INFINITI QX56 2008 Factory Service Manual

REAR OIL SEALDLN-131
< ON-VEHICLE REPAIR > [ATX14B]
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REAR OIL SEAL
Removal and InstallationINFOID:0000000001604414
REMOVAL
1. Partially drain the transfer fluid. Refer to DLN-127, "Replacement".
2. Remove the rear propeller shaft. Refer to DLN-194, "
Removal and Installation".
3. Remove the dust cover from the rear case. CAUTION:
Do not damage the rear case.
4. Remove the rear oil seal from the rear case using Tool. CAUTION:
Do not damage the rear case.
INSTALLATION
1. Install the new rear oil seal until it is flush with the end face of the
rear case using Tool.
CAUTION:
• Do not reuse oil seal.
• Apply petroleum jelly to oil seal.
2. Apply petroleum jelly to the circumference of the new dust cover. Position the new dust cover using the identification mark as
shown.
CAUTION:
• Do not reuse dust cover.
• Position the identification mark at the position shown.
WDIA0127E
Tool number : KV381054S0 (J-34286)
LDIA0139E
Tool number : ST30720000 (J-25405)
LDIA0140E
SDIA3436E
Revision: March 2010 2008 QX56

DLN-132
< ON-VEHICLE REPAIR >[ATX14B]
REAR OIL SEAL
3. Install the new dust cover to the rear case using Tool.
CAUTION:
• Do not reuse dust cover.
• Apply petroleum jelly to dust cover.
4. Install the rear propeller shaft. Refer to DLN-194, "
Removal and
Installation".
5. Refill the transfer with fluid and check for fluid leakage and fluid level. Refer to DLN-127, "
Replacement".
Tool number : KV40105310 ( — )PDIA0116E
Revision: March 2010
2008 QX56

SIDE OIL SEALDLN-133
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SIDE OIL SEAL
Removal and InstallationINFOID:0000000001604415
REMOVAL
1. Remove the front propeller shaft. Refer to DLN-184, "Removal and Installation".
2. Remove the companion flange. Refer to DLN-140, "
Disassembly and Assembly".
3. Remove the transfer control device from the transfer assembly. Refer to DLN-134, "
Removal and Installa-
tion".
4. Remove the side oil seal using suitable tool. CAUTION:
Do not damage shift cross.
INSTALLATION
1. Install the new side oil seal until it is flush with the end face ofcase using Tool.
CAUTION:
• Do not reuse oil seal.
• Apply petroleum jelly to oil seal.
2. Install the transfer control device to the transfer assembly. Refer to DLN-134, "
Removal and Installation".
3. Install the companion flange. Refer to DLN-140, "
Disassembly
and Assembly".
4. Install the front propeller shaft. Refer to DLN-184, "
Removal and Installation".
SDIA2666E
Tool number : ST22360002 (J-25679-01)
SDIA2665E
Revision: March 2010 2008 QX56

DLN-134
< ON-VEHICLE REPAIR >[ATX14B]
TRANSFER CONTROL DEVICE
TRANSFER CONTROL DEVICE
Removal and InstallationINFOID:0000000001604416
CAUTION:
• Change vehicle state to AUTO, and then remove and install transfer control device.
• Check 4WD shift indicator after installation. Refer to
DLN-119, "
Precaution for Transfer Assembly
and Transfer Control Unit Replacement".
1. Shift lever2. Actuator
SDIA2654E
Revision: March 2010 2008 QX56

AIR BREATHER HOSEDLN-135
< ON-VEHICLE REPAIR > [ATX14B]
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AIR BREATHER HOSE
Removal and InstallationINFOID:0000000001604417
REMOVAL
INSTALLATION
CAUTION:
• Make sure there are no pinched or restricted areas on each air breather hose caused by folding or
bending when installing it.
• Install each air breather hose into the breather tube (4). Set each air breather hose with paint mark facing upward.
• Install actuator/transfer motor air breather hose and transfer air breather hose on clip (A) with the paint mark facing
upward.
AWDIA0010ZZ
1. Breather tube 2. Clip A3. Clip B
4. Clip C 5. Clip D6. Actuator
7. Air breather hose clamp 8. Clip E 9. Transfer motor
10. Breather tube (transfer) Vehicle front
z A/T breather hose (1)
z Transfer breather hose (2)
z Actuator/transfer motor breather hose (3)
zz Breather tube (4)
zz Paint marks (A)
ALDIA0110ZZ
z Actuator/transfer motor breather hose (1)
z Transfer breather hose (2)
z Clip (A)
z Paint marks (B)
ALDIA0111ZZ
Revision: March 2010 2008 QX56

DLN-136
< ON-VEHICLE REPAIR >[ATX14B]
AIR BREATHER HOSE
• Install clip (B) on actuator/tr
ansfer motor air breather hose
and transfer air breather hose with the paint mark matched.
• Install actuator/transfer moto r air breather hose (1) and trans-
fer air breather hose (2) on clip (B) and clip (C) with the paint
mark (A) and (D) facing upward.
• Install the actuator air breather hose into the actuator (case connector) until the hose end reaches the base of the tube.
Set actuator air breather hose with paint mark facing leftward.
• Install clip (B) on transfer motor air breather hose (2) and transfer air breather hose (1) with the paint mark (A) matched.
z Actuator/transfer motor breather hose (1)
z Transfer breather hose (2)
z Paint marks (A)
z Clip (B)
AWDIA0011ZZ
z Actuator/transfer motor breather hose (1)
z Transfer breather hose (2)
z Paint marks (A)
z Clip (B)
z Clip (C)
z Paint marks (D)
AWDIA0012ZZ
SDIA3226E
z Transfer breather hose (1)
z Actuator/transfer motor breather hose (2)
zz Paint marks (A)
z Clip (B)
AWDIA0013ZZ
Revision: March 2010 2008 QX56

AIR BREATHER HOSEDLN-137
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• Install the transfer air breather hose into the breather tube (transfer, metal connector) un til the hose end reaches the
base of the tube. Set transfer air breather hose with paint
mark facing upwards.
• Install the transfer motor ai r breather hose into the transfer
motor (case connector) until the hose end reaches the end of
the curved section. Set transfer motor air breather hose with
paint mark facing leftward.
SDIA3196E
SDIA3194E
Revision: March 2010 2008 QX56

DLN-138
< ON-VEHICLE REPAIR >[ATX14B]
TRANSFER MOTOR
TRANSFER MOTOR
Removal and InstallationINFOID:0000000001604418
REMOVAL
1. Disconnect the transfer motor connector.
2. Remove the transfer motor air breather hose from the transfer
motor. Refer to DLN-135, "
Removal and Installation".
3. Remove the transfer motor bolts.
4. Remove the transfer motor.
INSTALLATION
1. Apply ATF to the new O-ring and install it to the transfer motor. CAUTION:
Do not reuse O-rings.
2. Fit the double-flat end of the transfer motor shaft into the slot of the sub-oil pump assembly. Then tighten to the specified torque.
Refer to DLN-140, "
Disassembly and Assembly".
CAUTION:
Be sure to install connector bracket.
3. Install the transfer motor air breather hose to the transfer motor. Refer to DLN-135, "
Removal and Installation".
4. Connect the transfer motor connector.
5. Check the transfer fluid. Refer to DLN-127, "
Inspection".
6. Start the engine for one minute. Then stop the engine and recheck the transfer fluid. Refer to DLN-127,
"Inspection".
SDIA2133E
SDIA2787E
Revision: March 2010 2008 QX56

TRANSFER ASSEMBLYDLN-139
< REMOVAL AND INSTALLATION > [ATX14B]
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REMOVAL AND INSTALLATION
TRANSFER ASSEMBLY
Removal and InstallationINFOID:0000000001604419
REMOVAL
1. Set transfer state as 2WD when 4WD shift switch is at 2WD.
2. Remove the undercovers using power tool.
3. Drain the transfer fluid. Refer to DLN-127, "
Replacement".
4. Remove the center exhaust tube and main muffler. Refer to EX-6, "
Removal and Installation".
5. Remove the front and rear propeller shafts. Refer to DLN-184, "
Removal and Installation" (front), DLN-
184, "Removal and Installation" (rear).
CAUTION:
Do not damage spline, sleeve yoke and rear oi l seal when removing rear propeller shaft.
NOTE:
Insert a plug into the rear oil seal after removing the rear propeller shaft.
6. Remove the A/T nuts from the A/T crossmember. Refer to TM-216, "
Removal and Installation (4WD)".
7. Position two suitable jacks under the A/T and transfer assembly.
8. Remove the crossmember. Refer to TM-216, "
Removal and Installation (4WD)".
WARNING:
Support A/T and transfer assembly using two suitable jacks while removing crossmember.
9. Disconnect the electrical connectors from the following: • ATP switch
• Neutral 4LO switch
• Wait detection switch
• Transfer motor
• Transfer control device
• Transfer terminal cord assembly
10. Disconnect each air breather hose from the following. Refer to DLN-135, "
Removal and Installation".
• Actuator
• Breather tube (transfer)
• Transfer motor
11. Remove the transfer control dev ice from the extension housing.
12. Remove the transfer to A/T and A/T to transfer bolts.
13. Remove the transfer assembly. WARNING:
Support transfer assembly with su itable jack while removing it.
CAUTION:
Do not damage rear oil seal (A/T).
INSTALLATION
Installation is in the reverse order of removal.
• Tighten the bolts to specification.
• Fill the transfer with new fluid and check for fluid leakage and fluid level. Refer to DLN-127, "
Replacement".
• Start the engine for one minute. Then stop the engine and recheck the transfer fluid. Refer to DLN-127, "
Inspection".
Transfer bolt torque : 36 N·m (3.7 kg-m, 27 ft-lb)
SMT872C
Revision: March 2010
2008 QX56

DLN-140
< DISASSEMBLY AND ASSEMBLY >[ATX14B]
TRANSFER ASSEMBLY
DISASSEMBLY AND ASSEMBLY
TRANSFER ASSEMBLY
Disassembly and AssemblyINFOID:0000000001604420
COMPONENTS
1. 2-4 sleeve
2. L-H sleeve 3. Snap ring
4. Internal gear 5. Planetary carrier assembly 6. Metal bushing
7. Needle bearing 8. Sun gear 9. Carrier bearing
10. Snap ring 11. Snap ring 12. Input bearing
13. Wait detection switch 14. Check plug 15. Check spring
16. Check ball 17. Front case 18. Snap ring
19. Input oil seal 20. Shift cross 21. Side oil seal
22. Lock pin 23. Shift lever 24. Gasket
25. Drain plug 26. Front oil seal 27. Companion flange
28. Self-lock nut 29. Mainshaft 30. Needle bearing
31. Front bearing 32. Front drive shaft 33. Rear bearing
34. Spacer 35. Drive chain 36. Clutch drum
37. Snap ring 38. Clutch hub 39. Snap ring
AWDIA0014GB
Revision: March 2010 2008 QX56