INFINITI QX56 2004 Factory Service Manual

FAX-14
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: August 20072004 QX56

FFD-1
FRONT FINAL DRIVE
D DRIVELINE/AXLE
CONTENTS
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SECTION FFD
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FFD
Revision: August 20072004 QX56 PRECAUTIONS .......................................................... 2
Precautions .............................................................. 2
Precautions for Liquid Gasket .................................. 2
REMOVAL OF LIQUID GASKET SEALING .......... 2
LIQUID GASKET APPLICATION PROCEDURE ..... 2
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 6
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 7
NVH Troubleshooting Chart ..................................... 7
FRONT OIL SEAL ...................................................... 8
Removal and Installation .......................................... 8
REMOVAL ............................................................. 8
INSTALLATION ..................................................... 9
SIDE OIL SEALS ...................................................... 10
Removal and Installation ........................................ 10
REMOVAL ........................................................... 10
REAR COVER GASKET ...........................................11
Removal and Installation .........................................11
REMOVAL ............................................................11
INSTALLATION ....................................................11FRONT FINAL DRIVE ASSEMBLY .......................... 12
Removal and Installation ........................................ 12
REMOVAL ........................................................... 12
INSTALLATION ................................................... 13
Disassembly and Assembly .................................... 14
COMPONENTS ................................................... 14
ASSEMBLY INSPECTION AND ADJUSTMENT ... 15
DISASSEMBLY ................................................... 17
INSPECTION AFTER DISASSEMBLY ................ 22
ADJUSTMENT AND SELECTION OF ADJUST-
ING WASHERS ................................................... 23
ASSEMBLY ......................................................... 24
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 32
General Specifications ............................................ 32
Inspection and Adjustment ..................................... 32
DIFFERENTIAL SIDE GEAR CLEARANCE ....... 32
PRELOAD TORQUE ........................................... 32
BACKLASH ......................................................... 32
COMPANION FLANGE RUNOUT ....................... 32
SELECTIVE PARTS ............................................ 32

FFD-2
PRECAUTIONS
Revision: August 20072004 QX56
PRECAUTIONSPFP:00001
PrecautionsEDS0035E
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.
Precautions for Liquid GasketEDS0035F
REMOVAL OF LIQUID GASKET SEALING

After removing nuts and bolts, separate the mating surface and
remove old liquid gasket sealing using Tool.
CAUTION:
Be careful not to damage the mating surfaces.

Tap seal cutter to insert it, and then slide it by tapping on the
side as shown.

In areas where Tool is difficult to use, use plastic hammer to
lightly tap the parts, to remove it.
CAUTION:
If for some unavoidable reason tool such as screwdriver is
used, be careful not to damage the mating surfaces.
LIQUID GASKET APPLICATION PROCEDURE
1. Using scraper, remove old liquid gasket adhering to the gasket
application surface and the mating surface.

Remove liquid gasket completely from the groove of the gas-
ket application surface, bolts, and bolt holes.
2. Thoroughly clean the mating surfaces and remove adhering
moisture, grease and foreign materials.Tool number : KV10111100 (J-37228)
WBIA0566E
PBIC0003E

PRECAUTIONS
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FFD
Revision: August 20072004 QX56
3. Attach liquid gasket tube to Tool.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-45, "
Recommended Chemical Products and Sealants" .
4. Apply liquid gasket without breaks to the specified location with
the specified dimensions.

If there is a groove for liquid gasket application, apply liquid
gasket to the groove.

As for bolt holes, normally apply liquid gasket inside the
holes. Occasionally, it should be applied outside the holes.
Make sure to read the text of this manual.

Within five minutes of liquid gasket application, install the mat-
ing component.

If liquid gasket protrudes, wipe it off immediately.

Do not retighten nuts or bolts after the installation.

After 30 minutes or more have passed from the installation, fill
engine oil and engine coolant.
CAUTION:
If there are specific instructions in this manual, observe
them.Tool number : WS39930000 ( — )
WBIA0567E
SEM 15 9F

FFD-4
PREPARATION
Revision: August 20072004 QX56
PREPARATIONPFP:00002
Special Service ToolsEDS0035G
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
KV10111100
(J-37228)
Seal cutterRemoving steel oil pan and rear timing chain
case
WS39930000
(—)
Tube presserPressing the tube of liquid gasket
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: 32mm (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.
S-NT046
S-NT052
ZZA0702D
ZZA0811D
ZZA0700D
ZZA1046D
SDIA0217J

PREPARATION
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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,
ST33081000
(—)
AdapterRemoving and installing side bearing inner
race.
a: 33.5 mm (1.32 in) dia.
b: 43 mm (1.69 in) dia.
KV38108300
(J-44195)
Companion flange 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
total 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. Tool number
(Kent-Moore No.)
Tool nameDescription
ZZA1003D
NT107
ZZA0881D
NT771
NT124
SDIA2607E
ZZA1141D

FFD-6
PREPARATION
Revision: August 20072004 QX56
Commercial Service ToolsEDS0035H
—
(C-4171)
Handle
Removing drive pinion front bearing outer
race

Removing drive pinion rear bearing outer
race
—
(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
LDIA0134E
LDIA0135E
LDIA0135E
Tool nameDescription
Slide hammer

Removing front oil seal

Removing side oil seal
Power toolLoosening bolts and nuts
LDIA0133E
PBIC0190E

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
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Revision: August 20072004 QX56
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS0035I
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
FFD-15FFD-15

FFD-15
FFD-16
FFD-16
MA-24, "
Checking Final Drive Oil
"
PR-3, "
NVH Troubleshooting Chart
"
FSU-4, "
NVH Troubleshooting Chart
" (FSU) and RSU-5, "
NVH Troubleshooting Chart
" (RSU)
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
FAX -4, "
NVH Troubleshooting Chart
" (FAX) and RAX-4, "
NVH Troubleshooting Chart
" (RAX)
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
Axle and suspension
Tires
Road wheel
Drive axle
Brakes
Steering
Symptom Differential Noise×××××××××××××

FFD-8
FRONT OIL SEAL
Revision: August 20072004 QX56
FRONT OIL SEALPFP:38189
Removal and InstallationEDS0035J
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 FA X -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. Install slide hammer tool as shown and remove seal.Tool number : ST3127S000 (J-25765-A)
Tool number : KV38108300 (J-44195)
BDIA0001E
LDIA0129E
LDIA0130E

FRONT OIL SEAL
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Revision: August 20072004 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 (J-44195)
Tool number : ST3127S000 (J-25765-A)
Drive pinion nut : 298 - 678 N·m (31 - 69Kg-m, 220 - 500 ft-lb)
BDIA0001E