INFINITI QX56 2006 Factory Service Manual

RFD-6
PREPARATION
Revision: November 20092006 QX56
Tool nameDescription
Power tool Loosening nuts and bolts
PBIC0190E

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGRFD-7
CE F
G H
I
J
K L
M A
B
RFD
Revision: November 2009 2006 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS0044N
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: Applicable
Reference page
RFD-23RFD-17RFD-17RFD-18RFD-18RFD-8
PR-3, "
NVH Troubleshooting Chart
"

RAX-4, "
NVH Troubleshooting Chart
"
RSU-5, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
WT-4, "
NVH Troubleshooting Chart
"
FAX-4, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Gear tooth rough
Gear contact improper
Tooth surfaces worn
Backlash incorrect
Companion flange excessive runout
Gear oil improper
PROPELLER SHAFT
REAR AXLE
REAR SUSPENSION
TIRES
ROAD WHEEL
DRIVE SHAFT
BRAKES
STEERING
Symptom FINAL DRIVE Noise ××××××××××××××

RFD-8
DIFFERENTIAL GEAR OIL
Revision: November 20092006 QX56
DIFFERENTIAL GEAR OILPFP:KLD30
Changing Differential Gear OilEDS0044O
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 RFD-15,
"COMPONENTS" .
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 RFD-15,
"COMPONENTS" .
CAUTION:
Do not reuse gasket.
Checking Differential Gear OilEDS0044P
OIL LEAKAGE AND OIL LEVEL
1. Make sure that differential gear oil is not leaking 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 checking 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 RFD-15,
"COMPONENTS" .
CAUTION:
Do not reuse gasket.
LLIA0068E
Differential gear oil
grade and capacity : Refer to
MA-11, "Fluids
and Lubricants" .
LLIA0068E
LLIA0068E

FRONT OIL SEALRFD-9
CE F
G H
I
J
K L
M A
B
RFD
Revision: November 2009 2006 QX56
FRONT OIL SEALPFP:38189
Removal and InstallationEDS0044Q
REMOVAL
1. Remove the drive shafts from the rear final drive assembly. Refer to RAX-7, "Removal and Installation" .
2. Remove the side flanges and side oil seals. Refer to RFD-11, "
Removal and Installation" .
3. Remove the rear propeller shaft. Refer to PR-8, "
Removal and Installation" .
4. Measure the total preload torque. Refer to RFD-16, "
Total Preload Torque" .
NOTE:
Record the total preload torque measurement.
5. Remove the drive pinion lock nut using Tool.
6. Put matching marks on the companion flange and drive pinion using paint.
CAUTION:
Use paint to make the matching marks. Do not damage the
companion flange or drive pinion.
7. Remove the companion flange using suitable tool.
8. Remove the front oil seal using Tool.
INSTALLATION
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 front oil seal when installing.

Apply multi-purpose grease to the lips of the new front oil
seal.Tool number : KV40104000 ( — )
SDIA1142E
SDIA1054E
Tool number : KV381054S0 (J-34286)
SDIA0485E
Tool number : ST15310000 ( — )
PDIA0565E

RFD-10
FRONT OIL SEAL
Revision: November 20092006 QX56
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 Tool A, and check
the total preload torque using Tool B.

The total preload torque should be within the total preload
torque 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
preload torque is met.
CAUTION:

Do not reuse drive pinion lock nut.

Apply anti-corrosive oil to the 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 RFD-15, "
COMPONENTS" .

Do not loosen drive pinion lock nut to adjust the total preload torque. If the total preload torque
exceeds the specifications, replace the collapsible spacer and tighten it again to adjust. Refer to
RFD-15, "
Disassembly and Assembly" .

After adjustment, rotate drive pinion back and forth 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 RFD-8, "
Checking Differential Gear
Oil" .
Tool number A: KV40104000 ( — )
B: ST3127S000 (J-25765-A)
Total preload torque: Refer to RFD-16, "
To ta l P r e l o a d
To r q u e" .
WDIA0380E

SIDE OIL SEALRFD-11
CE F
G H
I
J
K L
M A
B
RFD
Revision: November 2009 2006 QX56
SIDE OIL SEALPFP:33142
Removal and InstallationEDS0044R
REMOVAL
1. Remove the drive shaft from the rear final drive assembly. Refer to RAX-7, "Removal and Installation" .
2. Remove the side flange using Tools.
3. Remove the side oil seal using suitable tool. CAUTION:
Do not to damage gear carrier.
INSTALLATION
1. Apply multi-purpose grease to the lips of the new side oil seal.Then drive the new side oil seal in evenly until it becomes flush
with the gear carrier using Tool.
CAUTION:

Do not reuse side oil seal.

Do not incline the new side oil seal when installing.

Apply multi-purpose grease to the lips of the new side oil
seal.
2. Install the side flange using Tool.
a. Install the Tool to the side oil seal as shown.
b. Insert the side flange until the serrated part of the side flange has engaged the serrated part of the side gear and remove the
To o l .
c. Drive in the side flange using suitable tool. NOTE:
Installation is completed when the driving sound of the side
flange turns into a sound which seems to affect the whole rear
final drive assembly.
3. Installation of the remaining components is in the reverse order of removal.
CAUTION:
Check the differential gear oil level after installation. Refer to RFD-8, "
Checking Differential Gear
Oil" .
Tool numbers A: KV40104100 ( — )
B: ST36230000 (J-25840-A)
WDIA0115E
LDIA0109E
Tool number : ST35271000 ( — )
LDIA0111E
Tool number : KV38107900 (J-39352)
SDIA0822E

RFD-12
CARRIER COVER
Revision: November 20092006 QX56
CARRIER COVERPFP:38351
Removal and InstallationEDS0044S
REMOVAL
1. Remove the rear final drive assembly. Refer to RFD-13, "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 screwdriver, this will damage the
mating surface.
INSTALLATION
1. Apply a 3 mm (0.12 in) bead of sealant to the mating surface ofthe carrier cover as shown.

Use Genuine Silicone RTV or equivalent. Refer to GI-46,
"Recommended Chemical Products and Sealants" .
CAUTION:
Remove any old sealant adhering 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 RFD-15, "
COMPONENTS" .
3. Install the rear final drive assembly. Refer to RFD-13, "
Removal
and Installation" .
CAUTION:
Fill the rear final drive assembly with recommended differential gear oil. Refer to RFD-8, "
DIFFER-
ENTIAL GEAR OIL" .
Tool number : KV10111100 (J-37228)
WDIA0123E
WDIA0282E

REAR FINAL DRIVE ASSEMBLYRFD-13
CE F
G H
I
J
K L
M A
B
RFD
Revision: November 2009 2006 QX56
REAR FINAL DRIVE ASSEMBLYPFP:38300
Removal and InstallationEDS0044T
REMOVAL
1. Remove the spare tire.
2. Drain the differential gear oil. Refer to FFD-7, "
DIFFERENTIAL GEAR OIL" .
3. Remove the rear stabilizer bar. Refer to RSU-42, "
Removal and Installation" .
4. Remove the rear propeller shaft. Refer to PR-8, "
Removal and Installation" .
5. Remove the rear drive shafts from the rear final drive assembly and support them using suitable wire. Refer to RAX-7, "
Removal
and Installation" .
6. Disconnect the breather hose from the rear final drive assembly.
1. Breather hose 2. Rear final drive assembly3. Rear propeller shaft
4. Washer 5. Lower stopper6. Rear drive shaft
7. Rear final drive assembly 8. Upper stopper⇐Vehicle front
WDIA0375E
LDIA0164E

RFD-14
REAR FINAL DRIVE ASSEMBLY
Revision: November 20092006 QX56
7. Place a suitable jack under the rear final drive assembly.
CAUTION:
Do not place the jack on the carrier cover.
8. Remove the nuts and bolts and remove the rear final drive assembly.
CAUTION:
Secure rear final drive assembly to the jack while removing
it.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:

When installing the breather hose make sure the painted marking on the metal end of breather
hose is to the front of the vehicle and there are no pinched or restricted areas on the breather
hose caused by folding or bending when installing it.

When installing the breather hose insert the plastic end of the breather hose into the hole in the
suspension member.

Fill the rear final drive assembly with differential gear oil after installation. Refer to RFD-8, "DIF-
FERENTIAL GEAR OIL" .
WDIA0117E

REAR FINAL DRIVE ASSEMBLYRFD-15
CE F
G H
I
J
K L
M A
B
RFD
Revision: November 2009 2006 QX56
Disassembly and AssemblyEDS0044U
COMPONENTS
WDIA0191E