2011 INFINITI QX56 transmission

TM-174
< SYMPTOM DIAGNOSIS >[7AT: RE7R01B]
SYSTEM SYMPTOM
*: Parts behind drum support is impossible to perform inspection by disassembly. Refer to
TM-16, "TRANSMISSION : Cross-Sectional
View".Symptom
Diagnostic item
Oil pump
Torque converter
Low brake*
Front brake
High and low reverse clutch
Input clutch
Direct clutch
2346 brake
Reverse brake
gear
1st one-way clutch
2nd one-way clutch
control valve
Parking component
TM-270
TM-211TM-211TM-211TM-292TM-282TM-294TM-270TM-211TM-211TM-287TM-211TM-182TM-211
Function
trouble
Power trans-
mission cannot
be performed
Vehicle cannot run in all position. 1 1 2 1 1 1 1 1 1 2 1
Driving is not possible in “D” posi-
tion.
11211111 11121
Driving is not possible in “R” posi-
tion. 1 111121
Engine stall 1
Engine stalls when selector lever
shifted “N” → “D” or “R”. 1
Engine does not start in “N” or “P”
position. 1
Engine starts in position other
than “N” or “P”.
Poor operation Vehicle does not enter parking
condition.
1
Parking condition is not cancelled. 1
Vehicle runs with A/T in “P” posi-
tion. 2111111 21
Vehicle moves forward with the
“R” position. 211111 2
Vehicle runs with A/T in “N” posi-
tion. 2111111 2
Vehicle moves backward with the
“D” position. 12
Revision: 2010 May2011 QX56

TM-184
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
CONTROL VALVE & TCM
9. Remove bolts and clip (1) from the control valve & TCM.
*: Reamer bolt
10. Remove the control valve & TCM from transmission case.
CAUTION:
When removing, be careful wi th the manual valve (1) notch
and manual plate (2) height. Remove it vertically.
11. Remove joint connector (1) from the control valve & TCM using a flat-bladed screwdriver (A).
12. Disconnect TCM connector (A). CAUTION:
Be careful not to damage connector.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
 Be careful not to damage connector when installing any connector.
 Never reuse joint connector.
 Apply ATF to O-ring of joint connector.
 Never reuse drain plug and drain plug gasket. In addition, install new drain plug and drain plug gas-
ket after adjustment of A/T fluid filling.
 Refer to the following when installing the control valve & TCM to transmission case.
: Vehicle 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
JPDIA0012ZZ
JSDIA1718ZZ
JSDIA1813ZZ
Revision: 2010 May2011 QX56

CONTROL VALVE & TCMTM-185
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
CAUTION:
 Make sure that turbine revolution sensor securely installs input speed sensor holes (A).
 Hang down output speed senso r harness toward outside so
as not to disturb installation of the control valve & TCM.
 Adjust A/T assembly harness connector of the control valve
& TCM to terminal hole of transmission case.
 Assemble it so that manual valve (1) cutout is engaged with manual plate (2) projection.
- 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
 Refer to the following when installing oil pan to transmission case.CAUTION:
 Clean foreign materials (gear wear particles) that adhere on the inside of the oil pan and on the
magnet, and then assembly.
 Completely remove all moisture, oil and old gasket, etc. from oil pan gasket mounting surface of
transmission case and oil pan.
 Never reuse oil pan gasket and oil pan mounting bolts.
 Install oil pan gasket in the di rection to align hole position.
- Tighten the oil pan mounting bolts to the specified torque in the numerical order as shown in the figure after temporarily tightening
them.
JPDIA1106ZZ
JPDIA0012ZZ
: Vehicle 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
: Vehicle front
JPDIA1105ZZ
JSDIA1592GB
Revision: 2010 May2011 QX56

PARKING COMPONENTSTM-187
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
PARKING COMPONENTS
2WD
2WD : Exploded ViewINFOID:0000000006233258
2WD : Removal and InstallationINFOID:0000000006233259
REMOVAL
1. Drain ATF through drain plug.
2. Separate propeller shaft assembly. Refer to DLN-143, "
Exploded View".
3. Support A/T assembly with a transmission jack. CAUTION:
When setting transmission jack, be careful not to allow it to collide against the drain plug.
4. Remove rear engine mounting cross member with power tool. Refer to TM-205, "
2WD : Exploded View".
5. Remove engine mounting insulator (rear). Refer to TM-205, "
2WD : Exploded View".
1. Parking actuator support 2. Parking pawl 3. Return spring
4. Pawl shaft 5. Parking gear 6. Seal ring
7. Output shaft 8. Bearing race 9. Needle bearing
10. Self-sealing bolt 11. Bracket 12. Rear extension
*: Apply Genuine Anaerobic Liquid Gasket or equivalent. Refer to GI-22, "Recommended Chemical Products and Sealants".
Refer to GI-4, "
Components" for symbols not described on the above.
JSDIA1926GB
Revision: 2010 May2011 QX56

TM-188
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
PARKING COMPONENTS
6. Remove tightening bolts for rear extension assembly and trans-
mission case.
7. Tap rear extension assembly with a soft hammer (A). CAUTION:
Be careful not to damage rear extension case.
8. Remove rear extension assembly (with needle bearing) from transmission case.
9. Remove bearing race (1) from output shaft (2).
10. Remove output shaft (1) from transmission case by rotating left/ right.
1: Bracket
A: Bolt
B : Self-sealing bolt
JSDIA1845ZZ
JPDIA0027ZZ
SCIA3431E
JPDIA0057ZZ
JPDIA0028ZZ
Revision: 2010 May2011 QX56

TM-190
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
PARKING COMPONENTS
16. Remove return spring (1) from parking pawl (2).
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
 Never reuse seal rings and drain plug gasket.
 Apply petroleum jelly to n
eedle bearing and seal rings.
 Insert the tip of parking rod between the parki ng pawl and the parking actuator support when assem-
bling the rear extension assembly.
 Refer to the followings installing rear extension assembly.
- Apply recommended sealant (Genuine Anaerobic Liquid Gasket or
equivalent. Refer to GI-22, "
Recommended Chemical Products
and Sealants".) to rear extension assembly as shown in the figure.
CAUTION:
Completely remove all moisture, oil and old sealant, etc. from
the transmission case and rear extension assembly mounting
surfaces.
- Tighten rear extension assembly bolts to the specified torque.
2WD : InspectionINFOID:0000000006233260
INSPECTION AFTER REMOVAL
SCIA6180J
Sealant starting
point and end-
point (A) : Start and finish
point shall be in
the center of two bolts.
Overlap width of
sealant starting
point and end-
point (B) : 3 – 5 mm (0.12 – 0.20 in)
Sealant width (C) : 1.0 – 2.0 mm (0.04 – 0.08 in)
Sealant height (C) : 0.4 – 1.0 mm (0.016 – 0.04 in)
JSDIA1855ZZ
1: Bracket
A: Bolt
B : Self-sealing bolt
JSDIA1845ZZ
Revision: 2010 May2011 QX56

TM-196
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
OUTPUT SPEED SENSOR
4. Remove clips (1).
5. Remove oil pan (2) and oil pan gasket.
6. Support A/T assembly with a transmission jack.
CAUTION:
When setting transmission j ack, place wooden blocks to
prevent from damaging control valve & TCM and transmis-
sion case.
7. Remove rear engine mounting cross member with power tool. Refer to TM-205, "
2WD : Exploded View".
8. Remove engine mounting insulator (rear). Refer to TM-205, "
2WD : Exploded View".
9. Remove tightening bolts for rear extension assembly and trans- mission case.
10. Tap rear extension assembly with a soft hammer (A). CAUTION:
Be careful not to damage rear extension case.
11. Remove rear extension assembly (with needle bearing) from transmission case.
: Vehicle front
: Oil pan mounting bolt
1 : Bracket
A: Bolt
B : Self-sealing bolt
JSDIA1591ZZ
JSDIA1845ZZ
JPDIA0027ZZ
SCIA3431E
Revision: 2010 May2011 QX56

OUTPUT SPEED SENSORTM-197
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
12. Disconnect output speed sensor connector (A). CAUTION:
Be careful not to damage connector
13. Disengage terminal clips ( ).
14. Remove output speed sensor (1) from transmission case.
CAUTION:
 Never subject it to impact by dropping or hitting it.
 Never disassemble.
 Never allow metal filings, etc. to get on the sensor's frontedge magnetic area.
 Never place in an area affected by magnetism.
INSTALLATION
Note the following, and install in the reverse order removal.
CAUTION:
 Insert the tip of parking rod between the parkin g pole and the parking actuator support when assem-
bling the rear ext ension assembly.
 Never reuse drain plug gasket.
 Refer to the followings when installing output speed sensor.
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.
 Refer to the followings when installing rear extension assembly.
- Apply recommended sealant (Genuine Anaerobic Liquid Gasket or equivalent. Refer to GI-22, "
Recommended Chemical Products
and Sealants".) to rear extension assembly as shown in the figure.
CAUTION:
Completely remove all moisture, oil and old sealant, etc. from
transmission case and rear extension assembly mounting
surfaces.
JPDIA1104ZZ
: Bolt
JSDIA1885ZZ
Sealant starting
point and end-
point (A) : Start and finish point shall be in
the center of two bolts.
Overlap width of
sealant starting
point and end-
point (B) : 3 – 5 mm (0.12 – 0.20 in)
Sealant width (C) : 1.0 – 2.0 mm (0.04 – 0.08 in)
Sealant height (C) : 0.4 – 1.0 mm (0.016 – 0.04 in)
JSDIA1855ZZ
Revision: 2010 May2011 QX56