INFINITI QX56 2004 Factory Service Manual

AT-250
ON-VEHICLE SERVICE
Revision: August 20072004 QX56
7. Remove A/T fluid temperature sensor 2 with bracket from con-
trol valve with TCM.
8. Remove bracket from A/T fluid temperature sensor 2.
Installation
CAUTION:
After completing installation, check fluid leakage and fluid level. Refer to AT-1 3, "
Changing A/T Fluid"
, AT-1 3, "Checking A/T Fluid" .
1. Install A/T fluid temperature sensor 2 to bracket.
2. Install A/T fluid temperature sensor 2 (with bracket) in control
valve with TCM. Tighten A/T fluid temperature sensor 2 mount-
ing bolt to the specified torque. Refer to AT-241, "
COMPO-
NENTS" .
CAUTION:
Adjust bolt hole of bracket to bolt hole of control valve with
TCM.
SCIA5253E
SCIA5264E
SCIA5264E
SCIA5253E

ON-VEHICLE SERVICE
AT-251
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Revision: August 20072004 QX56
3. Connect A/T fluid temperature sensor 2 connector.
4. Securely fasten A/T temperature sensor 2 harness with terminal
clip.
5. Install oil pan to transmission case.
a. Install oil pan gasket to oil pan.
CAUTION:

Do not reuse oil pan gasket.

Install it in the direction to align hole positions.

Complete remove all moisture, oil and old sealant, etc. From oil pan gasket mounting surfaces.
b. Install oil pan (with oil pan gasket) to transmission case.
CAUTION:

Install it so that drain plug comes to the position as
shown in the figure.

Be careful not to pinch harnesses.

Complete remove all moisture, oil and old sealant, etc.
From oil pan mounting surfaces.
c. Tighten oil pan mounting bolts to the specified torque in numeri-
cal order shown in the figure after temporarily tightening them.
Refer to AT- 2 4 1 , "
COMPONENTS" .
CAUTION:
Do not reuse oil pan mounting bolts.
6. Install drain plug to oil pan. Tighten drain plug to the specified
torque. Refer to AT-241, "
COMPONENTS" .
CAUTION:
Do not reuse drain plug gasket.
7. Pour ATF into transmission assembly. Refer to AT-13, "
Chang-
ing A/T Fluid" .
8. Connect the negative battery terminal
SCIA5023E
SCIA5146E
SCIA2308E
SCIA2492E

AT-252
ON-VEHICLE SERVICE
Revision: August 20072004 QX56
Rear Oil SealUCS002JC
REMOVAL AND INSTALLATION
Removal
1. Remove rear propeller shaft.Refer to PR-9, "REMOVAL" .
2. Remove transfer from transmission (4WD models). Refer to TF-
109, "REMOVAL AND INSTALLATION" .
3. Remove rear oil seal using a flat-bladed screwdriver.
CAUTION:
Be careful not to scratch rear extension assembly (2WD
models) or adapter case assembly (4WD models).
Installation
CAUTION:
After completing installation, check fluid leakage and fluid level. Refer to AT-1 3, "
Changing A/T Fluid"
,AT- 1 3 , "Checking A/T Fluid" .
1. As shown below, use a drift to drive rear oil seal into the exten-
sion case (2WD models) or adapter case (4WD models) until it
is flush.
CAUTION:

Apply ATF to rear oil seal.

Do not reuse rear oil seal
2. Install transfer to transmission (4WD models). Refer to TF-109,
"REMOVAL AND INSTALLATION" .
3. Install rear propeller shaft. Refer to PR-9, "
INSTALLATION" .
SCIA5254E
SCIA5255E

AIR BREATHER HOSE
AT-253
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Revision: August 20072004 QX56
AIR BREATHER HOSEPFP:31098
Removal and InstallationUCS002JD
4X2
Refer to the figure below for air breather hose removal and installation procedure.
CAUTION:

When installing an air breather hose, be careful not to be crushed or blocked by folding or bend-
ing the hose.

When inserting a hose to the transmission tube, be sure to insert it fully until its end reaches the
tube bend portion.
LCIA0331E

AT-254
AIR BREATHER HOSE
Revision: August 20072004 QX56
4X4
Refer to the figure below for air breather hose removal and installation procedure.
CAUTION:

When installing an air breather hose, be careful not to be crushed or blocked by folding or bend-
ing the hose.

When inserting a hose to the transmission tube, be sure to insert it fully until its end reaches the
tube bend portion.
LCIA0332E

TRANSMISSION ASSEMBLY
AT-255
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Revision: August 20072004 QX56
TRANSMISSION ASSEMBLYPFP:31020
Removal and Installation (4x2)UCS002J E
COMPONENTS
REMOVAL
CAUTION:
When removing the A/T assembly from engine, first remove the crankshaft position sensor (POS) from
the A/T assembly.
Be careful not to damage sensor edge.
1. Disconnect the negative battery terminal.
2. Remove engine cover.
3. Remove A/T fluid indicator gauge.
4. Remove engine under cover with power tool.
5. Remove exhaust front tube and center muffler with power tool. Refer to EX-3, "
Removal and Installation" .
6. Remove rear propeller shaft. Refer to PR-9, "
REMOVAL" .
7. Remove A/T control cable. Refer to AT- 2 3 3 , "
SHIFT CONTROL SYSTEM" .
1. A/T fluid indicator pipe 2. A/T fluid indicator 3. O-ring
4. Transmission assembly 5. Fluid cooler tube 6. A/T cross member
7. Insulator 8. Copper washers
LCIA0333E

AT-256
TRANSMISSION ASSEMBLY
Revision: August 20072004 QX56
8. Remove crankshaft position sensor (POS) from A/T assembly.
9. Remove fluid cooler tube.
10. Remove dust cover from converter housing part.
11. Turn crankshaft, and remove the four tightening bolts for drive
plate and torque converter.
CAUTION:
When turning crankshaft, turn it clockwise as viewed from
the front of the engine.
12. Support A/T assembly with a transmission jack.
CAUTION:
When setting the transmission jack, be careful not to allow
it to collide against the drain plug.
13. Remove cross member with power tool.
14. Remove air breather hose. Refer to AT-253, "
Removal and
Installation" .
15. Disconnect A/T assembly connector.
16. Remove A/T fluid indicator pipe from A/T assembly.
17. Plug up openings such as the fluid charging pipe hole, etc.
18. Remove the A/T assembly to engine bolts with power tool.
19. Remove A/T assembly from vehicle using Tool and a transmis-
sion jack.

Secure torque converter to prevent it from dropping.

Secure A/T assembly to a transmission jack.
INSPECTION
Installation and Inspection of Torque Converter

After inserting a torque converter to a transmission, be sure to
check dimension A to ensure it is within the reference value
limit.
LCIA0334E
Tool number : — (J-47002)
LCIA0335E
SCIA0499E
Dimension A : 24.0 mm (0.94 in) or more
SAT0 1 7B

TRANSMISSION ASSEMBLY
AT-257
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INSTALLATION
Installation of the remaining components is in the reverse order of
the removal, while paying attention to the following work.

If removed install drive plate.
–Align dowel pin of crankshaft rear end with pin holes of each
parts to install.
–Install drive plate, reinforcement plate and pilot converter as
shown.
–Face chamfered or rounded edge side to crankshaft.
CAUTION:

When replacing an engine or transmission you must make
sure the dowels are installed correctly during re-assembly.

Improper alignment caused by missing dowels may cause
vibration, oil leaks or breakage of drivetrain components.

When installing transmission to the engine, attach the bolts in
accordance with the following standard.
*: No.2 bolt also secures air breather vent.
–Align the positions of tightening bolts for drive plate with those of
the torque converter, and temporarily tighten the bolts. Then,
tighten the bolts with the specified torque.
CAUTION:

When turning crankshaft, turn it clockwise as viewed from the front of the engine.

After converter is installed to drive plate, rotate crankshaft several turns and check to be sure that
transmission rotates freely without binding.

After completing installation, check fluid leakage, fluid level, and the positions of A/T. Refer to AT-13,
"Checking A/T Fluid" , AT-234, "Checking of A/T Position" , AT-234, "Adjustment of A/T Position" .
KBIA2494E
KBIA2537E
Bolt No. 1 2* 3
Number of bolts 4 1 4
Bolt length
“”mm (in)70 (2.76) 70 (2.76) 70 (2.76)
Tightening torque
N·m (kg-m, ft-lb)11 3
(12, 83)11 3
(12, 83)
LCIA0371E
LCIA0335E

AT-258
TRANSMISSION ASSEMBLY
Revision: August 20072004 QX56
Removal and Installation (4x4) UCS002J F
COMPONENTS
REMOVAL
CAUTION:
When removing the A/T assembly from engine, first remove the crankshaft position sensor (POS) from
the A/T assembly.
Be careful not to damage sensor edge.
1. Disconnect the negative battery terminal.
2. Remove engine cover with power tool.
3. Remove A/T fluid indicator.
4. Remove engine under cover with power tool.
5. Remove exhaust front tube and center muffler with power tool. Refer to EX-3, "
Removal and Installation" .
6. Remove propeller shaft. Refer to PR-5, "
REMOVAL" (front), or PR-9, "REMOVAL" (rear).
7. Remove A/T control cable. Refer to AT-233, "
SHIFT CONTROL SYSTEM" .
1. A/T fluid indicator pipe 2. A/T fluid indicator 3. O-ring
4. Transmission assembly 5. Fluid cooler tube 6. Copper washer
7. A/T cross member 8. Insulator
WCIA0257E

TRANSMISSION ASSEMBLY
AT-259
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Revision: August 20072004 QX56
8. Remove crankshaft position sensor (POS) from A/T assembly.
9. Disconnect A/T fluid cooler tube from A/T assembly.
10. Remove dust cover from converter housing part.
11. Turn crankshaft, and remove the four tightening bolts for drive
plate and torque converter.
CAUTION:
When turning crankshaft, turn it clockwise as viewed from
the front of the engine.
12. Support A/T assembly with a transmission jack.
CAUTION:
When setting the transmission jack, be careful not to allow
it to collide against the drain plug.
13. Remove cross member with power tool.
14. Tilt the transmission slightly to keep the clearance between body
and transmission, and then disconnect air breather hose from charging pipe. Refer to AT- 2 5 3 , "
Removal
and Installation" .
15. Disconnect A/T assembly connector and transfer unit connector.
16. Remove A/T fluid indicator pipe.
17. Plug up openings such as the fluid charging pipe hole, etc.
18. Remove A/T assembly to engine bolts with power tool.
19. Remove A/T assembly from vehicle using Tool and a transmis-
sion jack.

Secure torque converter to prevent it from dropping.

Secure A/T assembly to a transmission jack.
NOTE:
The actual special service Tool may differ from Tool shown.
20. Remove transfer from A/T assembly. Refer to TF-109,
"REMOVAL AND INSTALLATION" .
INSPECTION
Installation and Inspection of Torque Converter

After inserting a torque converter to a transmission, be sure to
check dimension A to ensure it is within the reference value
limit.
LCIA0334E
Tool number : — (J-47002)
LCIA0335E
SCIA0499E
Dimension A : 24.0 mm (0.94 in) or more
SAT0 1 7B