INFINITI QX56 2011 Factory Service Manual

PREPARATIONDLN-149
< PREPARATION > [FRONT FINAL DRIVE: R180A]
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000006222374
The actual shapes of Kent-Moore t ools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool name Description
ST3127S000
(J-25765-A)
Preload gauge Measuring pinion bearing preload and total
preload
KV381054S0
(J-34286)
Puller Removing front oil seal
ST30720000
(J-25405)
Drift
a: 77 mm (3.03 in) dia.
b: 55.5 mm (2.185 in) dia.  Installing front oil seal
 Installing side oil seal
 Installing pinion front bearing outer race
ST27863000
(—)
Drift
a: 74.5 mm (2.933 in) dia.
b: 62.5 mm (2.461 in) dia.  Installing front oil seal
 Installing side oil seal
K V 1 0 1111 0 0
(J-37228)
Seal cutter Removing carrier cover
ZZA0806D
ZZA0601D
ZZA0811D
ZZA1003D
S-NT046
Revision: 2010 May2011 QX56

DLN-150
< PREPARATION >[FRONT FINAL DRIVE: R180A]
PREPARATION
ST3306S001
(J-22888-D)
Differential side bearing puller set
1: ST33051001
(J-22888-20)
Puller
2: ST33061000 (J-8107-2)
Base
a: 28.5 mm (1.122 in) dia.
b: 38 mm (1.50 in) dia. Removing and installing side bearing inner
race
KV10112100
(BT-8653-A)
Angle wrench Tightening the drive gear mounting bolts
ST33230000
(J-35867)
Drift
a: 51 mm (2.01 in) dia.
b: 41 mm (1.61 in) dia.
c: 28 mm (1.10 in) dia. Installing side bearing inner race
ST30611000
(J-25742-1)
Drift bar Installing pinion rear bearing outer race
(Use with ST30613000)
ST30613000
(J-25742-3)
Drift
a: 72 mm (2.83 in) dia.
b: 48 mm (1.89 in) dia. Installing pinion rear bearing outer race
KV38100200
(J-26233)
Drift
a: 65 mm (2.56 in) dia.
b: 49 mm (1.93 in) dia. Installing pinion front bearing outer race
Tool number
(Kent-Moore No.)
Tool name
Description
NT072
ZZA0120D
ZZA1046D
S-NT090
ZZA1000D
ZZA1143D
Revision: 2010 May2011 QX56

PREPARATIONDLN-151
< PREPARATION > [FRONT FINAL DRIVE: R180A]
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Commercial Service ToolINFOID:0000000006222375
ST30901000
(J-26010-01)
Drift
a: 79 mm (3.11 in) dia.
b: 45 mm (1.77 in) dia.
c: 35.2 mm (1.386 in) dia. Installing drive pinion rear bearing inner race
ST33200000
(J-26082)
Drift
a: 60 mm (2.36 in) dia.
b: 44.5 mm (1.752 in) dia. Installing drive pinion front bearing inner race
—
(J-34309)
Differential shim selector tool Adjusting bearing preload and pinion gear
height
—
(J-25269-18)
Side bearing disc (2 Req ′d) Selecting pinion height adjusting washer
Tool number
(Kent-Moore No.)
Tool name
Description
ZZA0978D
ZZA1002D
NT134
NT135
Tool name
Description
Power tool Loosening bolts and nuts
Flange wrench Removing and installing drive pinion lock nut
PBIC0190E
NT035
Revision: 2010 May2011 QX56

DLN-152
< PREPARATION >[FRONT FINAL DRIVE: R180A]
PREPARATION
Puller
Removing companion flange
Drift
a: 63 mm (2.48 in) dia. or less
b: 49 mm (1.93 in) dia. or more Removing and Installing bushing
Sliding hammer Removing differential case assembly
Replacer Removing pinion rear bearing inner race
Tool name
Description
ZZA0119D
ZZA0811D
NT125
ZZA0700D
Revision: 2010 May2011 QX56

STRUCTURE AND OPERATIONDLN-153
< SYSTEM DESCRIPTION > [FRONT FINAL DRIVE: R180A]
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SYSTEM DESCRIPTION
STRUCTURE AND OPERATION
Sectional ViewINFOID:0000000006222376
1. Side shaft 2. Side shaft bearing 3. Side gear
4. Drive gear 5. Pinion mate shaft 6. Differential case
7. Side bearing 8. Pinion mate gear 9. Drive pinion
10. Collapsible spacer 11. Companion flange 12. Pinion front bearing
13. Pinion rear bearing 14. Housing spacer
PDIA0695E
Revision: 2010 May2011 QX56

DLN-154
< SYMPTOM DIAGNOSIS >[FRONT FINAL DRIVE: R180A]
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000006222377
Use the chart below to help you find the cause of the symptom. If necessa ry, repair or replace these parts.
×: ApplicableReference
DLN-174, "
Inspection
"
DLN-171, "
Adjustment
"
DLN-174, "
Inspection
"
DLN-171, "
Adjustment
"
DLN-171, "
Adjustment
"
DLN-155, "
Inspection
"
NVH of FRONT PROPELLER SHAFT in this section.
NVH of REAR PROPELLER SHAFT in this section.
NVH in FAX, RAX, FSU and RSU sections.
NVH in WT section.
NVH in WT section.
NVH in FAX and 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
TIRE
ROAD WHEEL
DRIVE SHAFT
BRAKE
STEERING
Symptom Noise
×××××××××××××
Revision: 2010 May2011 QX56

FRONT DIFFERENTIAL GEAR OILDLN-155
< PERIODIC MAINTENANCE > [FRONT FINAL DRIVE: R180A]
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PERIODIC MAINTENANCE
FRONT DIFFERENTIAL GEAR OIL
InspectionINFOID:0000000006222378
OIL LEAKAGE
Check that oil is not leaking from the front 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-167, "
Exploded View".
CAUTION:
Never reuse gasket.
DrainingINFOID:0000000006222379
1. Stop 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-167,
"Exploded View".
CAUTION:
Never reuse gasket.
RefillingINFOID:0000000006222380
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-167,
"Exploded View".
CAUTION:
Never reuse gasket.
JPDID0312ZZ
JPDID0313ZZ
Oil grade and Viscosity : Refer to MA-10, "Fluids
and Lubricants".
Oil capacity : Refer to DLN-185, "
Gen-
eral Specifications".
JPDID0312ZZ
Revision: 2010 May2011 QX56

DLN-156
< REMOVAL AND INSTALLATION >[FRONT FINAL DRIVE: R180A]
FRONT OIL SEAL
REMOVAL AND INSTALLATION
FRONT OIL SEAL
Exploded ViewINFOID:0000000006222381
Removal and InstallationINFOID:0000000006222382
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 fron t oil seal and collapsible spacer. Refer to DLN-162,
"Removal and Installation" and DLN-168, "Disassembly".
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-168, "
Disassembly".
1. Front final drive assembly 2. Front oil seal 3. Companion flange
4. Drive pinon lock nut
A. Oil seal lip
: Apply multi-purpose grease.: Apply anti-corrosion oil.
Refer to GI-4, "
Components" for symbols not described on the above.
JPDID0386GB
Stamp collapsible spacer replacement
No stamp Not required
“0” or “0” on the far right of stamp Required
“01” or “1” on the far ri ght of stamp Not required
PDIA1001E
Revision: 2010 May2011 QX56

FRONT OIL SEALDLN-157
< REMOVAL AND INSTALLATION > [FRONT FINAL DRIVE: R180A]
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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 judgement if a collapsible spacer replace is required.
2. Drain gear oil. Refer to DLN-155, "
Draining".
3. Remove the drive shafts from the front final drive assembly. Refer to FAX-22, "
Removal and Installation".
4. Remove the front propeller shaft from the front final drive assembly. Refer to DLN-129, "
Removal and
Installation".
5. Measure the total preload torque using preload gauge (A) [SST: ST3127S000 (J-25765-A)].
NOTE:
Record the total preload torque measurement.
6. Put matching mark (B) on the end of drive pinion. The matching mark should be in line with the matching mark (A) on companion
flange (1).
CAUTION:
For matching, marks use paint. Never damage companion
flange and drive pinion.
7. Remove the drive pinion lock nut using flange wrench (commer- cial service tool).
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
PDIA1002E
PDIA0799J
PDIA1004E
Revision: 2010 May2011 QX56

DLN-158
< REMOVAL AND INSTALLATION >[FRONT FINAL DRIVE: R180A]
FRONT OIL SEAL
8. Remove the companion flange using puller (commercial service
tool).
9. Remove front oil seal using the puller [SST: KV381054S0 (J- 34286)].
INSTALLATION
1. Drive the front oil seal in evenl y until it becomes flush with the
gear carrier using drifts (A and B).
CAUTION:
 Never reuse oil seal.
 Never incline oil seal when installing.
 Apply multi-purpose grease to the lips and differential
gear oil to the circumference of oil seal.
2. Install companion flange (1). NOTE:
When reusing drive pinion, align the matching mark (B) of drive
pinion with the matching mark (A) of companion flange, and then
install companion flange (1).
LDIA0171E
LDIA0172E
A: Drift [SST: ST30720000 (J-25405)]
B: Drift [SST: ST27863000 ( — )]
WDIA0147E
PDIA0799J
Revision: 2010 May2011 QX56