2006 INFINITI QX56 rack

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

ASSEMBLYAT-309
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Revision: November 2009 2006 QX56
iii. Install brackets (1).
iv. Tighten adapter case assembly bolts to specified torque.
CAUTION:
Do not reuse self-sealing bolts (2).
35. Install needle bearing in drum support edge surface. CAUTION:
Apply petroleum jelly to needle bearing.
36. Install direct clutch assembly in reverse brake.
37. Install high and low reverse clutch assembly in direct clutch assembly.Adapter case assembly bolts : 52 N·m (5.3 kg-m,
38 ft-lb)
Self-sealing bolt : 61 N·m (6.2 kg-m,
45 ft-lb)
WCIA0563E
SCIA5198E
SCIA5019E
SCIA2306E

ASSEMBLYAT-317
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Revision: November 2009 2006 QX56
5. Tighten oil pump bolts to specified torque. Refer to AT- 2 5 0 ,
"Components" .
CAUTION:
Apply ATF to oil pump bushing.
6. Install new O-ring to input clutch assembly. CAUTION:

Do not reuse O-ring.

Apply ATF to O-ring.
7. Install converter housing to transmission case. CAUTION:
Do not reuse self-sealing bolt.
8. Make sure that brake band does not close turbine revolution sensor hole.
9. Install control valve with TCM.
a. Install A/T fluid temperature sensor 2 to bracket.
SCIA2300E
SCIA5011E
Converter housing bolt : 52 N·m (5.3 kg-m, 38 ft-lb)
Self-sealing bolt : 61 N·m (6.2 kg-m, 45 ft-lb)
SCIA5171E
SCIA5034E
SCIA5264E

AT-318
ASSEMBLY
Revision: November 20092006 QX56
b. Install A/T fluid temperature sensor 2 (with bracket) in control
valve with TCM. Tighten A/T fluid temperature sensor 2 bolt to
the specified torque. Refer to AT- 2 5 0 , "
Components" .
CAUTION:
Adjust bolt hole of bracket to bolt hole of control valve with
TCM.
c. Install new O-ring to A/T assembly harness connector. CAUTION:

Do not reuse O-ring.

Apply ATF to O-ring.
d. Connect TCM connector and park/neutral position (PNP) switch connector.
e. Install A/T assembly harness connector to control valve with TCM.
f. Connect TCM connectors.
SCIA5301E
SCIA5155E
SCIA5449E
SCIA5450E
SCIA5447E

ATC-154
HEATER & COOLING UNIT ASSEMBLY
Revision: November 20092006 QX56
Rear Heater and Cooling Unit Assembly
Removal and InstallationEJS003YF
FRONT HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Move the two front seats to the rearmost position on the seat track.
2. Disconnect the battery negative terminal and battery positive terminal.
3. Discharge the refrigerant from the A/C system. Refer to ATC-171, "
Discharging Refrigerant" .
WJIA2315E
1. Rear heater and cooling unit assembly 2. Rear A/C pipes 3. Rear A/C heater core pipes
4. Rear heater core hose 5. Rear blower motor6. Underfloor rear A/C pipes
7. Underfloor rear heater core pipes A. Bolt torque specifications B. Leak checking order (l - r)
C. Tightening torque D. Wrench sizeE. O-ring size
⇐ Front
NOTE: The O-ring size 8 is the high-side and the O-ring size 16 is the low-side.

HEATER & COOLING UNIT ASSEMBLYATC-155
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Revision: November 2009 2006 QX56
4. Drain the coolant from the engine cooling system. Refer to MA-13, "DRAINING ENGINE COOLANT" .
5. Disconnect the front heater hoses from the front heater core.
6. Disconnect the high/low pressure pipes from the front expansion valve.
7. Remove the instrument panel and console panel. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
8. Remove the steering column. Refer to PS-10, "
STEERING COLUMN" .
9. Disconnect the instrument panel wire harness at the RH and LH in-line connector brackets, and the fuse block (J/B) electrical connectors. Refer to PG-4, "
POWER SUPPLY ROUTING CIRCUIT" .
10. Disconnect the steering member from each side of the vehicle body.
11. Remove the front heater and cooling unit assembly with it attached to the steering member, from the vehi- cle.
CAUTION:
Use care not to damage the seats and interior trim panels when removing the front heater and
cooling unit assembly with it attached to the steering member.
12. Remove the front heater and cooling unit assembly from the steering member.
Installation
Installation is in the reverse order of removal.
CAUTION:

Replace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply
compressor oil to it when installing it.

After charging the refrigerant, check for leaks.
NOTE:

Fill the engine cooling system with the specified coolant mixture. Refer to MA-14, "REFILLING ENGINE
COOLANT" .

Recharge the A/C system. Refer to ATC-171, "Evacuating System and Charging Refrigerant" .
REAR HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Discharge the refrigerant from the A/C system. Refer to ATC-171, "Discharging Refrigerant" .
2. Drain the coolant from the engine cooling system. Refer to MA-13, "
DRAINING ENGINE COOLANT" .
3. Disconnect the rear heater core hoses from the rear heater core.
4. Disconnect the rear A/C pipes from the rear expansion valve.
5. Remove the luggage side finisher lower RH. Refer to EI-35,
"BODY SIDE TRIM" .
6. Disconnect the following electrical connectors:

Rear blower motor

Rear blower motor resistor

Rear air mix door motor
7. Disconnect the ducts from the rear heater and cooling unit assembly.
8. Remove the rear heater and cooling unit assembly.
Installation
Installation is in the reverse order of removal.
CAUTION:

Replace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply
compressor oil to it when installing it.

After charging the refrigerant, check for leaks.
NOTE:

Fill the engine cooling system with the specified coolant mixture. Refer to MA-14, "REFILLING ENGINE
COOLANT" .

Recharge the A/C system. Refer to ATC-171, "Evacuating System and Charging Refrigerant" .
LJIA0021E

ATC-156
HEATER CORE
Revision: November 20092006 QX56
HEATER COREPFP:27140
ComponentsEJS003YG
Front Heater and Cooling Unit Assembly
LJIA0138E
1. Heater core cover2. Heater core pipe bracket 3. Heater core
4. Upper bracket 5. Upper heater and cooling unit case 6. A/C evaporator
7. Lower heater and cooling unit case 8. Blower motor 9. Variable blower control

HEATER COREATC-157
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Revision: November 2009 2006 QX56
Rear Heater and Cooling Unit Assembly
Removal and InstallationEJS003YH
FRONT HEATER CORE
Removal
1. Remove the front heater and cooling unit assembly. Refer to ATC-154, "FRONT HEATER AND COOLING
UNIT ASSEMBLY" .
2. Remove the four screws and remove the upper bracket.
3. Remove the four screws and remove the heater core cover.
4. Remove the heater core pipe bracket.
LJIA0135E
1. Front cover 2. Evaporator and heater core case 3. Evaporator
4. Side cover 5. Heater core6. Blower motor
7. Blower motor case 8. Blower motor resistor