2011 INFINITI QX56 differential

DLN-4
Commercial Service Tools .....................................125
SYMPTOM DIAGNOSIS ............................126
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
126
NVH Troubleshooting Chart ................................ ..126
PERIODIC MAINTENANCE ..................... ..127
FRONT PROPELLER SHAFT ........................ .127
Inspection ............................................................ ..127
REMOVAL AND INSTALLATION ..............128
FRONT PROPELLER SHAFT ........................ .128
Exploded View ..................................................... ..128
Removal and Installation .......................................129
Disassembly and Assembly ...................................129
Inspection ..............................................................131
SERVICE DATA AND SPECIFICATIONS
(SDS) .............. ............................................
133
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... .
133
General Specification .......................................... ..133
Propeller Shaft Runout ..........................................133
Journal Axial Play ..................................................133
REAR PROPELLER SHAFT: 2F P26
SYMPTOM DIAGNOSIS .. ..........................
134
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
134
NVH Troubleshooting Chart ................................ ..134
PERIODIC MAINTENANCE ..................... ..135
REAR PROPELLER SHAFT .......................... .135
Inspection ............................................................ ..135
REMOVAL AND INSTALLATION ..............136
REAR PROPELLER SHAFT .......................... .136
Exploded View ..................................................... ..136
Removal and Installation .......................................137
Disassembly and Assembly ...................................137
Inspection ..............................................................139
SERVICE DATA AND SPECIFICATIONS
(SDS) .............. ............................................
140
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... .
140
General Specification .......................................... ..140
Propeller Shaft Runout ..........................................140
Journal Axial Play ..................................................140
REAR PROPELLER SHAFT: 2S1410
SYMPTOM DIAGNOSIS .. ..........................
141
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ..
141
NVH Troubleshooting Chart ................................. .141
PERIODIC MAINTENANCE ......................142
REAR PROPELLER SHAFT .......................... ..142
Inspection ............................................................. .142
REMOVAL AND INSTALLATION .............143
REAR PROPELLER SHAFT .......................... ..143
Exploded View ..................................................... .143
Removal and Installation .......................................144
Disassembly and Assembly ..................................144
Inspection ..............................................................146
SERVICE DATA AND SPECIFICATIONS
(SDS) ........ .................................................
147
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
147
General Specification ........................................... .147
Propeller Shaft Runout ..........................................147
Journal Axial Play .................................................147
FRONT FINAL DRIVE: R180A
PRECAUTION ............... ............................
148
PRECAUTIONS .............................................. ..148
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect ................................ .
148
Precaution for Servicing Front Final Drive ............148
PREPARATION .........................................149
PREPARATION .............................................. ..149
Special Service Tool ............................................ .149
Commercial Service Tool ......................................151
SYSTEM DESCRIPTION ..........................153
STRUCTURE AND OPERATION ................... ..153
Sectional View ..................................................... .153
SYMPTOM DIAGNOSIS ...........................154
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ..
154
NVH Troubleshooting Chart ................................. .154
PERIODIC MAINTENANCE ......................155
FRONT DIFFERENTIAL GEAR OIL .............. ..155
Inspection ............................................................. .155
Draining .................................................................155
Refilling .................................................................155
REMOVAL AND INSTALLATION .............156
FRONT OIL SEAL .......................................... ..156
Exploded View ..................................................... .156
Revision: 2010 May2011 QX56

DLN-5
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Removal and Installation .....................................
..
156
SIDE OIL SEAL ................................................160
Exploded View .................................................... ..160
Removal and Installation .......................................160
UNIT REMOVAL AND INSTALLATION ....162
FRONT FINAL DRIVE ASSEMBLY ............... ..162
Exploded View .................................................... ..162
Removal and Installation .......................................162
UNIT DISASSEMBLY AND ASSEMBLY ..164
SIDE SHAFT ................................................... ..164
Exploded View .................................................... ..164
Disassembly ..........................................................165
Assembly ...............................................................166
Inspection ..............................................................166
DIFFERENTIAL ASSEMBLY ...........................167
Exploded View .................................................... ..167
Disassembly ..........................................................168
Assembly ...............................................................169
Adjustment ............................................................171
Inspection ..............................................................174
DRIVE PINION ..................................................176
Exploded View .................................................... ..176
Disassembly ..........................................................177
Assembly ...............................................................179
Adjustment ............................................................181
Inspection ..............................................................184
SERVICE DATA AND SPECIFICATIONS
(SDS) ......... ................................. ................
185
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
185
General Specifications ........................................ ..185
Drive Gear Runout ................................................185
Preload Torque .....................................................185
Backlash ................................................................185
Companion Flange Runout ...................................185
REAR FINAL DRIVE: R230
PRECAUTION ................ ............................
186
PRECAUTIONS .............................................. ..186
Service Notice or Precautions for Rear Final Drive ..186
PREPARATION .........................................187
PREPARATION .............................................. ..187
Special Service Tool ........................................... ..187
Commercial Service Tool ......................................189
SYSTEM DESCRIPTION ...........................191
STRUCTURE AND OPERATION ...................191
Sectional View ..................................................... ..191
SYMPTOM DIAGNOSIS ............................192
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING .........................
192
NVH Troubleshooting Chart ................................ ..192
PERIODIC MAINTENANCE ......................193
REAR DIFFERENTIAL GEAR OIL .................193
Inspection ............................................................ ..193
Draining .................................................................193
Refilling ..................................................................193
REMOVAL AND INSTALLATION .............194
FRONT OIL SEAL ...........................................194
Exploded View ..................................................... ..194
Removal and Installation .......................................194
SIDE OIL SEAL ...............................................199
Exploded View .......................................................199
Removal and Installation .......................................199
UNIT REMOVAL AND INSTALLATION ....201
REAR FINAL DRIVE .......................................201
Exploded View ..................................................... ..201
Removal and Installation .......................................201
UNIT DISASSEMBLY AND ASSEMBLY ..203
DIFFERENTIAL ASSEMBLY ..........................203
Exploded View ..................................................... ..203
Disassembly ..........................................................204
Assembly ...............................................................206
Adjustment .............................................................210
Inspection ..............................................................215
DRIVE PINION ................................................216
Exploded View .......................................................216
Disassembly ..........................................................217
Assembly ...............................................................218
Adjustment .............................................................220
Inspection ..............................................................220
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... ...........................................
222
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
222
General Specification .......................................... ..222
Drive Gear Runout .................................................222
Side Gear Clearance .............................................222
Preload Torque ......................................................222
Backlash ................................................................222
Companion Flange Runout ....................................222
Revision: 2010 May2011 QX56

DLN-126
< SYMPTOM DIAGNOSIS >[FRONT PROPELLER SHAFT: 2F P15]
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000006222354
Use the chart below to help you find the cause of the symptom. If necessa ry, repair or replace these parts.
×: ApplicableReference
DLN-127, "
Inspection
"—
—
—
—
DLN-127, "
Inspection
"
DLN-127, "
Inspection
"
NVH of FRONT FINAL DRI VE in this section.
NVH of REAR FINAL DRI VE in this section.
NVH in FAX, RAX, FSU and RSU section.
NVH in WT section.
NVH in WT section.
NVH in FAX and RAX section.
NVH in BR section.
NVH in ST section.
Possible cause an d SUSPECTED PARTS
Uneven rotating torque
Center bearing improper installation
Excessive center bearing axial end play
Center bearing mounting (insulator) cracks, damage or deterioration
Excessive joint angle
Rotation imbalance
Excessive runout
DIFFERENTIAL
AXLE AND SUSPENSION
TIRE
ROAD WHEEL
DRIVE SHAFT
BRAKE
STEERING
Symptom Noise
××××××××××××××
Shake × × ××××××
Vibration ××××××× ×× × ×
Revision: 2010 May2011 QX56

DLN-134
< SYMPTOM DIAGNOSIS >[REAR PROPELLER SHAFT: 2F P26]
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000006222363
Use the chart below to help you find the cause of the symptom. If necessa ry, repair or replace these parts.
×: ApplicableReference
DLN-142, "
Inspection
"—
—
—
—
DLN-142, "
Inspection
"
DLN-142, "
Inspection
"
NVH of FRONT FINAL DRI VE in this section.
NVH of REAR FINAL DRI VE in this section.
NVH in FAX, RAX, FSU and RSU section.
NVH in WT section.
NVH in WT section.
NVH in FAX and RAX section.
NVH in BR section.
NVH in ST section.
Possible cause an d SUSPECTED PARTS
Uneven rotating torque
Center bearing improper installation
Excessive center bearing axial end play
Center bearing mounting (insulator) cracks, damage or deterioration
Excessive joint angle
Rotation imbalance
Excessive runout
DIFFERENTIAL
AXLE AND SUSPENSION
TIRE
ROAD WHEEL
DRIVE SHAFT
BRAKE
STEERING
Symptom Noise
××××××××××××××
Shake × × ××××××
Vibration ××××××× ×× × ×
Revision: 2010 May2011 QX56

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGDLN-141
< SYMPTOM DIAGNOSIS > [REAR PROPELLER SHAFT: 2S1410]
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SYMPTOM DIAGNOSIS
NOISE, VIBRATION, AND HARSHNESS (N VH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000006222436
Use the chart below to help you find the cause of t he symptom. If necessary, repair or replace these parts.
×: Applicable
Reference
DLN-142, "
Inspection
"—
—
—
—
DLN-142, "
Inspection
"
DLN-142, "
Inspection
"
NVH of FRONT FINAL DRI VE in this section.
NVH of REAR FINAL DRI VE in this section.
NVH in RAX and RSU section.
NVH in WT section.
NVH in WT section.
NVH in RAX section.
NVH in BR section.
NVH in ST section.
Possible cause and SUSPECTED PARTS
Uneven rotating torque
Center bearing improper installation
Excessive center bearing axial end play
Center bearing mounting (insulator) cracks, damage or deterioration
Excessive joint angle
Rotation imbalance
Excessive runout
DIFFERENTIAL
AXLE AND SUSPENSION
TIRE
ROAD WHEEL
DRIVE SHAFT
BRAKE
STEERING
Symptom Noise
××××××××××××××
Shake × × ××××××
Vibration ××××××× ×× × ×
Revision: 2010 May2011 QX56

DLN-148
< PRECAUTION >[FRONT FINAL DRIVE: R180A]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution Necessary for Steering W
heel Rotation after Battery Disconnect
INFOID:0000000006222372
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect bot h battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the bat tery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wi ll remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
5. When the repair work is completed, re-connect bot h battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Precaution for Servicing Front Final DriveINFOID:0000000006222373
 Before starting diagnosis of the vehicle, understand the symptoms well. Perform correct and systematic
operations.
 Check for the correct installation status prior to re moval or disassembly. When matching marks are required,
be certain they do not interfere with the f unction of the parts they are applied to.
 Overhaul should be done in a clean work area, a dust proof area is recommended.
 Before disassembly, completely remove sand and mud from the exterior of the unit, preventing them from
entering into the unit during disassembly or assembly.
 Always use shop paper for cleaning the inside of components.
 Avoid using cotton gloves or a shop cloth to prevent the entering of lint.
 Check appearance of the disassembled parts for dam age, deformation, and abnormal wear. Replace them
with new ones if necessary.
 Gaskets, seals and O-rings should be replaced any time the unit is disassembled.
 Clean and flush the parts sufficiently and blow them dry.
 Be careful not to damage sliding surfaces and mating surfaces.
 When applying sealant, remove the old sealant from the mating surface; then remove any moisture, oil, and
foreign materials from the application and mating surfaces.
 In principle, tighten nuts or bolts gradually in severa l steps working diagonally from inside to outside. If a
tightening sequence is specified, observe it.
 During assembly, observe the specified tightening torque.
 Add new differential gear oil, petroleum jelly, or multi-purpose grease, as specified.
Revision: 2010 May2011 QX56

DLN-150
< PREPARATION >[FRONT FINAL DRIVE: R180A]
PREPARATION
ST3306S001
(J-22888-D)
Differential side bearing puller set
1: ST33051001
(J-22888-20)
Puller
2: ST33061000 (J-8107-2)
Base
a: 28.5 mm (1.122 in) dia.
b: 38 mm (1.50 in) dia. Removing and installing side bearing inner
race
KV10112100
(BT-8653-A)
Angle wrench Tightening the drive gear mounting bolts
ST33230000
(J-35867)
Drift
a: 51 mm (2.01 in) dia.
b: 41 mm (1.61 in) dia.
c: 28 mm (1.10 in) dia. Installing side bearing inner race
ST30611000
(J-25742-1)
Drift bar Installing pinion rear bearing outer race
(Use with ST30613000)
ST30613000
(J-25742-3)
Drift
a: 72 mm (2.83 in) dia.
b: 48 mm (1.89 in) dia. Installing pinion rear bearing outer race
KV38100200
(J-26233)
Drift
a: 65 mm (2.56 in) dia.
b: 49 mm (1.93 in) dia. Installing pinion front bearing outer race
Tool number
(Kent-Moore No.)
Tool name
Description
NT072
ZZA0120D
ZZA1046D
S-NT090
ZZA1000D
ZZA1143D
Revision: 2010 May2011 QX56

PREPARATIONDLN-151
< PREPARATION > [FRONT FINAL DRIVE: R180A]
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Commercial Service ToolINFOID:0000000006222375
ST30901000
(J-26010-01)
Drift
a: 79 mm (3.11 in) dia.
b: 45 mm (1.77 in) dia.
c: 35.2 mm (1.386 in) dia. Installing drive pinion rear bearing inner race
ST33200000
(J-26082)
Drift
a: 60 mm (2.36 in) dia.
b: 44.5 mm (1.752 in) dia. Installing drive pinion front bearing inner race
—
(J-34309)
Differential shim selector tool Adjusting bearing preload and pinion gear
height
—
(J-25269-18)
Side bearing disc (2 Req ′d) Selecting pinion height adjusting washer
Tool number
(Kent-Moore No.)
Tool name
Description
ZZA0978D
ZZA1002D
NT134
NT135
Tool name
Description
Power tool Loosening bolts and nuts
Flange wrench Removing and installing drive pinion lock nut
PBIC0190E
NT035
Revision: 2010 May2011 QX56