2006 INFINITI QX56 differential

GI-52
TERMINOLOGY
Revision: November 20092006 QX56
Exhaust gas recirculation control-BPT
valveEGRC-BPT valve
BPT valve
Exhaust gas recirculation control-solenoid
valve EGRC-solenoid valve
EGR control solenoid valve
Exhaust gas recirculation temperature sen-
sor EGRT sensor Exhaust gas temperature sensor
EGR temperature sensor
Flash electrically erasable programmable
read only memory FEEPROM
***
Flash erasable programmable read only
memory FEPROM
***
Flexible fuel sensor FFS ***
Flexible fuel system FF system ***
Fuel pressure regulator *** Pressure regulator
Fuel pressure regulator control solenoid
valve ***
PRVR control solenoid valve
Fuel trim FT ***
Heated Oxygen sensor HO2S Exhaust gas sensor
Idle air control system IAC system Idle speed control
Idle air control valve-air regulator IACV-air regulator Air regulator
Idle air control valve-auxiliary air control
valve IACV-AAC valve
Auxiliary air control (AAC) valve
Idle air control valve-FICD solenoid valve IACV-FICD solenoid valve FICD solenoid valve
Idle air control valve-idle up control sole-
noid valve IACV-idle up control solenoid valve Idle up control solenoid valve
Idle speed control-FI pot ISC-FI pot FI pot
Idle speed control system ISC system ***
Ignition control IC ***
Ignition control module ICM ***
Indirect fuel injection system IFI system ***
Intake air IA Air
Intake air temperature sensor IAT sensor Air temperature sensor
Knock *** Detonation
Knock sensor KS Detonation sensor
Malfunction indicator lamp MIL Check engine light
Manifold absolute pressure MAP ***
Manifold absolute pressure sensor MAPS ***
Manifold differential pressure MDP ***
Manifold differential pressure sensor MDPS ***
Manifold surface temperature MST ***
Manifold surface temperature sensor MSTS ***
Manifold vacuum zone MVZ ***
Manifold vacuum zone sensor MVZS ***
Mass air flow sensor MAFS Air flow meter
Mixture control solenoid valve MC solenoid valve Air-fuel ratio control solenoid valve
Multiport fuel injection System MFI system Fuel injection control
NEW TERM
NEW ACRONYM /
ABBREVIATION OLD TERM

IDX-3
A
C
D E
F
G H
I
J
K L
B
IDX
ALPHABETICAL INDEX
Brake inspection ................................................
MA-28
Brake lines and cables inspection ..................... MA-28
Brake master cylinder ....................................... BR-15
Brake switch ...................................... EC-511, EC-523
BRK/SW - Wiring diagram ............................... EC-524
Bulb specifications ........................................... LT-175
Bumper, front ...................................................... EI-13
Bumper, rear ....................................................... EI-15
C
Cabin air filter .................................................... MA-21
Camshaft ........................................................... EM-46
Camshaft inspection .......................................... EM-50
Camshaft position sensor (PHASE) ................ EC-347
CAN - Wiring diagram EC-152, AT-96, AT-97, LAN-28,
LAN-39
, LAN-57, LAN-79, LAN-98
CAN communication EC-31, EC-151, EC-154, TF-113,
RSU-6
Canister-See EVAP canister ............................. EC-35
Center case (Transfer) ....................... TF-154, TF-167
CHARGE - Wiring diagram ............................... SC-18
Charging system ............................................... SC-17
Chassis and body maintenance ........................ MA-21
Chassis and body maintenanceSchedule 1 ........ MA-8
Chassis and body maintenanceSchedule 2 ...... MA-10
CHIME - Wiring diagram ..................................... DI-46
Circuit breaker ................................................... PG-17
Clock ................................................................... DI-71
CLOCK - Wiring diagram .................................... DI-71
Closed loop control ............................. EC-25, EC-470
Closed loop control (Bank 1) ........................... EC-470
Closed loop control (Bank 2) ........................... EC-470
Clutch drum (Transfer) ....................... TF-154, TF-167
Clutch pressure switch (Transfer) ...... TF-154, TF-167
Coil spring (front) ............................................. FSU-10
Collision diagnosis .......................................... SRS-60
Combination lamp, front, removal and installation . LT-
31
Combination lamp, rear, removal and installation .. LT-
125
Combination meter ................................................ DI-5
Combination switch .......................................... LT-100
COMBSW - Wiring diagram ............................. LT-100
COMM - Wiring diagram ................................... AV-97
COMPAS - Wiring diagram ................................. DI-27
Compass ............................................................. DI-26
Component Location (auto A/C) ...................... ATC-40
Compressor clutch removal and installation . ATC-176
Compressor mounting ................................... ATC-175
Compressor precaution ................................... ATC-11
Compressor special service tool ..................... ATC-14
Condenser ..................................................... ATC-182
Connecting rod .................................................. EM-96
Connecting rod bearing clearance .................... EM-96
Connecting rod bushing clearance .................... EM-96
Console box - See Instrument panel ................... IP-10
CONSULT for VDC ......................................... BRC-28
CONSULT-II for engine ................................... EC-114
Control units (terminal arrangement) ................. PG-71
Control valve (A/T) ............................................. AT-36
Control valve (Transfer) ...................... TF-154, TF-167
Converter housing installation ............ AT-245, AT-249
COOL/F - Wiring diagram ................................ EC-476
Coolant mixture ratio ......................................... MA-12
Coolant replacement ............................ CO-10, MA-13
Cooling circuit (engine) ........................................ CO-8
Cooling fan ........................................................ CO-17
Cooling fan control ........................................... EC-473
Cooling fan motor ............................................ EC-482
Cooling unit (A/C evaporator) ....... ATC-153, ATC-184
Corrosion protection ......................................... BL-165
Crankcase ventilation system - See Positive crankcase
ventilation .......................................................... EC-45
Crankshaft ......................................................... EM-79
Crankshaft position sensor (POS) ................... EC-340
Crash zone sensor .......................................... SRS-55
Cylinder block .................................................... EM-78
Cylinder block boring ......................................... EM-99
D
D/LOCK - Wiring diagram ................................... BL-19
Data link connector for Consult ......... EC-116, EC-128
Daytime light system .......................................... LT-33
Daytime running light - See Daytime light system .. LT-
33
DEF - Wiring diagram ....................................... GW-77
Diagnosis sensor unit ...................................... SRS-58
Diagnostic trouble code (DTC) for OBD system . EC-8,
EC-52
Diagnostic trouble code (DTC) inspection priority chart
EC-89
Differential carrier assembly ............................ RFD-15
Differential gear oil replacement ........................ MA-26
Dimensions ......................................................... GI-50
Direct clutch solenoid valve ................ AT-147, AT-149
Display and amp.assembly .............................. ATC-61
Display Control Unit ........................................... AV-86
Display Unit ....................................................... AV-86
Dome light - See Interior lamp .......................... LT-134
Door glass .......................................... GW-65, GW-68
Door lock .......................................................... BL-131
Door mirror lamp ............................................... LT-134
Door trim .............................................................. EI-32
Door, front ........................................... BL-128, GW-65
Door, rear ........................................... BL-128, GW-68
Drive belt ........................................................... EM-13
Drive chain (Transfer) ......................... TF-149, TF-176
Drive pinion diff. inspection .............................. RFD-18
Drive shaft (rear) ................................................ RAX-7
Driver air bag ................................................... SRS-46
DTC work support ............................................ EC-124
DTRL - Wiring diagram ....................................... LT-37
Duct and grilles .............................................. ATC-166
DVD - Wiring Diagram ....................................... AV-78
DVD Entertainment System ............................... AV-75
DVD Player ........................................................ AV-76

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPR-3
CE F
G H
I
J
K L
M A
B
PR
Revision: November 2009 2006 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS001W4
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
PR-4
(front)
PR-8 (rear)
PR-4 (front)
PR-8 (rear)
PR-4 (front)
PR-8 (rear)
FFD-6, "
NVH Troubleshooting Chart
"
RFD-7, "
NVH Troubleshooting Chart
"
FAX-4, "
NVH Troubleshooting Chart
"
RAX-4, "
NVH Troubleshooting Chart
"
FSU-4, "
NVH Troubleshooting Chart
"
RSU-5, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
PR-3, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and suspected parts
Uneven rotation torque
Rotation imbalance
Excessive run out
Differential
Axle
Suspension
Tires
Road wheel
Drive shaft
Brakes
Steering
Symptom Noise
×××××××××××
Shake ×××××××
Vibration ××××××××

RAX-4
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: November 20092006 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS001XM
Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
—
RAX-8—
RAX-5—
RFD-7, "
NVH Troubleshooting Chart
"
FAX-4, "
NVH Troubleshooting Chart
" (FAX), FSU-4, "
NVH Troubleshooting Chart
" (FSU)
RSU-5, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
PR-3, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
DIFFERENTIAL
FRONT AXLE AND FRONT SUSPENSION
REAR SUSPENSION
TIRES
ROAD WHEEL
PROPELLER SHAFT
BRAKES
STEERING
Symptom Noise
×× ×× ×× ×××××
Shake × × ×× × ×××××
Vibration ×× ×× × × × ×
Shimmy ×× ×××××
Shudder × × ×× ××
Poor quality ride or handling ×× ×× ×× ×

RFD-1
REAR FINAL DRIVE
D DRIVELINE/AXLE
CONTENTS
CE F
G H
I
J
K L
M
SECTION
A
B
RFD
Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 2
Precautions for Servicing Rear Final Drive ......... ..... 2
PREPARATION ...................................................... ..... 3
Special Service Tools .......................................... ..... 3
Commercial Service Tools ................................... ..... 5
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... ..... 7
NVH Troubleshooting Chart ................................ ..... 7
DIFFERENTIAL GEAR OIL ................................... ..... 8
Changing Differential Gear Oil ............................ ..... 8
DRAINING ........................................................ ..... 8
FILLING ............................................................ ..... 8
Checking Differential Gear Oil ............................. ..... 8
OIL LEAKAGE AND OIL LEVEL ...................... ..... 8
FRONT OIL SEAL ................................................. ..... 9
Removal and Installation ..................................... ..... 9
REMOVAL ........................................................ ..... 9
INSTALLATION ................................................ ..... 9
SIDE OIL SEAL ..................................................... ....11
Removal and Installation ..................................... .... 11
REMOVAL ........................................................ .... 11
INSTALLATION ................................................ .... 11CARRIER COVER .................................................
... 12
Removal and Installation ..................................... ... 12
REMOVAL ........................................................ ... 12
INSTALLATION ................................................ ... 12
REAR FINAL DRIVE ASSEMBLY ......................... ... 13
Removal and Installation ..................................... ... 13
REMOVAL ........................................................ ... 13
INSTALLATION ................................................ ... 14
Disassembly and Assembly ................................. ... 15
COMPONENTS ................................................ ... 15
ASSEMBLY INSPECTION AND ADJUSTMENT ... 16
DISASSEMBLY ................................................ ... 19
INSPECTION AFTER DISASSEMBLY ............. ... 23
ADJUSTING AND SELECTING WASHERS .... ... 24
ASSEMBLY ...................................................... ... 26
SERVICE DATA AND SPECIFICATIONS (SDS) ... ... 32
General Specifications ......................................... ... 32
Inspection and Adjustment .................................. ... 32
DRIVE GEAR RUNOUT ................................... ... 32
SIDE GEAR CLEARANCE ............................... ... 32
PRELOAD TORQUE ........................................... 32
BACKLASH ...................................................... ... 32
COMPANION FLANGE RUNOUT .................... ... 32
SELECTIVE PARTS ......................................... ... 32

RFD-2
PRECAUTIONS
Revision: November 20092006 QX56
PRECAUTIONSPFP:00001
Precautions for Servicing Rear Final DriveEDS0044K

Before starting diagnosis of the vehicle, understand the symptoms well. Perform correct and systematic
operations.

Check for the correct installation status prior to removal or disassembly. When matching marks are
required, be certain they do not interfere with the function 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 damage, 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 several 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.

RFD-4
PREPARATION
Revision: November 20092006 QX56
KV38100800
(J-25604-01)
AttachmentSecuring unit assembly
a: 541 mm (21.30 in) dia.
b: 200 mm (7.87 in) dia.
ST3127S000
(J-25765-A)
Preload gauge
1. GG91030000
(J-25765)
Torque wrench
2. HT62940000
(—)
Socket adapter (1/2 in)
3. HT62900000
(—)
Socket adapter (3/8 in) Measuring drive pinion bearing preload torque
and total preload torque
KV10111100
(J-37228)
Seal cutter Removing carrier cover
ST3306S001
(—)
Differential side bearing puller set
1.ST33051001
(—)
Puller
2.ST33061000
(J-8107-2)
Base Removing side bearing inner race
a: 28.5 mm (1.122 in) dia.
b: 38 mm (1.50 in) dia.
ST30021000
(—)
Bearing puller Removing drive pinion rear bearing inner race
KV38100200
(J-26233)
Drift Installing side bearing inner race
a: 65 mm (2.55 in) dia.
b: 49 mm (1.92 in) dia.
Tool name
Tool number
(Kent-Moore No.)
Description
SDIA0267E
NT124
S-NT046
NT072
ZZA0700D
ZZA1143D

PREPARATIONRFD-5
CE F
G H
I
J
K L
M A
B
RFD
Revision: November 2009 2006 QX56
Commercial Service ToolsEDS0044M
ST33081000
(—)
DriftInstalling side bearing inner race
a: 43 mm (1.69 in) dia.
b: 33.5 mm (1.31 in) dia.
ST35325000
(—)
Drift Installing drive pinion front bearing outer race
(use with ST30621000)
ST30621000
(—)
Drift Installing drive pinion front bearing outer race
a: 79 mm (3.11 in) dia.
b: 59 mm (2.32 in) dia.
ST30022000
(—)
Drift Installing drive pinion rear bearing inner race
a: 110 mm (4.33 in) dia.
b: 46 mm (1.81 in) dia.
HT72400000
(—)
Slide hammer Removing differential case assembly
—
(J-8129)
Spring gauge Measuring turning torque
KV10112100
(BT-8653-A)
Angle wrench Tightening bolts for drive gear
Tool name
Tool number
(Kent-Moore No.)
Description
ZZA0810D
S-NT090
ZZA0810D
ZZA0920D
S-NT125
NT127
NT014