Page 2033 of 3419

FFD-2
PRECAUTIONS
Revision: October 20052005 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EDS003PC
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WAR NIN G:
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
PrecautionsEDS003PD
CAUTION:
Before starting diagnosis of the vehicle, understand symptoms well. Perform correct and system-
atic operations.
Check for the correct installation status prior removal or disassembly. When matching marks are
required, be sure they do not interfere with the function of the parts they are applied to.
Carry out an overhaul in a clean work place, Using a dust proof room is recommended.
Before disassembly, using steam or white gasoline, completely remove sand and mud from the
exterior the unit, preventing them from entering into the unit during disassembly or assembly.
Check appearance of the disassembled parts for damage, deformation, and abnormal wear. If a
malfunction is detected, replace it with a new one.
Normally replace lock pins, oil seals, and bearings with new ones every times they are removed.
In principle, tighten bolts or nuts gradually in several steps working diagonally from inside to out-
side. If tightening sequence is specified, observe it.
Clean and flush the parts sufficiently and blow them dry.
Be careful not to damage the sliding surfaces and mating surface.
When applying sealant, remove the old sealant from the mounting surface; then remove any mois-
ture, oil, and foreign materials from the application and mounting surfaces.
Always use shop paper for cleaning the inside of components.
Avoid using cotton gloves or a shop cloth to prevent entering of lint.
During assembly, observe the specified tightening torque, and new differential gear oil, Vaseline,
or multi-purpose grease, as specified for each vehicle, when necessary.
Page 2034 of 3419

PREPARATION
FFD-3
C
E
F
G
H
I
J
K
L
MA
B
FFD
Revision: October 20052005 QX56
PREPARATIONPFP:00002
Special Service ToolsEDS003PE
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
ST35271000
(—)
DriftInstalling drive pinion front bearing outer race.
a: 72 mm (2.83 in) dia.
b: 36 mm (1.42 in) dia.
KV38100500
(J-25273)
DriftInstalling front oil seal.
a: 80 mm (3.15 in) dia.
b: 60 mm (2.36 in) dia.
ST30021000
(—)
Puller
Removing side bearing inner race.
Removing drive pinion rear bearing inner
race.
KV38100300
(J-25523)
DriftInstalling 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
(—)
DriftInstalling drive pinion rear bearing outer race.
A: 79mm (3.11 in) dia.
B: 45 mm (1.77 in) dia.
C: 35.2 mm (1.39 in) dia.
KV40104810
(—)
DriftInstalling drive pinion front bearing outer race.
a: 68 mm (2.68 in) dia.
b: 55 mm (2.17 in) dia.
KV38102200
(—)
DriftInstalling front oil seal.
a: 90 mm (3.54 in) dia.
b: 55.3 mm (2.18 in) dia.
c: 31 mm (1.22 in) dia.
ZZA0702D
ZZA0811D
ZZA0700D
ZZA1046D
SDIA0217J
ZZA1003D
NT107
Page 2035 of 3419
FFD-4
PREPARATION
Revision: October 20052005 QX56
ST33081000
(—)
AdapterRemoving and installing side bearing inner
race.
a: 33.5 mm (1.32 in) dia.
b: 43 mm (1.69 in) dia.
KV38108300
(6958)
Spanner wrenchRemoving and installing drive pinion nut.
ST3127S000
(J-25765-A)
Preload gauge
1: GG91030000
(J-25765)
Torque wrench
2: HT62940000
(—)
Socket adapter (1/2″)
3: HT62900000
(—)
Socket adapter (3/8″)Inspecting drive pinion bearing preload and to-
tal preload
—
(C-4040)
InstallerInstalling drive pinion rear bearing inner race.
KV40105230
(—)
DriftInstalling drive pinion rear bearing outer race.
a: 92 mm(3.62 in) dia.
b: 86 mm (3.39 in) dia.
—
(C-4171)
Handle
Removing drive pinion front bearing outer
race
Removing drive pinion rear bearing outer
race Tool number
(Kent-Moore No.)
Tool nameDescription
ZZA0881D
LBIA0457E
NT124
SDIA2607E
ZZA1141D
LDIA0134E
Page 2036 of 3419
PREPARATION
FFD-5
C
E
F
G
H
I
J
K
L
MA
B
FFD
Revision: October 20052005 QX56
Commercial Service ToolsEDS003PF
—
(D-103)
RemoverRemoving drive pinion front bearing outer race
—
(C-4307)
RemoverRemoving drive pinion rear bearing outer race Tool number
(Kent-Moore No.)
Tool nameDescription
LDIA0135E
LDIA0135E
Tool nameDescription
Slide hammer
Removing front oil seal
Removing side oil seal
Power toolLoosening bolts and nuts
LDIA0133E
PBIC0190E
Page 2037 of 3419

FFD-6
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: October 20052005 QX56
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS003PG
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
FFD-15, "
Tooth Contact
"
FFD-15, "
Tooth Contact
"
FFD-15, "
Tooth Contact
"
RFD-13, "
DRIVE GEAR TO DRIVE PINION BACKLASH
"
RFD-14, "
COMPANION FLANGE RUNOUT
"
MA-21, "
CHASSIS AND BODY MAINTENANCE
"
PR-3, "
NVH Troubleshooting Chart
"
FSU-4
(FSU) and RSU-5
(RSU)
WT-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
RAX-4
(RAX) and FA X - 4
(FAX)
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Rough gear tooth
Improper gear contact
Tooth surfaces worn
Incorrect backlash
Companion flange excessive runout
Improper gear oil
PROPELLER SHAFT
SUSPENSION
TIRES
ROAD WHEEL
DRIVE AXLE
BRAKES
STEERING
Symptom Differential Noise×××××××××××××
Page 2038 of 3419
FRONT OIL SEAL
FFD-7
C
E
F
G
H
I
J
K
L
MA
B
FFD
Revision: October 20052005 QX56
FRONT OIL SEALPFP:38189
Removal and InstallationEDS003PH
REMOVAL
1. Remove front propeller shaft. Refer to PR-5, "REMOVAL" .
2. Separate the RH and LH drive shafts from the front final drive. Refer to FAX-7, "
REMOVAL" .
3. Measure the drive pinion bearing preload with front oil seal resistance using Tool.
NOTE:
Record the preload measurement.
4. Loosen drive pinion nut while holding the companion flange
using Tool.
5. Remove companion flange using a suitable puller.
6. Place a small hole in seal case, using a suitable punch or drill.
7. Remove seal using suitable tool as shown.Tool number : ST3127S000 (J-25765-A)
Tool number : KV38108300 (6958)
BDIA0001E
LDIA0129E
LDIA0130E
Page 2039 of 3419

FFD-8
FRONT OIL SEAL
Revision: October 20052005 QX56
INSTALLATION
1. Apply multi-purpose grease to cavity at sealing lips of front oil
seal. Press front oil seal into gear carrier using suitable tool.
2. Install companion flange and a new drive pinion nut. Tighten
drive pinion nut while holding the companion flange using Tool
until there is no end play.
3. Measure the drive pinion bearing preload with front oil seal
resistance using Tool.
NOTE:
Drive pinion bearing preload should equal the measurement
taken during removal plus an additional 0.56 N·m (0.06 Kg-m,
5 in-lb).
If drive pinion bearing preload is low, tighten drive pinion nut in 6.8 N·m (0.69 Kg-m, 5ft-lb) increments
until drive pinion preload is met.
CAUTION:
Never loosen the drive pinion nut to decrease drive pinion bearing preload. Do not exceed speci-
fied preload. If preload torque is exceed a new collapsible spacer must be installed. If maximum
torque is reached prior to reaching the required preload, the collapsible spacer may have been
damaged. Replace the collapsible spacer.
4. Attach the RH and LH drive shafts. Refer to FAX-8, "
INSTALLATION" .
5. Install the front propeller shaft. Refer to PR-5, "
INSTALLATION" .
BDIA0003E
Tool number : KV38108300 (6958)
Tool number : ST3127S000 (J-25765-A)
Drive pinion nut : 298 - 678 N·m (31 - 69Kg-m, 220 - 500 ft-lb)
BDIA0001E
Page 2040 of 3419
SIDE OIL SEALS
FFD-9
C
E
F
G
H
I
J
K
L
MA
B
FFD
Revision: October 20052005 QX56
SIDE OIL SEALSPFP:33142
Removal and InstallationEDS003PI
REMOVAL
1. Remove front final drive. Refer to FFD-11, "REMOVAL" .
2. Remove differential side shaft and side flange using suitable
tool.
3. Place a small hole in seal case, using suitable punch or drill.
4. Remove seal using suitable tool as shown.
5. Installation is in the reverse order of removal.
BDIA0006E
LDIA0129E
LDIA0130E