INFINITI QX56 2007 Factory Service Manual

REAR OIL SEAL
TF-119
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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 PR-8, "
Removal and
Installation".
5. Refill the transfer with fluid and check fluid level. Refer to TF-11,
"Replacement".
6. Check the transfer for fluid leakage. Refer to TF-11, "
Inspec-
tion". Tool number : KV40105310 ( — )
PDIA0116E

TF-120
< SERVICE INFORMATION >
SIDE OIL SEAL
SIDE OIL SEAL
Removal and InstallationINFOID:0000000003532565
REMOVAL
1. Remove the front propeller shaft. Refer to PR-4, "Removal and Installation".
2. Remove the companion flange. Refer to TF-116, "
Removal and Installation".
3. Remove the transfer control device from the transfer assembly. Refer to TF-121, "
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 of
case 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 TF-121, "
Removal and Installation".
3. Install the companion flange. Refer to TF-116, "
Removal and
Installation".
4. Install the front propeller shaft. Refer to PR-4, "
Removal and Installation".
SDIA2666E
Tool number : ST22360002 (J-25679-01)
SDIA2665E

TRANSFER CONTROL DEVICE
TF-121
< SERVICE INFORMATION >
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TRANSFER CONTROL DEVICE
Removal and InstallationINFOID:0000000003532566
CAUTION:
• Change vehicle state to 2WD, and then remove and install transfer control device.
• Check 4WD shift indicator after installation. Refer to TF-3, "
Precaution for Transfer Assembly and
Transfer Control Unit Replacement".
1. Shift lever 2. Transfer control device
SDIA2654E

TF-122
< SERVICE INFORMATION >
AIR BREATHER HOSE
AIR BREATHER HOSE
Removal and InstallationINFOID:0000000003532567
CAUTION:
• Make sure there are no pinched or restricted areas on each air breather hose caused by bending or
winding when installing it.
• Install each air breather hose into the breather tube (metal
connector) until the hose end reaches the end of the curve
section. 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 and clip B with the paint mark fac-
ing upward.
1. Breather tube 2. Clip A 3. Clip B
4. Clip C 5. Clip D 6. Clip E
7. Actuator 8. Air breather hose clamp 9. Clip F
10. Transfer motor 11. Breather tube (transfer)
SDIA3339E
SDIA3341E
SDIA3342E

AIR BREATHER HOSE
TF-123
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• Install clip C on actuator/transfer motor air breather hose and
transfer air breather hose with the paint mark matched.
• Install actuator/transfer motor air breather hose and transfer
air breather hose on clip D and clip E with the paint mark fac-
ing 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 F on transfer motor air breather hose and transfer
air breather hose with the paint mark matched.
SDIA3343E
SDIA3344E
SDIA3226E
SDIA3345E

TF-124
< SERVICE INFORMATION >
AIR BREATHER HOSE
• Install the transfer air breather hose into the breather tube
(transfer, metal connector) until the hose end reaches the
base of the tube. Set transfer air breather hose with paint
mark facing upwards.
• Install the transfer motor air 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

TRANSFER MOTOR
TF-125
< SERVICE INFORMATION >
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TRANSFER MOTOR
Removal and InstallationINFOID:0000000003532568
REMOVAL
1. Disconnect the transfer motor connector.
2. Remove the air breather hose from the transfer motor. Refer to
TF-122, "
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 TF-128, "
Disassembly and Assembly".
CAUTION:
Be sure to install connector bracket.
3. Install the air breather hose to the transfer motor. Refer to TF-
122, "Removal and Installation".
4. Connect the transfer motor connector.
5. Check the transfer fluid. Refer to TF-11, "
Replacement".
6. Start the engine for one minute. Then stop the engine and recheck the transfer fluid. Refer to TF-11,
"Inspection".
SDIA2133E
SDIA2787E

TF-126
< SERVICE INFORMATION >
TRANSFER OIL FILTER
TRANSFER OIL FILTER
Removal and InstallationINFOID:0000000003532569
REMOVAL
1. Remove the oil filter bolts and oil filter.
CAUTION:
• Do not damage center case and oil filter.
• Loosen bolts and detach oil filter evenly.
2. Remove the O-rings (1) from the oil filter (2).
3. Remove the oil filter stud from the oil filter.
4. Remove the O-ring from the oil filter stud.
INSTALLATION
1. Apply ATF to the new O-ring, and install it on the oil filter stud.
CAUTION:
Do not reuse O-ring.
2. Install the oil filter stud to the oil filter.
SMT875C
WDIA0285E
SDIA3180E
SDIA3180E

TRANSFER OIL FILTER
TF-127
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3. Apply ATF to the two new O-rings (1), and install them on the oil
filter (2).
CAUTION:
Do not reuse O-rings.
4. Install the oil filter to the transfer assembly. Tighten the bolts to
the specified torque. Refer to TF-128, "
Disassembly and
Assembly".
CAUTION:
• Do not damage oil filter.
• Attach oil filter and tighten bolts evenly.
5. Check the transfer fluid. Refer to TF-11
.
6. Start the engine and let it run for one minute. Then stop the
engine and recheck the transfer fluid. Refer to TF-11
.
WDIA0285E
SDIA2136E

TF-128
< SERVICE INFORMATION >
TRANSFER ASSEMBLY
TRANSFER ASSEMBLY
Removal and InstallationINFOID:0000000003532570
REMOVAL
1. Remove the drain plug and gasket. Drain the fluid. Refer to TF-11, "Replacement".
2. Remove the A/T undercover using power tool.
3. Remove the center exhaust tube and main muffler. Refer to EX-3, "
Removal and Installation".
4. Remove the front and rear propeller shafts. Refer to PR-4, "
Removal and Installation" (front), PR-8,
"Removal and Installation" (rear).
CAUTION:
Do not damage spline, sleeve yoke and rear oil seal when removing rear propeller shaft.
NOTE:
Insert a plug into the rear oil seal after removing the rear propeller shaft.
5. Remove the A/T nuts from the A/T crossmember.
6. Position two suitable jacks under the A/T and transfer assembly.
7. Remove the crossmember. Refer to AT-223, "
Removal and Installation (2WD)".
WARNING:
Support A/T and transfer assembly using two suitable jacks while removing crossmember.
8. Disconnect the electrical connectors from the following:
•ATP switch
• Neutral 4LO switch
• Wait detection switch
• Transfer motor
• Transfer control device
• Transfer terminal cord assembly
9. Disconnect each air breather hose from the following. Refer to TF-122, "
Removal and Installation".
• Actuator
• Breather tube (transfer)
• Transfer motor (case connector)
10. Remove the transfer control device from the extension housing.
11. Remove the transfer to A/T and A/T to transfer bolts.
WARNING:
Support transfer assembly with suitable jack while removing it.
12. Remove the transfer assembly.
INSTALLATION
Installation is in the reverse order of removal.
• Tighten the bolts to specification.
• After installation check the transfer fluid level and for fluid leakage.
Refer to TF-11
.
• After filling, start the engine and let it run for one minute. Then stop
the engine and recheck the transfer fluid.
Disassembly and AssemblyINFOID:0000000003532571
COMPONENTS
Bolt length : 45 mm (1.77 in)
Transfer bolt torque : 36 N·m (3.7 kg-m, 27 ft-lb)
SDIA3181E