INFINITI QX56 2011 Factory Service Manual

PREPARATIONDLN-189
< PREPARATION > [REAR FINAL DRIVE: R230]
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Commercial Service ToolINFOID:0000000006222408
—
(J-8129)
Spring gauge Measuring turning torque
KV38103300
(—)
Drift
a: 99 mm (3.90 in) dia. Installing drive pinion rear bearing outer race
ST30611000
(J-25742-1)
Drift bar Installing drive pinion front bearing outer race
ST30621000
(J-25742-5)
Drift
a: 79 mm (3.11 in) dia.
b: 59 mm (2.32 in) dia. Installing drive pinion front bearing outer race
ST30022000
(—)
Drift
a: 110 mm (4.33 in) dia.
b: 56 mm (2.20 in) dia.
c: 46 mm (1.81 in) dia. Installing pinion rear bearing inner race
Tool number
(Kent-Moore No.)
Tool name
Description
NT127
PDIA0933E
S-NT090
ZZA1000D
ZZA0978D
Revision: 2010 May2011 QX56

DLN-190
< PREPARATION >[REAR FINAL DRIVE: R230]
PREPARATION
Tool name
Description
Flange wrench Removing and installing drive pinion lock nut
Puller Removing companion flange
Sliding hammer Removing differential case assembly
Puller Removing drive pinion rear bearing inner race
Spacer
a: 60 mm (2.36 in) dia.
b: 36 mm (1.42 in) dia.
c: 30 mm (1.18 in) Installing drive pinion front bearing inner race
Power tool Loosing nuts and bolts
NT035
ZZA0119D
NT125
ZZA0700D
ZZA1133D
PBIC0190E
Revision: 2010 May2011 QX56

STRUCTURE AND OPERATIONDLN-191
< SYSTEM DESCRIPTION > [REAR FINAL DRIVE: R230]
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SYSTEM DESCRIPTION
STRUCTURE AND OPERATION
Sectional ViewINFOID:0000000006222409
CROSS-SECTIONAL VIEW
1. Side flange 2. Pinion mate gear 3. Drive gear
4. Pinion mate shaft 5. Differential case 6. Side bearing
7. Drive pinion 8. Pinion front bearing 9. Companion flange
10. Collapsible spacer 11. Pinion rear bearing 12. Side gear
PDIA0923E
Revision: 2010 May2011 QX56

DLN-192
< SYMPTOM DIAGNOSIS >[REAR FINAL DRIVE: R230]
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000006222410
Use the chart below to find the cause of the symp tom. If necessary, repair or replace these parts.
×: ApplicableReference page
DLN-215, "
Inspection
"
DLN-210, "
Adjustment
"
DLN-215, "
Inspection
"
DLN-210, "
Adjustment
"
DLN-210, "
Adjustment
"
DLN-193, "
Inspection
"
NVH of FRONT PROPELLER SHAFT in this section.
NVH of REAR PROPELLER SHAFT in this section.
NVH in FAX, RAX, and RSU sections.
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
Gear tooth rough
Gear contact improper
Tooth surfaces worn
Backlash incorrect
Companion flange excessive runout
Gear oil improper
PROPELLER SHAFT
AXLE AND SUSPENSION
TIRES
ROAD WHEEL
DRIVE SHAFT
BRAKES
STEERING
Symptom Noise
×××××××××××××
Revision: 2010 May2011 QX56

REAR DIFFERENTIAL GEAR OILDLN-193
< PERIODIC MAINTENANCE > [REAR FINAL DRIVE: R230]
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PERIODIC MAINTENANCE
REAR DIFFERENTIAL GEAR OIL
InspectionINFOID:0000000006222411
OIL LEAKAGE
Check that differential gear oil is not leaking fr om the rear final drive assembly or around it.
OIL LEVEL
 Remove filler plug (1) and check oil level from filler plug mounting
hole as shown in the figure.
CAUTION:
Never start engine while checking oil level.
 Set a gasket on filler plug (1) and install it on final drive assembly. Refer to DLN-203, "
Exploded View".
CAUTION:
Never reuse gasket.
DrainingINFOID:0000000006222412
1. Stop the engine.
2. Remove drain plug (1) and drain gear oil.
3. Set a gasket on drain plug (1) and install it to final drive assem- bly and tighten to the specified torque. Refer to DLN-203,
"Exploded View".
CAUTION:
Never reuse gasket.
RefillingINFOID:0000000006222413
1. Remove filler plug (1). Fill with new gear oil until oil level reaches the specified level near filler plug mounting hole.
2. After refilling oil, check oil level. Set a gasket to filler plug (1), then install it to final drive assembly. Refer to DLN-203,
"Exploded View".
CAUTION:
Never reuse gasket.
JPDID0415ZZ
JPDID0392ZZ
Oil grade and viscosity : Refer to MA-10, "Fluids and
Lubricants".
Oil capacity : Refer to DLN-222, "
General
Specification".
JPDID0415ZZ
Revision: 2010 May2011 QX56

DLN-194
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
FRONT OIL SEAL
REMOVAL AND INSTALLATION
FRONT OIL SEAL
Exploded ViewINFOID:0000000006222414
Removal and InstallationINFOID:0000000006222415
REMOVAL
CAUTION:
Verify identification stamp of replacement frequency pu
t in the lower part of gear carrier to determine
replacement for collapsible spacer when replacing front oil seal. Refer to “Identification stamp of
replacement frequency of front oil seal”. If coll apsible spacer replacement is necessary, remove final
drive assembly and disassemble it to replace front oil seal and collapsible spacer.
NOTE:
The reuse of collapsible spacer is pr ohibited in principle. However, it is reusable on a one-time basis
only in cases when replacing front oil seal.
Identification Stamp of Replacement Frequency of Front Oil Seal
 The diagonally shaded area in the figure shows stamping point for replacement frequency of front oil seal.
 The following table shows if collapsible spacer replacement is needed before replacing front oil seal.
When collapsible spacer replacement is required, disassemble
final drive assembly to replace collapsible spacer and front oil seal.
Refer to DLN-217, "
Disassembly".
1. Final drive assembly 2. Front oil seal 3. Companion flange
4. Drive pinion lock nut
A. Oil seal lip
: Vehicle front
: Apply gear oil. : Apply anti-corrosion oil.
Refer to GI-4, "
Components" for symbols not described above.
JPDID0393GB
Stamp collapsible spacer replacement
No stamp Not required
PDIA0976E
Revision: 2010 May2011 QX56

FRONT OIL SEALDLN-195
< REMOVAL AND INSTALLATION > [REAR FINAL DRIVE: R230]
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CAUTION:
Make a stamping after replacing front oil seal.
 After replacing front oil seal, make a stamping on t he stamping point in accordance with the table below in
order to identify replacement frequency.
CAUTION:
Make a stamping from left to right.
1. Make a judgment if a collapsible spacer replacement is required.
2. Drain gear oil. Refer to DLN-193, "
Draining".
3. Remove the drive shafts from final drive. Then suspend it by wire, etc. Refer to RAX-11, "
Removal and
Installation".
4. Remove the side flange using sliding hammer and attachment.
NOTE:
Circular clip installation position: Side flange
5. Remove the rear propeller shaft. Refer to DLN-144, "
Removal
and Installation".
6. Measure the total preload torque with the preload gauge (A) [SST: ST3127S000 (J-25765-A)].
NOTE:
Record the total preload torque measurement.
“0” or “0” on the far right of stamp Required
“01” or “1” on the far ri ght of stamp Not required
Stamp collapsible spacer replacement
Stamp before stamping Stamping on the far right Stamping
No stamp 00
“0”
(Front oil seal was replaced once.) 101
“01”
(Collapsible spacer and front oil seal were replaced last time.) 0010
“0” is on the far right.
(Only front oil seal was replaced last time.) 1...01
“1” is on the far right.
(Collapsible spacer and front oil seal were replaced last time.) 0 ...010
A : Attachment [SST: KV40104100 ( — )]
B : Sliding hammer [SST: ST36230000 (J-25840-A)]
JSDIA0105ZZ
PDIA1006E
Revision: 2010 May2011 QX56

DLN-196
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
FRONT OIL SEAL
7. Put matching mark (B) on the end of the drive pinion. The
matching mark (A) on companion flange (1).
CAUTION:
For matching mark, use pain t. Never damage companion
flange and drive pinion.
8. Remove the drive pinion lock nut using a flange wrench (com- mercial service tool).
9. Remove the companion flange using a puller (commercial ser- vice tool).
10. Remove the front oil seal using the puller (A) [SST: KV381054S0 (J-34286)].
INSTALLATION
JSDIA0038ZZ
JSDIA0039ZZ
JSDIA0040ZZ
PDIA0980E
Revision: 2010 May2011 QX56

FRONT OIL SEALDLN-197
< REMOVAL AND INSTALLATION > [REAR FINAL DRIVE: R230]
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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 t he drift (A) [SST: ST15310000 (J-
25640-B)].
CAUTION:
 Never reuse front oil seal.
 Never incline the new front oil seal when installing.
2. Align the matching mark (B) of drive pinion with the matching mark (A) of companion flange (1), and then install the compan-
ion flange.
3. Apply anti-corrosion oil to the thread and seat of new drive pin- ion lock nut, and temporarily tighten drive pinion lock nut to drive
pinion, using a flange wrench (commercial service tool).
CAUTION:
Never reuse drive pinion lock nut.
4. Tighten drive pinion lock nut within the limits of specified torque so as to keep the pinion bearing preload within a standard val-
ues, using the preload gauge (A) [SST: ST3127S000 (J-25765-
A)].
CAUTION:
 Adjust to the lower limit of the drive pinion lock nut tight-
ening torque first.
 If the preload torque exceeds the specified value, replace
collapsible spacer and tighte n it again to adjust. Never
loosen drive pinion lock nut to adjust the preload torque.
5. Fit a test indicator to the inner side of companion flange (socket diameter).
6. Rotate companion flange to check for runout.
 If the runout value is outside the runout limit, follow the proce-dure below to adjust.
- Check for runout while changing the phase between compan-
ion flange and drive pinion by 90 ° step, and search for the
position where the runout is the minimum.
PDIA0752J
JSDIA0038ZZ
Total preload torque : A value that add 0.1 – 0.4
N·m (0.01 – 0.04 kg-m, 0.9 –
3.5 in-lb) to the measured
value before removing.
PDIA1007E
Companion flange runout : Refer to DLN-222, "Com-
panion Flange Runout".
JPDID0399ZZ
Revision: 2010 May2011 QX56

DLN-198
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
FRONT OIL SEAL
- If the runout value is still outside of the limit
after the phase has been changed, possible cause will be an
assembly malfunction of drive pinion and pinion bearing and malfunction of pinion bearing. Check for
these items and repair if necessary.
- If the runout value is still outside of the limit after the check and repair, replace companion flange.
7. Make a stamping for identification of front oil seal replacement frequency. Refer to “Identification stamp of
replacement frequency of front oil seal”.
CAUTION:
Make a stamping after replacing front oil seal.
8. Install rear propeller shaft. Refer to DLN-144, "
Removal and Installation".
9. Install side flange with the following procedure.
a. Attach the protector [SST: KV38108000 ( — )] to side oil seal.
b. After the side flange is inserted and the serrated part of side gear has engaged the serrated part of flange, remove the pro-
tector.
c. Put a suitable drift on the center of side flange, then drive it until sound changes.
NOTE:
When installation is completed, driving sound of the side flange
turns into a sound that seems to affect the whole final drive.
d. Confirm that the dimension of the side flanges (1) installation measurement (A) in the figure comes into the following.
10. Install drive shaft. Refer to RAX-11, "
Removal and Installation".
11. Refill gear oil to the final drive and check oil level. Refer to DLN-
193, "Refilling".
12. Check the final drive for oil leakage. Refer to DLN-193, "
Inspec-
tion".
SDIA0822E
A : 342.2 mm (13.47 in)
JSDIA0185ZZ
Revision: 2010 May2011 QX56