4WD INFINITI QX56 2011 Factory Service Manual

TM-194
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
REAR OIL SEAL
 As shown in the figure, use the drift [64 mm (2.52 in) dia. commer-
cial service tool] (A) to drive rear oil seal into adapter case assem-
bly until it is flush.
CAUTION:
 Never reuse rear oil seal.
 Apply ATF to rear oil seal.
4WD : Inspection and AdjustmentINFOID:0000000006226904
INSPECTION AFTER INSTALLATION
Check A/T fluid leakage. Refer to TM-175, "Inspection".
ADJUSTMENT AFTER INSTALLATION
Adjust A/T fluid level. Refer to TM-95, "Adjustment".
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Revision: 2010 May2011 QX56

TM-200
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
AIR BREATHER HOSE
 To fix A/T air breather hose (1) to the clip (2), face the A/T air
breather hose paint mark (A) upward and observe the installa-
tion position shown in the figure.
4WD
4WD : Exploded ViewINFOID:0000000006226905
4WD : Removal and InstallationINFOID:0000000006226906
REMOVAL
1. Separate propeller shaft assembly (front). Refer to DLN-129, "Removal and Installation".
2. Remove A/T air breather hose.
3. Remove air breather box from A/T air breather hose.
4. Remove transfer air breather hose. Refer to DLN-121, "
Removal and Installation".
5. Remove clips from bracket.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
 Never bend the A/T air breather hose to prevent damage to the hose.
 Insert A/T air breather hose to air breather tu be all the way to the curve of the tube.
 Install A/T air breather hose to A/T air breather tube so that the paint mark is facing upward.
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1. Air breather cap 2. Clip 3. Bracket
4. A/T assembly 5. A/T air breather hose 6. A/T air breather tube
A. Tightening must be done following the installation procedure. Refer to TM-208, "
4WD : Removal and Installation".
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Revision: 2010 May2011 QX56

TRANSMISSION ASSEMBLYTM-207
< UNIT REMOVAL AND INSTALLATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
 When installing A/T assembly to the engine, be sure to check dimension “A” to ensure it is within the reference value limit.
 When installing A/T assembly to the engine, attach the fixing bolts in accordance with the following standard.
*: Tightening the bolt with bracket (and washer). Refer to TM-199, "2WD : Exploded View".
 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.
 When tightening the tightening bolts for the torq ue converter after fixing the crankshaft pulley
bolts, be sure to confirm the tightening torque of the crankshaft pulley mounting bolts. Refer to
EM-62, "
Removal and Installation".
 Rotate crankshaft several turns and check to be sure that A/T rotates freely without binding after
converter is installed to drive plate.
2WD : Inspection and AdjustmentINFOID:0000000006233265
INSPECTION AFTER INSTALLATION
 Check A/T fluid leakage. Refer to TM-175, "Inspection".
 Check A/T position after adjusting A/T position. Refer to TM-101, "
Inspection".
ADJUSTMENT AFTER INSTALLATION
 Adjust A/T fluid level. Refer to TM-95, "Adjustment".
 Adjust A/T position. Refer to TM-101, "
Adjustment".
 Perform decel G sensor calibration when replacing A/T assembly. Refer to TM-91, "
Special Repair Require-
ment".
4WD
B: Scale
C : Straightedge
Dimension “A” : Refer to TM-297, "Torque Convert-
er".
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Bolt symbol A
Insertion direction A/T assembly to engine
Number of bolts 9
Bolt length “L”
mm (in) 70 (2.76)
Tightening torque
N·m (kg-m, ft-lb) 113 (12, 83)
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Revision: 2010 May2011 QX56

TM-208
< UNIT REMOVAL AND INSTALLATION >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
4WD : Exploded View
INFOID:0000000006226910
4WD : Removal and InstallationINFOID:0000000006226911
REMOVAL
CAUTION:
 When removing the A/T assembly from engine, fi rst remove the crankshaft position sensor (POS)
from the A/T assembly.
 Be careful not to damage sensor edge.
1. Shift the selector lever to “P” pos ition, and release the parking brake.
2. Disconnect the battery cable from the negative terminal.
3. Remove control cable from A/T assembly. Refer to TM-178, "
Removal and Installation".
4. Disconnect heated oxygen sensor 2 connectors (bank 1 and bank 2). Refer to EX-5, "
Exploded View".
5. Remove exhaust front tube (RH and LH) and main muffler. Refer to EX-5, "
Exploded View".
6. 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 and
overflow plug.
7. Remove rear engine mounting cross member and engine mounting insulator (rear).
8. Separate propeller shaft assembly (front). Refer to DLN-129, "
Removal and Installation".
9. Separate propeller shaft assembly (rear). Refer to DLN-137, "
Removal and Installation".
10. Remove front under cover with a power tool. Refer to EXT-25, "
Removal and Installation".
11. Remove front suspension rear cross member.
1. A/T assembly 2. Front suspension rear cross mem- ber3. Rear engine mounting cross
member
4. Engine mounting insulator (rear)
A. Tightening must be done following the installation procedure. Refer to TM-208, "
4WD : Removal and Installation".
Refer to GI-4, "
Components" for symbols in the figure.
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Revision: 2010 May2011 QX56

TRANSMISSION ASSEMBLYTM-209
< UNIT REMOVAL AND INSTALLATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
12. Remove crankshaft position sensor (POS) from A/T assembly. Refer to EM-106, "Exploded View".
CAUTION:
 Never subject it to impact by dropping or hitting it.
 Never disassemble.
 Never allow metal filings, etc. to get on the sensor's front edge magnetic area.
 Never place in an area affected by magnetism.
13. Remove rear plate cover. Refer to EM-54, "
Exploded View".
14. Turn crankshaft, and remove the four tightening bolts for drive plate and torque converter. CAUTION:
When turning the crankshaft, turn it clock wise as viewed from the front of the engine.
15. Remove A/T fluid cooler tube A and D. Refer to TM-202, "
Exploded View".
NOTE:
Cap or plug openings to prevent fluid from spilling.
16. Support transfer assembly with a transmission jack.
17. Remove bolts fixing A/T assembly to engine with a power tool.
18. Disconnect connectors from A/T assembly and transfer assembly.
19. Remove harness and brackets from A/T assembly and transfer assembly.
20. Remove A/T assembly with transfer assembly from the vehicle. CAUTION:
 Secure torque converter to prevent it from dropping.
 Secure A/T assembly to a transmission jack.
21. Remove air breather hoses and bracket. Refer to TM-200, "
4WD
: Exploded View" (for A/T) and DLN-121, "Removal and Installa-
tion" (for transfer).
22. Remove manual lever from A/T assembly. Refer to TM-178,
"Exploded View".
23. Remove transfer assembly from A/T assembly with power tool. Refer to DLN-121, "
Removal and Installation".
NOTE:
Cap or plug opening to prevent fluid from spilling.
INSTALLATION
Note the following, and Install in the reverse order of removal.
 Check fitting of dowel pin ( ).
 When installing A/T assembly to the engine, be sure to check dimension “A” to ensure it is within the reference value limit.
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B: Scale
C : Straightedge
Dimension “A” : Refer to TM-297, "Torque Convert-
er".
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Revision: 2010 May2011 QX56

TM-210
< UNIT REMOVAL AND INSTALLATION >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
 When installing A/T assembly to the engine, attach the fixing bolts
in accordance with the following standard.
*: Tightening the bolt with bracket (and washer). Refer to TM-200, "4WD : Exploded View".
 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 clockwi se as viewed from the front of the engine.
 When tightening the tightening bolts for the torque converter after fixing the crankshaft pulley
bolts, be sure to confirm the tightening torque of the crankshaft pulley mounting bolts. Refer to
EM-62, "
Removal and Installation".
 Rotate crankshaft several turns and check to be sure that A/T rotates freely without binding after
converter is installed to drive plate.
4WD : Inspection and AdjustmentINFOID:0000000006226912
INSPECTION AFTER INSTALLATION
 Check A/T fluid leakage.
 Check A/T position after adjusting A/T position. Refer to TM-101, "
Inspection".
ADJUSTMENT AFTER INSTALLATION
 Adjust A/T fluid level. Refer to TM-95, "Adjustment".
 Adjust A/T position. Refer to TM-101, "
Inspection".
 Perform decel G sensor calibration w hen replacing A/T assembly. Refer to TM-91, "
Special Repair Require-
ment".
Bolt symbol A
Insertion direction A/T assembly to engine
Number of bolts 9
Bolt length “L”
mm (in) 70 (2.76)
Tightening torque
N·m (kg-m, ft-lb) 113 (12, 83)
JSDIA1598ZZ
Revision: 2010 May2011 QX56

TM-216
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
4WD MODELS
13. Snap ring 14. Oil pan gasket 15. Oil pan
16. Clip 17. Oil pan mounting bolt 18. Overflow plug
19. Drain plug 20. Drain plug gasket 21. Magnet
22. Clip 23. Control valve & TCM 24. Joint connector
25. Transmission case 26. Retaining pin 27. Output speed sensor
28. Needle bearing 29. Parking gear 30. Seal ring
31. Output shaft 32. Bearing race
Refer to
GI-4, "
Components" for symbols in the figure.
1. Parking actuator support 2. Parking pawl 3. Pawl shaft
4. Return spring 5. Needle bearing 6. Rear extension
7. Self-sealing bolt 8. Rear oil seal 9. Bracket *: Apply Genuine Anaerobic Liquid Gasket or equivalent. Refer to GI-22, "
Recommended Chemical Products and Sealants".
Refer to GI-4, "
Components" for symbols in the figure.
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Revision: 2010 May2011 QX56

TM-224
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
4WD MODELS
L (17) Needle bearing 65 (2.559)
M (18) Bearing race 58 (2.362)
(19) Needle bearing 58 (2.283)
Location Item Outer diameter mm (in)
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Location Item Outer diameter mm (in)
A (1) Needle bearing 94 (3.701)
B (2) Bearing race
58.6 (2.307)
(3) Needle bearing 60 (2.362)
C (4) Needle bearing 84.6 (3.331)
D (5) Needle bearing 77 (3.031) E (6) Needle bearing 47 (1.850)
F (7) Needle bearing 84 (3.307)
(8) Bearing race 82 (3.228)
G (9) Needle bearing 80 (3.150) H (10) Needle bearing 92 (3.622)
Revision: 2010 May2011 QX56

TM-226
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
4WD MODELS
DisassemblyINFOID:0000000006226917
CAUTION:
Never disassemble parts behind
drum support. Refer to TM-16, "
TRANSMISSION : Cross-Sectional
View".
1. Drain ATF through drain plug.
12 B 135 (5.315)
13 A 48.4 (1.906)
Location Shape of snap ring Outer diameter mm (in)
Location Shape of snap ring Outer diameter mm (in)
1 A 159.9 (6.295)
2 B 159 (6.260)
3 B 216 (8.504)
4 B 180.4 (7.102)
5 C 171.5 (6.752)
6 B 169 (6.654)
7 B 180.5 (7.106)
8 B 181.0 (7.126)
9 D 64.6 (2.543)
10 B 136 (5.354) 11 E 70.5 (2.776)
12 B 135 (5.315)
13 A 48.4 (1.906)
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Revision: 2010 May2011 QX56

TM-234
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
38. Remove control valve & TCM mounting bolts and clip (1) from
the control valve & TCM.
*: Reamer bolt
39. Remove the control valve & TCM (1) from transmission case.CAUTION:
When removing, never with the manual valve notch and
manual plate height. Remove it vertically.
40. Remove joint connector (1) from the control valve & TCM using a flat-bladed screwdriver (A).
41. Disconnect TCM connector (A). CAUTION:
Be careful not to damage connector.
42. Remove rear extension assembly (2WD) or adapter ca se assembly (4WD) according to the following pro-
cedures.
a. 2WD
: Front
Bolt symbol Length mm (in) Number of bolts A 43 (1.69) 3
B 40 (1.57) 2
C 54 (2.13) 6
D 50 (1.97) 2
E* 50 (1.97) 1
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Revision: 2010 May2011 QX56