2006 INFINITI QX56 clutch

AT-208
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: November 20092006 QX56
Engine Speed Does Not Return to IdleECS00CKI
SYMPTOM:
When a shift-down is performed, the engine speed does not smoothly return to the idling speed.
DIAGNOSTIC PROCEDURE
1. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 2 , "
Checking Automatic Trans-
mission Fluid (ATF)" .
OK or NG
OK >> GO TO 2.
NG >> Refill ATF.
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 8 6 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate front brake solenoid valve, direct clutch solenoid valve, ATF pressure
switch 1, ATF pressure switch 5, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT- 1 4 3 , "DTC P1757 FRONT BRAKE SOLENOID
VA LV E" , AT- 1 4 7 , "DTC P1762 DIRECT CLUTCH SOLENOID VALVE" , AT- 1 5 9 , "DTC P1841 ATF
PRESSURE SWITCH 1" , AT- 1 6 3 , "DTC P1845 ATF PRESSURE SWITCH 5" , AT- 1 2 4 , "DTC
P1705 THROTTLE POSITION SENSOR" , AT- 111 , "DTC P0720 VEHICLE SPEED SENSOR A/T
(REVOLUTION SENSOR)" , AT- 1 3 2 , "DTC P1721 VEHICLE SPEED SENSOR MTR" .
NO >> GO TO 3.
3. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 3 0 , "
Control Valve With TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 7.
4. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 1 ,
"Symptom Chart" (Symptom No.65).
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
SAT638A
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AT-228
ON-VEHICLE SERVICE
Revision: November 20092006 QX56
ON-VEHICLE SERVICEPFP:00000
Oil PanECS00EPZ
REMOVAL AND INSTALLATION
Removal
1. Drain A/T fluid. Refer to AT- 1 2 , "Changing Automatic Transmission Fluid (ATF)" .
2. Remove oil pan and gasket.
3. Check foreign materials in oil pan to help determine cause of malfunction. If the A/T fluid is very dark, has some burned smell, or contains foreign particles, friction material (clutches, band) may need replacement.
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.
CAUTION:
If friction material is detected, flush the transmission cooler after repair. Refer to AT- 1 4 , "
A/T Fluid
Cooler Cleaning" .
4. Remove magnets from oil pan.
Installation
1. Install the oil pan magnets as shown.
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OVERHAULAT-251
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Revision: November 2009 2006 QX56
1. O-ring2. Oil pump cover3. O-ring
4. Oil pump housing 5. Self-sealing bolt6. Torque converter
7. Converter housing 8. Oil pump housing oil seal9. Bearing race
10. Needle bearing 11. O-ring12. Front carrier assembly
13. Needle bearing 14. Snap ring15. Front sun gear
16. 3rd one-way clutch 17. Snap ring18. Bearing race
19. Needle bearing 20. Seal ring21. Input clutch assembly
22. Needle bearing 23. Rear internal gear24. 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 gear33. 1st one-way clutch
34. Snap ring 35. Needle bearing36. High and low reverse clutch hub
37. Snap ring 38. Bearing race39. Needle bearing

AT-252
OVERHAUL
Revision: November 20092006 QX56
1. Bearing race2. High and low reverse clutch assem-
bly 3. Needle bearing
4. Direct clutch assembly 5. Needle bearing 6. Reverse brake dish plate
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AT-264
DISASSEMBLY
Revision: November 20092006 QX56
DISASSEMBLYPFP:31020
DisassemblyECS00EQ7
CAUTION:
Do not disassemble parts behind drum support. Refer to AT- 1 7 , "
Cross-Sectional View (2WD models)"
or AT- 1 8 , "Cross-Sectional View (4WD models)" .
1. Drain ATF through drain plug.
2. Remove torque converter by holding it firmly and turing while pulling straight out.
3. Check torque converter one-way clutch using check tool as shown.
a. Insert check tool into the groove of bearing support built into one-way clutch outer race.
b. While holding bearing support with check tool, rotate one- way clutch spline using suitable tool.
c. Check that inner race rotates clockwise only. If not, replace torque converter assembly.
4. Remove converter housing from transmission case. CAUTION:
Be careful not to scratch converter housing.
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DISASSEMBLYAT-265
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Revision: November 2009 2006 QX56
5. Remove O-ring from input clutch assembly.
6. Remove bolts for oil pump assembly and transmission case.
7. Extract oil pump assembly evenly from transmission case using
To o l .
CAUTION:

Fully tighten sliding hammer screw.

Make sure that bearing race is installed to the oil pump
assembly edge surface.
8. Remove O-ring from oil pump assembly.
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Tool number : ST25850000 (J-25721-A)
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AT-266
DISASSEMBLY
Revision: November 20092006 QX56
9. Remove bearing race from oil pump assembly.
10. Remove needle bearing from front sun gear assembly.
11. Remove front sun gear assembly from front carrier assembly.
NOTE:
Remove front sun gear assembly by rotating left/right.
12. Remove seal rings from input clutch assembly.
13. Remove front carrier assembly, input clutch assembly and rear internal gear as a unit.
CAUTION:
Be careful to remove it with needle bearing.
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DISASSEMBLYAT-269
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Revision: November 2009 2006 QX56
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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