4WD INFINITI QX56 2006 Factory User Guide

AT-262
OVERHAUL
Revision: November 20092006 QX56
4WD models
WCIA0561E
1. Outer diameter 68 mm (2.68 in) 2. Outer diameter 182 mm (7.17 in) 3. Outer diameter 172 mm (6.77 in)
4. Outer diameter 71 mm (2.80 in) 5. Outer diameter 169 mm (6.65 in) 6. Outer diameter 134 mm (5.28 in)

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.
SCIA5010E
SCIA3171E
SCIA5171E

AT-272
DISASSEMBLY
Revision: November 20092006 QX56
37. Remove O-ring from A/T assembly harness connector.
38. Disconnect TCM connectors.
CAUTION:
Be careful not to damage connectors.
39. Remove A/T assembly harness connector from control valve with TCM using suitable tool.
40. Disconnect TCM connector and park/neutral position switch connector.
CAUTION:
Be careful not to damage connectors.
41. Remove rear extension assembly (2WD models) or adapter case assembly (4WD models) according to the following procedures.
SCIA5155E
SCIA5447E
SCIA5448E
SCIA5449E

DISASSEMBLYAT-273
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Revision: November 2009 2006 QX56
a.2WD models

Self-sealing bolts (2)
i. Remove bolts for rear extension assembly and transmission case.
ii. Remove brackets (1).
iii. Tap rear extension assembly using suitable tool.
iv. Remove rear extension assembly with needle bearing from transmission case.
b. 4WD models

Self-sealing bolts (2)
i. Remove bolts for adapter case assembly and transmission case.
ii. Remove brackets (1).
WCIA0562E
SCIA5028E
SCIA5029E
WCIA0563E

AT-280
DISASSEMBLY
Revision: November 20092006 QX56
67. Remove return spring from servo assembly.
68. Remove O-rings from servo assembly.
69. Remove parking actuator support from rear extension (2WD
models) or adapter case (4WD models).
70. Remove parking pawl (with return spring) and pawl shaft from rear extension (2WD models) or adapter case (4WD models).
71. Remove return spring (1) from parking pawl (2).
SCIA5717E
SCIA5719E
SCIA3423E
SCIA3424E
SCIA6180E

DISASSEMBLYAT-281
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Revision: November 2009 2006 QX56
72. Remove needle bearing from rear extension (2WD models) or
adapter case (4WD models).
73. Remove rear oil seal from rear extension (2WD models) or adapter case (4WD models) using suitable tool.
CAUTION:
Be careful not to scratch rear extension (2WD models) or
adapter case (4WD models).
SCIA5221E
SCIA5272E

ASSEMBLYAT-305
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Revision: November 2009 2006 QX56
22. Measure clearance between retaining plate and snap ring. If not
within specified clearance, select proper retaining plate.
23. Install needle bearing to transmission case. CAUTION:

Take care with the direction of needle bearing. Refer to
AT- 2 6 0 , "
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings" .

Apply petroleum jelly to needle bearing.
24. Install revolution sensor to transmission case. Tighten revolution sensor bolt to the specified torque. Refer to AT- 2 5 0 , "
Compo-
nents" .
CAUTION:

Do not subject it to impact by dropping or hitting it.

Be careful not to damage harness with the edge of case.

Do not allow metal filings or foreign material to get on the
sensor front edge magnetic area.

Do not place in an area affected by magnetism.
25. Install new rear oil seal until it is flush into the rear extension (2WD models) using Tool or adapter case (4WD models) using
suitable tool.
CAUTION:

Apply ATF to rear oil seal.

Do not reuse rear oil seal.Specified clearance “A” : Standard: 0.7 - 1.1mm
(0.028 - 0.043 in)
Retaining plate : Refer to AT- 3 2 5 , "
Reverse
brake" .
SCIA5341E
SCIA5213E
SCIA2320E
Tool number : ST33400001 (J-26082)
SCIA5581E

AT-306
ASSEMBLY
Revision: November 20092006 QX56
26. Install return spring (1) to parking pawl (2).
27. Install parking pawl (with return spring) and pawl shaft to rear
extension (2WD models) or adapter case (4WD models).
28. Install parking actuator support to rear extension (2WD models) or adapter case (4WD models).
29. Install needle bearing to rear extension (2WD models) or adapter case (4WD models).
CAUTION:
Apply petroleum jelly to needle bearing.
30. Install new seal rings to output shaft. CAUTION:

Do not reuse seal rings.

Apply petroleum jelly to seal rings.
SCIA6180E
SCIA3424E
SCIA3423E
SCIA5221E
SCIA5209E

ASSEMBLYAT-307
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Revision: November 2009 2006 QX56
31. Install parking gear to output shaft.
32. Install output shaft in transmission case.
CAUTION:
Be careful not to mistake front for rear because both sides
looks similar. (Thinner end is front side.)
33. Install bearing race in output shaft.
34. Install rear extension assembly (2WD models) or adapter case assembly (4WD models) according to the following procedures.
a. 2WD models
i. Apply recommended sealant (Genuine Anaerobic Liquid Gasket or equivalent) to rear extension assembly as shown. Refer to GI-
46, "RECOMMENDED CHEMICAL PRODUCTS AND SEAL-
ANTS" .
CAUTION:
Completely remove all moisture, oil and old sealant from
the transmission case and rear extension assembly mating
surfaces.
SCIA5247E
SCIA5030E
SCIA5245E
SCIA5212E

AT-308
ASSEMBLY
Revision: November 20092006 QX56
ii. Install rear extension assembly to transmission case.
iii. Install brackets (1).
iv. Tighten rear extension assembly bolts to specified torque.
CAUTION:
Do not reuse self-sealing bolts (2).
b. 4WD models
i. Install new gasket to transmission case. CAUTION:

Do not reuse gasket.

Completely remove all moisture, oil and old gasket from
the transmission case and adapter case assembly mating
surfaces.
ii. Install adapter case assembly to transmission case.
SCIA5029E
Rear extension assembly bolts : 52 N·m (5.3 kg-m, 38 ft-lb)
Self-sealing bolts : 61 N·m (6.2 kg-m, 45 ft-lb)
WCIA0562E
SCIA5231E
SCIA5205E