INFINITI QX56 2011 Factory Service Manual

TRANSMISSION ASSEMBLYTM-263
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55. Install under drive sun gear (with needle bearing) (1) to oil pump assembly (2).
56. Install oil pump assembly (with under drive sun gear) to trans- mission case.
CAUTION:
Apply ATF to oil pump bearing.
57. Apply recommended sealant to oil pump assembly as shown in the figure.
CAUTION:
Completely remove all moisture, oil and old sealant, etc.
from the oil pump mounting bolts and oil pump mounting
bolt mounting surfaces.
58. Tighten oil pump bolts ( ) to the specified torque. CAUTION:
Apply ATF to oil pump bushing.
59. Install O-ring to input clutch assembly.
JSDIA1712ZZ
SCIA2811E
: Genuine RTV silicone sealant or equivalent. Refer to
GI-22, "
Recommended Chemical Products and Seal-
ants".
JSDIA1720ZZ
JPDIA1108ZZ
SCIA5011E
Revision: 2010 May2011 QX56

TM-264
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
60. Install converter housing to transmission case, and tighten con-
verter housing bolts ( ) to the specified torque.
61. Connect TCM connector (A).
62. Install joint connector (1) to the control valve & TCM. CAUTION:
Apply ATF to O-ring of joint connector.
63. Install the control valve & TCM (1) to transmission case.
CAUTION:
JPDIA1107ZZ
JSDIA1813ZZ
JSDIA1719ZZ
JSDIA1823ZZ
Revision: 2010 May2011 QX56

TRANSMISSION ASSEMBLYTM-265
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 Make sure that input speed sen sor securely installs input
speed sensor holes (A).
 Hang down output speed sensor harness toward outside
so as not to disturb installa tion of the control valve &
TCM.
 Adjust A/T assembly harness connector of the control
valve & TCM to terminal ho le of transmission case.
 Assemble it so that manual valve cutout is engaged with manual plate projection.
64. Install bolts and clip (1) to the control valve & TCM. Tighten bolt (E) to the specified torque before tightening the other than bolts.
*: Reamer bolt
65. Connect output speed sensor connector (A).
66. Engage output speed sensor harness with terminal clips ( ).
JPDIA1106ZZ
SCIA5035E
: 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
JPDIA1105ZZ
JPDIA1104ZZ
Revision: 2010 May2011 QX56

TM-266
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
67. Pull down joint connector (1).
CAUTION:
Be careful not to damage connector.
68. Install snap ring (1) to joint connector (2).
69. Install magnets (1) in oil pan.
70. Install oil pan gasket to transmission case. CAUTION:
 Never reuse oil pan gasket.
 Install it in the direction to align hole positions.
 Completely remove all moisture, oil and old gasket, etc.from oil pan gasket mounting surface.
71. Install oil pan (2) and clips (1) to transmission case. CAUTION:
 Be careful not to pinch harnesses.
 Completely remove all moisture, oil and old gasket, etc.from oil pan mounting surface.
72. Tighten oil pan mounting bolts to the specified torque in numeri- cal order shown in the figure after temporarily tightening them.
Tighten oil pan mounting bolts to the specified torque.
CAUTION:
Never reuse oil pan mounting bolts.
73. Install drain plug to oil pan. Tighten drain plug to the specified torque.
CAUTION:
Never reuse drain plug gasket.
JSDIA1764ZZ
JSDIA1765ZZ
JPDIA0009ZZ
: Front
: Oil pan mounting bolt
JSDIA1591ZZ
: Front
JSDIA1592GB
Revision: 2010 May2011 QX56

TRANSMISSION ASSEMBLYTM-267
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74. Pour ATF into torque converter. Approximately 2 liter (2-1/8 US qt, 1-3/4 Imp qt) of ATF is
required for a new torque converter.
 When reusing old torque co nverter, add the same amount
of ATF as was drained.
75. Install torque converter while aligning notches of torque con- verter with notches of oil pump.
CAUTION:
Install torque converte r while rotating it.
76. Measure dimension “A” to make sure that torque converter is in proper position.
InspectionINFOID:0000000006226919
INSPECTION AFTER REMOVAL
Oil Pan
Check foreign materials in oil pan to help determine causes of mal-
function. If the ATF is very dark, smells burned, or contains foreign
particles, the frictional material (clutches, band) may need replace-
ment. A tacky film that will not wipe clean indicates varnish build up.
Varnish can cause valves, servo, and clutches to stick and can
inhibit pump pressure.
If frictional material is detected, perform A/T fluid cooler
cleaning. Refer to TM-97, "
Cleaning".
Torque Converter
SAT428DA
SCIA5010E
B: Scale
C : Straightedge
Dimension “A” : Refer to TM-297, "Torque Converter".
JPDIA0042ZZ
SCIA5199E
Revision: 2010 May2011 QX56

TM-268
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
Check torque converter one-way clutch using a check tool as shown
at figure.
1. Insert a check tool into the groove of bearing support built into
one-way clutch outer race.
2. When fixing bearing support with a check tool, rotate one-way clutch spline using a screwdriver.
3. Make sure that inner race rotates clockwise only. If not, replace
torque converter assembly.
1st One-way Clutch
Check operation of 1st one-way clutch.
1. Install 1st one-way clutch (1) to front brake hub (with under drivecarrier).
2. Hold 1st one-way clutch.
3. Check front brake hub for correct locking and unlocking direc- tions. If necessary, replace 1st one-way clutch.
Under Drive Sun Gear
Check for deformation, fatigue or damage. If necessary, replace the under drive sun gear.
Mid Carrier Assembly
Check for deformation, fatigue or damage. If necessary, replace the mid carrier assembly.
Rear Carrier Assembly
Check for deformation, fatigue or damage. If necessary, replace the rear carrier assembly.
Reverse Brake Drive Plates
Check facing for burns, cracks or damage. If necessary, replace the plate.
Reverse Brake Retaining Plate, Driven Plates and Dish Plates
Check facing for burns, cracks or damage. If necessary, replace the plate.
Each Snap Ring
Check for deformation, fatigue or damage. If necessary, replace the snap ring.
Parking Actuator Support and Parking Pawl
SCIA3171E
: Unlocked
: Locked
JSDIA1713ZZ
Revision: 2010 May2011 QX56

TRANSMISSION ASSEMBLYTM-269
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If the contact surface on parking actuator support and parking pawl
has excessive wear, abrasion, bend or any other damage, replace
the components.
SCIA5143E
SCIA5144E
Revision: 2010 May2011 QX56

TM-270
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
OIL PUMP, 2346 BRAKE, FRONT BRAKE PISTON
OIL PUMP, 2346 BRAKE, FRONT BRAKE PISTON
Exploded ViewINFOID:0000000006226920
DisassemblyINFOID:0000000006226921
1. Remove snap ring (1) from oil pump assembly using a flat-
bladed screwdriver (A).
CAUTION:
 Be careful not to scratch oil pump cover and 2346 brakeretaining plate.
 Be careful not to damage snap ring.
1. Oil pump housing oil seal 2. Oil pump housing 3. O-ring
4. Oil pump cover 5. O-ring 6. D-ring
7. D-ring 8. Front brake piston 9. Front brake spring retainer
10. Snap ring 11. D-ring 12. D-ring
13. 2346 brake piston 14. 2346 brake spring retainer 15. Snap ring
16. Seal ring 17. Dish plate 18. Driven plate
19. Drive plate 20. Retaining plate 21. Snap ring
: Apply Liquid Gasket (Three Bond 1215) or equivalent.
Refer to GI-4, "
Components" for symbols not described on the above.
JPDIA1089GB
JPDIA1090ZZ
Revision: 2010 May2011 QX56

OIL PUMP, 2346 BRAKE, FRONT BRAKE PISTONTM-271
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2. Remove 2346 brake component part (retaining plate, drive plate, driven plate, and dish pl ate) (1) from oil pump assembly.
3. Remove seal ring (1) from oil pump assembly.
4. Set the clutch spring compressor (SST: KV31103800) (A) on front brake spring retainer and remove snap ring (fixing front
brake spring retainer) (1) from oil pump assembly while com-
pressing return spring.
CAUTION:
Be careful not to expand snap ring excessively.
5. Remove front brake spring retainer (1) from oil pump assembly.
6. Set the clutch spring compressor [SST: KV31102400 (J-34285 and J-34285-87)] (A) on 2346 brake spring retainer and remove
snap ring (fixing 2346 brake spring retainer) (1) from oil pump
assembly while compressing return spring.
CAUTION:
Be careful not to expand snap ring excessively.
JPDIA1091ZZ
JPDIA1092ZZ
JSDIA1729ZZ
JPDIA1094ZZ
B: Press
JSDIA1730ZZ
Revision: 2010 May2011 QX56

TM-272
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
OIL PUMP, 2346 BRAKE, FRONT BRAKE PISTON
7. Remove 2346 brake spring retainer (1) from oil pump assembly.
8. Remove front brake piston (1) from oil pump assembly with
compressed air. Refer to TM-222, "
Oil Channel".
CAUTION:
Care should be taken not to ab ruptly blow air. It makes pis-
ton incline, as the result, it becomes hard to disassemble
the piston.
9. Remove D-ring (inner) (1) and D-ring (outer) (2) from front brake piston.
JPDIA1096ZZ
A : Front brake pressure hole
JPDIA1097ZZ
JPDIA1098ZZ
Revision: 2010 May2011 QX56