2004 INFINITI QX56 4WD

AT-272
OVERHAUL
Revision: August 20072004 QX56
4WD models
SCIA5197E

DISASSEMBLY
AT-273
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Revision: August 20072004 QX56
DISASSEMBLYPFP:31020
DisassemblyUCS002JJ
CAUTION:
Do not disassemble parts behind Drum Support. Refer to AT-18, "
Cross-Sectional View (2WD models)"
or AT- 1 9 , "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 at figure.
a. Insert check tool into the groove of bearing support built into
one-way clutch outer race.
b. When fixing bearing support with check tool, rotate one- way
clutch spline using screwdriver.
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

DISASSEMBLY
AT-281
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Revision: August 20072004 QX56
36. Remove control valve with TCM from transmission case.
CAUTION:
When removing, be careful with transmission assembly ter-
minal connector and the manual valve notch and manual
plate height.Remove it vertically.
37. Remove A/T fluid temperature sensor 2 with bracket from con-
trol valve with TCM.
38. Remove bracket from A/T fluid temperature sensor 2.
39. Remove O-ring from A/T assembly harness connector.
40. Remove rear extension assembly (2WD models) or adapter case assembly (4WD models) according to
the following procedures.
SCIA5308E
SCIA5301E
SCIA5264E
SCIA5155E

AT-282
DISASSEMBLY
Revision: August 20072004 QX56
a.2WD models
i. Remove tightening bolts for rear extension assembly and trans-
mission case.
ii. Remove bracket.
iii. Tap rear extension assembly with soft hammer.
iv. Remove rear extension assembly from transmission case. (With
needle bearing)
b.4WD models
i. Remove tightening bolts for adapter case assembly and trans-
mission case.
ii. Remove bracket.
SCIA5349E
SCIA5028E
SCIA5029E
SCIA5203E

AT-288
DISASSEMBLY
Revision: August 20072004 QX56
63. Remove detent spring and spacer from transmission case.
64. Using snap ring pliers, remove snap ring from transmission
case.
65. Remove servo assembly (with return spring) from transmission
case.
66. Remove return spring from servo assembly.
67. Remove O-rings from servo assembly.
68. Remove parking actuator support from rear extension (2WD
models) or adapter case (4WD models).
SCIA5248E
SCIA2333E
SCIA2334E
SCIA3423E

DISASSEMBLY
AT-289
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Revision: August 20072004 QX56
69. Remove parking pawl (with return spring) and pawl shaft from
rear extension (2WD models) or adapter case (4WD models).
70. Remove return spring from parking pawl.
71. Remove needle bearing from rear extension (2WD models) or
adapter case (4WD models).
72. Remove rear oil seal from rear extension (2WD models) or
adapter case (4WD models).
CAUTION:
Be careful not to scratch rear extension (2WD models) or
adapter case (4WD models).
SCIA3424E
SCIA2445E
SCIA5221E
SCIA5272E

AT-314
ASSEMBLY
Revision: August 20072004 QX56
24. Install revolution sensor to transmission case. Tighten revolution
sensor mounting bolt to the specified torque. Refer to AT-261,
"Components" .
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, etc., to get on the sensor's
front edge magnetic area.

Do not place in an area affected by magnetism.
25. As shown in the right figure illustration, use a drift to drive rear
oil seal into the rear extension (2WD models) or adapter case
(4WD models) until it is flush.
CAUTION:

Apply ATF to rear oil seal.

Do not reuse rear oil seal.
26. Install return spring to parking pawl.
27. Install parking pawl (with return spring) and pawl shaft to rear
extension (2WD models) or adapter case (4WD models).
SCIA2320E
SCIA5270E
SCIA2445E
SCIA3424E

ASSEMBLY
AT-315
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Revision: August 20072004 QX56
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 seal rings to output shaft.
CAUTION:

Do not reuse seal rings.

Apply petroleum jelly to seal rings.
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.)
SCIA3423E
SCIA5221E
SCIA5209E
SCIA5247E
SCIA5030E