2007 INFINITI QX56 rear hub assembly

AT-4
DTC Confirmation Procedure ................................152
Diagnosis Procedure .............................................152
DTC P1845 ATF PRESSURE SWITCH 5 ........154
Description .............................................................154
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
154
On Board Diagnosis Logic .....................................154
Possible Cause ......................................................154
DTC Confirmation Procedure ................................154
Diagnosis Procedure .............................................154
DTC P1846 ATF PRESSURE SWITCH 6 ........156
Description .............................................................156
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
156
On Board Diagnosis Logic .....................................156
Possible Cause ......................................................156
DTC Confirmation Procedure ................................156
Diagnosis Procedure .............................................156
MAIN POWER SUPPLY AND GROUND CIR-
CUIT .................................................................
158
Wiring Diagram - AT - MAIN ..................................158
Diagnosis Procedure .............................................159
CLOSED THROTTLE POSITION AND WIDE
OPEN THROTTLE POSITION CIRCUIT .........
161
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
161
Diagnosis Procedure .............................................161
BRAKE SIGNAL CIRCUIT ..............................162
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
162
Diagnosis Procedure .............................................162
TOW MODE SWITCH ......................................163
Description .............................................................163
Wiring Diagram - AT - TMSW ................................163
Diagnosis Procedure .............................................164
TROUBLE DIAGNOSIS FOR SYMPTOMS .....165
Wiring Diagram - AT - NONDTC ............................165
A/T Check Indicator Lamp Does Not Come On .....167
Engine Cannot Be Started in "P" or "N" Position ...168
In "P" Position, Vehicle Moves When Pushed .......168
In "N" Position, Vehicle Moves ..............................169
Large Shock ("N" to "D" Position) ..........................170
Vehicle Does Not Creep Backward in "R" Position ..172
Vehicle Does Not Creep Forward in "D" Position ..175
Vehicle Cannot Be Started from D1 .......................177
A/T Does Not Shift: D1→ D2 ..................................179
A/T Does Not Shift: D2→ D3 ..................................181
A/T Does Not Shift: D3→ D4 ..................................183
A/T Does Not Shift: D4→ D5 ..................................185
A/T Does Not Perform Lock-up .............................187
A/T Does Not Hold Lock-up Condition ...................189
Lock-up Is Not Released .......................................190
Engine Speed Does Not Return to Idle .................191
A/T Does Not Shift: 5th gear → 4th gear ..............192
A/T Does Not Shift: 4th gear → 3rd gear ..............194
A/T Does Not Shift: 3rd gear → 2nd gear .............196
A/T Does Not Shift: 2nd gear → 1st gear .............197
Vehicle Does Not Decelerate By Engine Brake ....199
A/T SHIFT LOCK SYSTEM ..............................202
Description ............................................................202
Shift Lock System Electrical Parts Location ..........202
Wiring Diagram - AT - SHIFT ................................203
Shift Lock Control Unit Reference Value ..............204
Component Inspection ..........................................204
SHIFT CONTROL SYSTEM .............................207
Control Device Removal and Installation ..............207
Adjustment of A/T Position ....................................208
Checking of A/T Position .......................................208
ON-VEHICLE SERVICE ...................................209
Oil Pan ..................................................................209
Control Valve with TCM and A/T Fluid Tempera-
ture Sensor 2 ........................................................
210
Rear Oil Seal .........................................................219
AIR BREATHER HOSE ....................................221
Removal and Installation .......................................221
TRANSMISSION ASSEMBLY ..........................223
Removal and Installation (2WD) ...........................223
Removal and Installation (4WD) ...........................225
OVERHAUL ......................................................228
Component ...........................................................228
Oil Channel ...........................................................235
Location of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ..........................
237
DISASSEMBLY ................................................240
Disassembly ..........................................................240
REPAIR FOR COMPONENT PARTS ..............258
Oil Pump ...............................................................258
Front Sun Gear, 3rd One-Way Clutch ...................260
Front Carrier, Input Clutch, Rear Internal Gear .....262
Mid Sun Gear, Rear Sun Gear, High and Low Re-
verse Clutch Hub ..................................................
267
High and Low Reverse Clutch ..............................272
Direct Clutch .........................................................274
ASSEMBLY ......................................................277
Assembly (1) .........................................................277
Adjustment ............................................................290
Assembly (2) .........................................................292
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
298
General Specification ............................................298
Vehicle Speed When Shifting Gears .....................298
Vehicle Speed When Performing and Releasing
Complete Lock-up .................................................
299
Stall Speed ............................................................299

OVERHAUL
AT-229
< SERVICE INFORMATION >
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10. Needle bearing 11. O-ring 12. Front carrier assembly
13. Needle bearing 14. Snap ring 15. Front sun gear
16. 3rd one-way clutch 17. Snap ring 18. Bearing race
19. Needle bearing 20. Seal ring 21. Input clutch assembly
22. Needle bearing 23. Rear internal gear 24. Brake band
25. Mid carrier assembly 26. Needle bearing 27. Bearing race
28. Rear carrier assembly 29. Needle bearing 30. Mid sun gear
31. Seal ring 32. Rear sun gear 33. 1st one-way clutch
34. Snap ring 35. Needle bearing 36. High and low reverse clutch hub
37. Snap ring 38. Bearing race 39. Needle bearing
Apply Genuine Silicone RTV or the equivalent. Refer to GI-45, "
Recommended Chemical Product and Sealant".

DISASSEMBLY
AT-245
< SERVICE INFORMATION >
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22. Remove mid sun gear assembly, rear sun gear assembly and
high and low reverse clutch hub as a unit.
CAUTION:
Be careful to remove them with bearing races and needle
bearing.
23. Remove high and low reverse clutch assembly from direct clutch
assembly.
CAUTION:
Make sure that needle bearing is installed to the high and
low reverse clutch assembly edge surface.
24. Remove direct clutch assembly from reverse brake.
25. Remove needle bearing from drum support edge surface.
26. Remove snap ring from A/T assembly harness connector.
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REPAIR FOR COMPONENT PARTS
AT-267
< SERVICE INFORMATION >
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2. Install front carrier assembly.
a. Install snap ring to front carrier assembly.
CAUTION:
Do not expand snap ring excessively.
b. Install needle bearing in front carrier assembly.
CAUTION:
• Take care with the direction of needle bearing. Refer to
AT-237, "
Location of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings".
• Apply petroleum jelly to needle bearing.
c. Install bearing race in front carrier assembly.
CAUTION:
Apply petroleum jelly to bearing race.
d. Install front carrier assembly to input clutch assembly.
3. Compress snap ring using suitable tool.
4. Install front carrier assembly and input clutch assembly to rear
internal gear.
Mid Sun Gear, Rear Sun Gear, High and Low Reverse Clutch HubINFOID:0000000003532490
COMPONENTS
SCIA5234E
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AT-268
< SERVICE INFORMATION >
REPAIR FOR COMPONENT PARTS
DISASSEMBLY
1. Remove needle bearing and bearing races from high and low
reverse clutch hub.
2. Remove snap ring from mid sun gear assembly using suitable
tool.
CAUTION:
Do not expand snap ring excessively.
1. Needle bearing 2. Bearing race 3. Snap ring
4. High and low reverse clutch hub 5. Needle bearing 6. Snap ring
7. 1st one-way clutch 8. Rear sun gear 9. Seal ring
10. Mid sun gear
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SCIA5238E
SCIA2855E

REPAIR FOR COMPONENT PARTS
AT-269
< SERVICE INFORMATION >
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3. Remove high and low reverse clutch hub from mid sun gear
assembly.
a. Remove needle bearing from high and low reverse clutch hub.
4. Remove rear sun gear assembly from mid sun gear assembly.
a. Remove snap ring from rear sun gear using suitable tool.
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SCIA2859E

AT-270
< SERVICE INFORMATION >
REPAIR FOR COMPONENT PARTS
b. Remove 1st one-way clutch from rear sun gear.
5. Remove seal rings from mid sun gear.
INSPECTION
High and Low Reverse Clutch Hub Snap Ring, Rear Sun Gear Snap Ring
• Check for deformation, fatigue or damage.
CAUTION:
If necessary, replace the snap ring.
1st One-way Clutch
• Check frictional surface for wear or damage.
CAUTION:
If necessary, replace the 1st one-way clutch.
Mid Sun Gear
• Check for deformation, fatigue or damage.
CAUTION:
If necessary, replace the mid sun gear.
Rear Sun Gear
• Check for deformation, fatigue or damage.
CAUTION:
If necessary, replace the rear sun gear.
High and Low Reverse Clutch Hub
• Check for deformation, fatigue or damage.
CAUTION:
If necessary, replace the high and low reverse clutch hub.
ASSEMBLY
SCIA4633E
SCIA2861E

REPAIR FOR COMPONENT PARTS
AT-271
< SERVICE INFORMATION >
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1. Install new seal rings to mid sun gear.
CAUTION:
• Do not reuse seal rings.
• Apply petroleum jelly to seal rings.
2. Install 1st one-way clutch to rear sun gear.
CAUTION:
Apply petroleum jelly to 1st one-way clutch.
3. Install snap ring to rear sun gear using suitable tool.
4. Install rear sun gear assembly to mid sun gear assembly.
5. Install needle bearing to high and low reverse clutch hub.
CAUTION:
• Take care with the direction of needle bearing. Refer to
AT-237, "
Location of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings".
• Apply petroleum jelly to needle bearing.
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SCIA4633E
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