2008 INFINITI QX56 ECU

TM-208
< ON-VEHICLE REPAIR >
CONTROL VALVE WITH TCM
7. Install bolts (A), (B) and (C) in control valve with TCM.
8. Tighten bolt (1A), (2B) and (3A) temporarily to prevent disloca-tion. After that tighten them in order (1 → 2 → 3).
9. Tighten control valve with TCM bolts to the specified torque.
10. After installing the A/T fluid temperature sensor 2, connect the A/T fluid temperature sensor 2 connector
as shown below.
a. Connect A/T fluid temperature sensor 2 connector (A).
b. Securely fasten terminal cord assembly and A/T fluid tempera- ture sensor 2 harness with terminal clips ( ).
11. Connect output speed sensor connector. (1)
: Front
Bolt symbol Length mm (in) Number of bolts
A 42 (1.65) 5
B 55 (2.17) 6
C 40 (1.57) 1
SCIA8074E
: Front
Bolt symbol AB C
Number of bolts 56 1
Length mm (in) 42 (1.65) 55 (2.17)40 (1.57)
Tightening torque
N·m (km-g, in-lb) 7.9 (0.81, 70)With ATF applied
7.9 (0.81, 70)
SCIA8075E
SCIA8124E
JSDIA1319ZZ
Revision: March 2010 2008 QX56

CONTROL VALVE WITH TCMTM-209
< ON-VEHICLE REPAIR >
CEF
G H
I
J
K L
M A
B
TM
N
O P
12. Securely fasten output speed sensor (1) harness with terminal clip ( ).
13. Install oil pan to transmission case. Refer to TM-199, "
Oil Pan".
14. Pull up A/T assembly harness connector. CAUTION:
Do not damage connector.
15. Install snap ring to A/T assembly harness connector.
16. Connect A/T assembly harness connector.
17. Connect the negative battery terminal.
18. Refill the A/T with fluid and check the fluid level and for fluid leakage. Refer to TM-178, "
Checking the A/T Fluid (ATF)".
REMOVAL AND INSTALLATION OF A/T FLUID TEMPERATURE SENSOR 2
Removal
1. Disconnect negative battery terminal.
2. Remove oil pan and oil pan gasket. Refer to TM-199, "
Oil Pan".
3. Disconnect A/T fluid temperat ure sensor 2 connector (A).
CAUTION:
Do not damage connector.
4. Straighten terminal clip to free A/T fluid temperature sensor 2 harness.
JSDIA1316ZZ
SCIA5038E
SCIA5039E
SCIA8125E
Revision: March 2010 2008 QX56

CONTROL VALVE WITH TCMTM-211
< ON-VEHICLE REPAIR >
CEF
G H
I
J
K L
M A
B
TM
N
O P
3. Connect A/T fluid temperature sensor 2 connector (A).
4. Securely fasten A/T fluid temperature sensor 2 harness with ter- minal clip ( ).
5. Install oil pan to transmission case. Refer to TM-199, "
Oil Pan".
6. Connect the negative battery terminal.
7. Refill the A/T with fluid and check the fluid level and for fluid leakage. Refer to TM-178, "
Checking the A/T
Fluid (ATF)".
REMOVAL AND INSTALLATION OF PLUG
Removal
1. Disconnect negative battery terminal.
2. Remove oil pan and oil pan gasket. Refer to TM-199, "
Oil Pan".
3. Remove plug (1) with bracket (2) from control valve with TCM.
4. Remove bracket (1) from plug (2).
5. Remove O-ring (1) from plug (2).
Installation
CAUTION:
SCIA8125E
: Bolt
JSDIA1311ZZ
JSDIA1312ZZ
JSDIA1313ZZ
Revision: March 2010 2008 QX56

TRANSMISSION ASSEMBLYTM-215
< REMOVAL AND INSTALLATION >
CEF
G H
I
J
K L
M A
B
TM
N
O P
8. Remove crankshaft position sens or (POS) from A/T assembly.
CAUTION:
• Do not subject it to impact by dropping or hitting it.
• Do not disassemble.
• Do not allow metal filings or foreign material to get on the
sensor front edge magnetic area.
• Do not place in an area affected by magnetism.
9. Remove fluid cooler tube.
10. Remove dust cover from converter housing.
11. Turn crankshaft to access and remove the four 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 agai nst the drain plug.
13. Remove cross member using power tool.
14. Remove air breather hose. Refer to TM-197, "
Removal and
Installation".
15. Disconnect A/T assembly connector.
16. Remove A/T fluid indicator pipe from A/T assembly.
17. Plug any openings such as the A/T fluid indicator pipe hole.
18. Remove the A/T assembly to engine bolts using power tool.
19. Remove A/T assembly from vehicle using transmission jack. CAUTION:
• 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 specifications.
INSTALLATION
Installation of the remaining components is in the revers e order of the removal, while paying attention to the
following:
LCIA0334E
LCIA0335E
SCIA0499E
Dimension A : 24.0 mm (0.94 in) or more
SAT017B
Revision: March 2010 2008 QX56

TM-216
< REMOVAL AND INSTALLATION >
TRANSMISSION ASSEMBLY
• When installing transmission to the engine, attach the bolts in the order as shown.CAUTION:
• When replacing an engine or transmission you must make
sure the dowels are installe d correctly during re-assembly.
• Improper alignment caused by missing dowels may cause
vibration, oil leaks or breakage of drivetrain components.
NOTE:
*: No.2 bolt also secures air breather vent.
CAUTION:
• When turning crankshaft, turn it clockwi se as viewed from the front of the engine.
• After converter is installed to drive plate, rota te crankshaft several turns and check to be sure that
transmission rotates fr eely without binding.
NOTE:
• Align the positions of bolts for drive plate with those of the torque converter, and temporarily tighten the bolts. Then tighten the bolts
with the specified torque.
• Install crankshaft pos ition sensor (POS).
• After completing installation check fluid leakage, fluid level and the positions of A/T. Refer to TM-178, "
Checking the A/T Fluid (ATF)",
TM-194, "
Checking of A/T Position" and TM-194, "Adjustment of A/
T Position".
Removal and Installation (4WD)INFOID:0000000004917499
COMPONENTS
Transmission to engine bolts : 113 N·m (12 kg-m,
83 ft-lb)
LCIA0371E
LCIA0335E
Revision: March 2010 2008 QX56

TM-218
< REMOVAL AND INSTALLATION >
TRANSMISSION ASSEMBLY
8. Remove crankshaft position sensor (POS) from A/T assembly.CAUTION:
• Do not subject it to impact by dropping or hitting it.
• Do not disassemble.
• Do not allow metal filings or fo reign material to get on the
sensor's front edge magnetic area.
• Do not place in an area affected by magnetism.
9. Disconnect A/T fluid cooler tube from A/T assembly.
10. Remove dust cover from converter housing.
11. Turn crankshaft, and remove the four 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 using transmission jack and Tool. CAUTION:
When setting the transmission j ack, be careful not to allow
it to collide agai nst the drain plug.
NOTE:
The actual special service tool may differ from tool shown.
13. Remove cross member using power tool.
14. Remove air breather hose. Refer to TM-197, "
Removal and
Installation".
15. Disconnect A/T assembly connector and transfer unit connector.
16. Remove A/T fluid indicator pipe.
17. Plug any openings such as the fluid charging pipe hole.
18. Remove A/T assembly to engine bolts using power tool.
19. Remove A/T assembly with transfer from vehicle. CAUTION:
• Secure torque converter to prevent it from dropping.
• Secure A/T assembly to transmission jack.
20. Remove transfer from A/T assembly. Refer to DLN-139, "
Removal and Installation".
INSPECTION
Installation and Inspection of Torque Converter
LCIA0334E
LCIA0335E
Tool number : — (J-47002)
SCIA2203E
Revision: March 2010 2008 QX56

TRANSMISSION ASSEMBLYTM-219
< REMOVAL AND INSTALLATION >
CEF
G H
I
J
K L
M A
B
TM
N
O P
• After inserting a torque converter to a transmission, be sure to check dimension A to ensure it is within specifications.
INSTALLATION
Installation of the remaining components is in the revers e order of removal, while paying attention to the fol-
lowing:
• When installing transmission to the engine, attach the bolts as shown.
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.
NOTE:
*: No.2 bolt also secures air breather vent.
• Align the positions of bolts for dr ive 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.
• Install crankshaft position sensor (POS).
• After completing installation, check fluid leakage, fluid level, and the positions of A/T. Refer to TM-178, "
Checking the A/T Fluid
(ATF)", TM-194, "Checking of A/T Position" and TM-194, "Adjustment of A/T Position".
Dimension A : 24.0 mm (0.94 in) or more
SAT017B
Transmission to engine bolts : 113 N·m (12 kg-m,
83 ft-lb)
LCIA0371E
LCIA0335E
Revision: March 2010 2008 QX56

DISASSEMBLYTM-235
< DISASSEMBLY AND ASSEMBLY >
CEF
G H
I
J
K L
M A
B
TM
N
O P
14. Loosen lock nut and remove band servo anchor end pin from transmission case.
15. Remove brake band from transmission case.
CAUTION:
• To prevent brake linings from cracking or peeling, do not
stretch the flexible band unnecessarily. When removing
the brake band, always secure it with a clip as shown.
• Check brake band facing for damage, cracks, wear or
burns.
16. Remove mid carrier assembly and rear carrier assembly as a unit.
SCIA6512E
SCIA2580E
SAT655
SCIA5017E
Revision: March 2010 2008 QX56