2011 INFINITI QX56 lock

TRANSFER ASSEMBLYDLN-121
< UNIT REMOVAL AND INSTALLATION > [TRANSFER: ATX90A]
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UNIT REMOVAL AND INSTALLATION
TRANSFER ASSEMBLY
Exploded ViewINFOID:0000000006222349
Removal and InstallationINFOID:0000000006222350
REMOVAL
1. Remove rear propeller shaft. Refer to DLN-144, "Removal and Installation".
2. Remove front propeller shaft. Refer to DLN-129, "
Removal and Installation".
3. Disconnect transfer control actuator, transfer rotary position sensor, transfer lock position sensor, transfer
Hi-Lo position sensor and transfer fluid temperatur e sensor harness connectors and separate harnesses
from transfer assembly.
4. Remove transfer breather hose.
5. Remove exhaust front tube (LH) with a power tool. Refer to EX-5, "
Removal and Installation".
6. Remove exhaust front tube (RH) with a power tool. Refer to EX-5, "
Removal and Installation".
7. Remove main muffler with a power tool. Refer to EX-5, "
Removal and Installation".
8. Support transfer assembly and transmission assembly with a jack. CAUTION:
Secure transfer assembly and tr ansmission assembly to a jack.
9. Remove rear engine mounting member and engine mounting insulator with a power tool. Refer to EM-99,
"Removal and Installation".
10. Lower jack to the position where the top transfer mounting bolts can be removed.
11. Remove transfer mounting bolts and separate transfer from transmission. CAUTION:
Secure transfer assembly and tr ansmission assembly to a jack.
INSTALLATION
Note the following, and install in the reverse order of removal.
1. Bracket 2. Bracket 3. Transfer assembly
: Vehicle front
JPDIE0286GB
Revision: 2010 May2011 QX56

DLN-148
< PRECAUTION >[FRONT FINAL DRIVE: R180A]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution Necessary for Steering W
heel Rotation after Battery Disconnect
INFOID:0000000006222372
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect bot h battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the bat tery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wi ll remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
5. When the repair work is completed, re-connect bot h battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Precaution for Servicing Front Final DriveINFOID:0000000006222373
 Before starting diagnosis of the vehicle, understand the symptoms well. Perform correct and systematic
operations.
 Check for the correct installation status prior to re moval or disassembly. When matching marks are required,
be certain they do not interfere with the f unction of the parts they are applied to.
 Overhaul should be done in a clean work area, a dust proof area is recommended.
 Before disassembly, completely remove sand and mud from the exterior of the unit, preventing them from
entering into the unit during disassembly or assembly.
 Always use shop paper for cleaning the inside of components.
 Avoid using cotton gloves or a shop cloth to prevent the entering of lint.
 Check appearance of the disassembled parts for dam age, deformation, and abnormal wear. Replace them
with new ones if necessary.
 Gaskets, seals and O-rings should be replaced any time the unit is disassembled.
 Clean and flush the parts sufficiently and blow them dry.
 Be careful not to damage sliding surfaces and mating surfaces.
 When applying sealant, remove the old sealant from the mating surface; then remove any moisture, oil, and
foreign materials from the application and mating surfaces.
 In principle, tighten nuts or bolts gradually in severa l steps working diagonally from inside to outside. If a
tightening sequence is specified, observe it.
 During assembly, observe the specified tightening torque.
 Add new differential gear oil, petroleum jelly, or multi-purpose grease, as specified.
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-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

FRONT OIL SEALDLN-159
< REMOVAL AND INSTALLATION > [FRONT FINAL DRIVE: R180A]
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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 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 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 dial indicator onto the companion flange face (inner side of the propeller shaft mounting bolt holes).
6. Rotate the companion flange to check for runout.
7. Fit a test indicator to the inner side of the companion flange (socket diameter).
8. Rotate the companion flange to check for runout.
9. If the runout value is outside the repair limit, follow the procedure below to adjust.
a. Check for runout while changing the phase between companion flange and drive pinion gear by 90 ° step,
and search for the position where the runout is the minimum.
b. If the runout value is still outside of the limit after the phase has been changed, possible causes are be an
assembly malfunction of drive pinion and pinion bear ing and malfunction of pinion bearing. Check for
these items and repair if necessary.
c. If the runout value is still outsi de of the limit after the check and repair, replace companion flange.
10. Install front propeller shaft. Refer to DLN-129, "
Removal and Installation".
11. Install drive shaft. Refer to FAX-22, "
Removal and Installation".
12. Refill gear oil to the final drive and check oil level. Refer to DLN-155, "
Refilling".
13. Check the final drive for oil leakage. Refer to DLN-155, "
Inspection".
Total preload torque: A value
that add 0.1 – 0.4 N·m
(0.01 – 0.04 kg-m, 1 – 3 in-lb) to
the measured value when re-
moving.
PDIA1003E
Companion flange runout : Refer to DLN-185, "Com-
panion Flange Runout".
Companion flange runout : Refer to DLN-185, "
Com-
panion Flange Runout".
JSDIA0116ZZ
Revision: 2010 May2011 QX56

DLN-164
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
SIDE SHAFT
UNIT DISASSEMBLY AND ASSEMBLY
SIDE SHAFT
Exploded ViewINFOID:0000000006222387
1. Bushing 2. Bearing cap 3. Side bearing
4. Side bearing adjusting washer 5. Drive pinion 6. Pinion height adjusting washer
7. Pinion rear bearing 8. Collapsible spacer 9. Gasket
10. Drain plug 11. Side oil seal (left side) 12. Pinion front bearing
13. Front oil seal 14. Companion flange 15. Drive pinion lock nut
16. Gear carrier 17. Side shaft 18. Side shaft bearing
19. Snap ring 20. Snap ring 21. Side oil seal (right side)
22. Drive gear 23. Differential case assembly 24. Housing spacer
25. Filler plug 26. Carrier cover
A: Oil seal lip B: Screw hole C. Comply with the assembly proce-
dure when tightening. Refer to DLN-
169, "Assembly".
: Apply gear oil. : Apply anti-corrosion oil.
JPDID0390GB
Revision: 2010 May2011 QX56

SIDE SHAFTDLN-165
< UNIT DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: R180A]
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DisassemblyINFOID:0000000006222388
1. Drain the differential gear oil if necessary.
2. Remove the carrier cover bolts
3. Remove carrier cover to insert the seal cutter (A) [SST: KV10111100 (J-37228)] between gear carrier and carrier cover.
CAUTION:
 Never damage the mating surface.
 Never insert flat-bladed screwdriver, this will damage themating surface.
4. Remove side oil seal (right side) with a suitable tool. CAUTION:
Never damage gear carrier.
5. Remove snap ring (hole side) with a suitable tool.
6. Remove differential side shaft assembly out of gear carrier with a suitable tool.
NOTE:
Tap on differential side shaft assembly from side gear side.
7. Remove snap ring (differential side shaft side).
: Apply multi-purpose grease.
: Apply Genuine Silicone RTV or equivalent. Refer to GI-22, "
Recommended Chemical Products and Sealants".
: Apply Genuine High Strength Thread Locking Sealant or equivalent. Refer to GI-22, "
Recommended Chemical Products
and Sealants".
Refer to GI-4, "
Components" for symbols not described above.
PDIA0699E
PDIA0713E
PDIA0714E
JPDID0383ZZ
Revision: 2010 May2011 QX56