2006 INFINITI QX56 4WD

AT-256
OVERHAUL
Revision: November 20092006 QX56
4WD models
WCIA0565E
1. Rear oil seal2. Bracket 3. Adapter case
4. Parking actuator support 5. Parking pawl 6. Return spring

OVERHAULAT-259
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Revision: November 2009 2006 QX56
4WD models
SCIA5189E

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