moore tool
s may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name Description
HT72400000
(—)
Slide hammer Removing differential case assembly
K V 1 0 1111 0 0
(J-37228)
Seal cutter Removing carrier cover
KV10112100
(BT-8653-A)
Angle wrench Tightening bolts for drive gear
KV38100200
(J-26233)
Drift Installing side oil seal
a: 65 mm (2.56 in) dia.
b: 49 mm (1.93 in) dia.
KV38100800
(J-25604-01)
Attachment Securing unit assembly
a: 541 mm (21.30 in)
b: 200 mm (7.87 in)
KV381054S0
(J-34286)
Puller Removing front oil seal
S-NT125
S-NT046
NT014
ZZA1143D
SDIA0267E
ZZA0601D
Revision: December 20092009 QX56

DLN-240
< PREPARATION >[REAR FINAL DRIVE: R230]
PREPARATION
Commercial Service Tool
INFOID:0000000004193551
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
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.
ST33081000
(—)
Adapter Install differential carrier side bearings
a: 43 mm (1.69 in) dia.
b: 33.5 mm (1.319 in) dia.
ST35325000
(—)
Drift bar Installing drive pinion front and rear bearing
races
ST36230000
(J-25840-A)
Sliding hammer Removing side flange
—
(J-8129)
Spring gauge Measuring turning torque
Tool number
(Kent-Moore No.)
Tool name
Description
NT124
NT072
NT431
ZZA1140D
ZZA0803D
NT127
Revision: December 20092009 QX56

DESCRIPTIONDLN-243
< SYMPTOM DIAGNOSIS > [REAR FINAL DRIVE: R230]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
DESCRIPTION
Cross-Sectional ViewINFOID:0000000004193553
1. Side flange 2. Pinion mate gear 3. Drive gear
4. Pinion mate shaft 5. Differential case 6. 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: December 20092009 QX56

DLN-244
< ON-VEHICLE MAINTENANCE >[REAR FINAL DRIVE: R230]
DIFFERENTIAL GEAR OIL
ON-VEHICLE MAINTENANCE
DIFFERENTIAL GEAR OIL
Changing Differential Gear OilINFOID:0000000004193554
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-253,
"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-253,
"Disassembly and Assembly".
CAUTION:
Do not reuse gasket.
Checking Differential Gear OilINFOID:0000000004193555
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-253,
"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: December 20092009 QX56

DLN-246
< 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 fron t oil seal when installing.
 Apply multi-purpose grease to the lips of the new front oil
seal.
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 suitable 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 th e 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-253, "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 sp acer and tighten it again to adjust. Refer to
DLN-253, "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-244, "Checking Differential Gear
Oil".
Tool number : ST15310000 ( — )
PDIA0565E
Tool number B: ST3127S000 (J-25765-A)
Total preload torque: Refer to
DLN-253, "Disassem-
bly and Assembly".
WDIA0380E
Revision: December 20092009 QX56

DLN-248
< ON-VEHICLE REPAIR >[REAR FINAL DRIVE: R230]
SIDE OIL SEAL
Check the differential gear oil level
after installation. Refer to DLN-244, "Checking Differential Gear
Oil".
Revision: December 20092009 QX56

CARRIER COVERDLN-249
< ON-VEHICLE REPAIR > [REAR FINAL DRIVE: R230]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
CARRIER COVER
Removal and InstallationINFOID:0000000004193558
REMOVAL
1. Remove the rear final drive assembly. Refer to DLN-250, "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-249, "Removal and Installa-
tion".
3. Install the rear final drive assembly. Refer to DLN-250, "Removal
and Installation".
CAUTION:
Fill the rear final drive assembly with reco mmended differential gear oil. Refer to DLN-244,
"Checking Differential Gear Oil".
Tool number : KV10111100 (J-37228)
WDIA0123E
WDIA0282E
Revision: December 20092009 QX56

DLN-250
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
REMOVAL AND INSTALLATION
REAR FINAL DRIVE
Removal and InstallationINFOID:0000000005877761
REMOVAL
1. Remove the spare tire.
2. Drain the differential gear oil. Refer to
DLN-244, "Changing Differential Gear Oil"
.
3. Remove the rear stabilizer bar. Refer to RSU-23, "Removal and Installation"
.
4. Remove the rear propeller shaft. Refer to DLN-196, "Removal and Installation"
.
5. Remove the rear drive shafts from the rear final drive assembly and support them using suitable wire. Refer to RAX-9, "Removal
and Installation".
6. Disconnect the breather hose from the rear final drive assembly.
1. Rear final drive assembly 2. Upper stopper 3. Washer
4. Lower stopper Vehicle front
WDIA0383E
LDIA0164E
Revision: December 20092009 QX56

DLN-252
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
REAR FINAL DRIVE BREATHER
 Fill the rear final drive assembl
y with differential gear oil after installation. Refer to DLN-244, "Check-
ing Differential Gear Oil".
ALDIA0210GB
1. Rear final drive breather hose connector 2. Plastic clip 3. Rear final drive breather tube
4. Rear final drive assembly 5. Rear suspension member 6. Rear final drive breather hose
7. Parking brake cable 8. Exhaust pipe 9. Frame (LH)
10. Rear final drive breather hose frame
connector A. Close-up view Front
Revision: December 20092009 QX56

DLN-254
< 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-244, "Changing Differential
Gear Oil".
 Remove and install the carrier cover as neces sary for inspection and adjustment. Refer to DLN-249,
"Removal and Installation".
Total Preload Torque
1. Remove the side flanges if necessary. Refer to DLN-247, "Removal and Installation".
CAUTION:
The side flanges must removed in or der 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 flange 3. Front oil seal
4. Drive pinion front bearing 5. Collapsible spacer 6. Drive pinion rear bearing
7. Drive pinion height adjusting washer 8. Drive pinion 9. Gear carrier
10. Drive gear 11. Pinion mate shaft 12. Lock pin
13. Pinion mate gear 14. Pinion mate thrust washer 15. Side gear
16. Side gear thrust washer 17. Differential case 18. Side bearing
19. Side bearing adjusting washer 20. Bearing cap 21. Carrier cover
22. Filler plug 23. Drain plug 24. Side oil seal
Tool number : ST3127S000 (J-25765-A)
Total preload torque
: Refer to DLN-270, "Inspection and Adjustment"
SPD884
If the total preload torque is greater than specification
On drive pinion bearings: R eplace the collapsible spacer.
On side bearings: Use thinner side b earing adjusting washers by the same
amount on each side. Refer to DLN-270, "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-270, "Inspection and Ad-
justment".
Revision: December 20092009 QX56