2006 INFINITI QX56 Factory Service Manual

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INFINITI QX56 2006 Factory Service Manual AT-14
A/T FLUID
Revision: November 20092006 QX56
To check the ATF level, insert the ATF level gauge until
the cap contacts the top of the charging pipe, with the
gauge reversed from the normal insert

AT-14
A/T FLUID
Revision: November 20092006 QX56
To check the ATF level, insert the ATF level gauge until
the cap contacts the top of the charging pipe, with the
gauge reversed from the normal inserted position as
shown.
8. Check the ATF condition.
If the ATF is very dark or has some burned smell, there may be an internal problem with the transmis-
sion. Refer to AT- 1 7 6 , "
TROUBLE DIAGNOSIS FOR SYMPTOMS" . Flush the transmission cooling
system after repairing the transmission.
If the ATF contains frictional material (clutches, bands, etc.), replace the radiator and flush the transmis-
sion cooler lines using cleaning solvent and compressed air after repairing the transmission.
9. Install the ATF level gauge in the ATF charging pipe and install the level gauge bolt.
10. Tighten the level gauge bolt to specification.
A/T Fluid Cooler CleaningECS00CDS
Whenever an automatic transmission is repaired, overhauled, or replaced, the A/T fluid cooler mounted in the
radiator must be inspected and cleaned.
Metal debris and friction material, if present, can become trapped in the A/T fluid cooler. This debris can con-
taminate the newly serviced A/T or, in severe cases, can block or restrict the flow of A/T fluid. In either case,
malfunction of the newly serviced A/T may result.
Debris, if present, may build up as A/T fluid enters the cooler inlet. It will be necessary to back flush the cooler
through the cooler outlet in order to flush out any built up debris.
A/T FLUID COOLER CLEANING PROCEDURE
1. Position an oil pan under the automatic transmission's inlet and outlet cooler hoses.
2. Identify the inlet and outlet fluid cooler hoses.
3. Disconnect the fluid cooler inlet and outlet rubber hoses from the steel cooler tubes or bypass valve.
NOTE:
Replace the cooler hoses if rubber material from the hose
remains on the tube fitting.
4. Allow any A/T fluid that remains in the cooler hoses to drain into the oil pan.
5. Insert the extension adapter hose of a can of Transmission Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:
Wear safety glasses and rubber gloves when spraying
the Transmission Cooler Cleaner.
Spray cooler cleaner only with adequate ventilation.
Avoid contact with eyes and skin.
Do not breath vapors or spray mist.
SCIA1684E
Level gauge bolt: : Refer to AT- 2 5 0 , "Components" .
SCIA3830E
SCIA3831E

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INFINITI QX56 2006 Factory Service Manual A/T FLUIDAT-15
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6. Hold the hose and can as high as possible and spray Transmission Cooler Cleaner in a continuous
stream into the cooler out

A/T FLUIDAT-15
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Revision: November 2009 2006 QX56
6. Hold the hose and can as high as possible and spray Transmission Cooler Cleaner in a continuous
stream into the cooler outlet hose until fluid flows out of the cooler inlet hose for 5 seconds.
7. Insert the tip of an air gun into the end of the cooler outlet hose.
8. Wrap a shop rag around the air gun tip and of the cooler outlet hose.
9. Blow compressed air regulated to 5 - 9 kg/cm
2 (70 - 130 psi) through the cooler outlet hose for 10 sec-
onds to force out any remaining fluid.
10. Repeat steps 5 through 9 three additional times.
11. Position an oil pan under the banjo bolts that connect the fluid cooler steel lines to the transmission.
12. Remove the banjo bolts.
13. Flush each steel line from the cooler side back toward the transmission by spraying Transmission Cooler Cleaner in a continuous stream for 5 seconds.
14. Blow compressed air regulated to 5 - 9 kg/cm
2 (70 - 130 psi) through each steel line from the cooler side
back toward the transmission for 10 seconds to force out any remaining fluid.
15. Ensure all debris is removed from the steel cooler lines.
16. Ensure all debris is removed from the banjo bolts and fittings.
17. Perform AT- 1 4 , "
A/T FLUID COOLER CLEANING PROCEDURE" .
A/T FLUID COOLER DIAGNOSIS PROCEDURE
NOTE:
Insufficient cleaning of the cooler inlet hose exterior may lead to inaccurate debris identification.
1. Position an oil pan under the automatic transmission's inlet and outlet cooler hoses.
2. Clean the exterior and tip of the cooler inlet hose.
3. Insert the extension adapter hose of a can of Transmission
Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-
let hose.
CAUTION:
Wear safety glasses and rubber gloves when spraying
the Transmission Cooler Cleaner.
Spray cooler cleaner only with adequate ventilation.
Avoid contact with eyes and skin.
Do not breath vapors or spray mist.
4. Hold the hose and can as high as possible and spray Transmis- sion Cooler Cleaner in a continuous stream into the cooler outlet
hose until fluid flows out of the cooler inlet hose for 5 seconds.
5. Tie a common white, basket-type coffee filter to the end of the cooler inlet hose.
SCIA3832E
SCIA3831E
SCIA3833E

Page 91 of 3383

INFINITI QX56 2006 Factory Service Manual AT-16
A/T FLUID
Revision: November 20092006 QX56
6. Insert the tip of an air gun into the end of the cooler outlet hose.
7. Wrap a shop rag around the air gun tip and end of cooler outlet
hose.
8. Blo

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INFINITI QX56 2006 Factory Service Manual A/T CONTROL SYSTEMAT-17
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Revision: November 2009 2006 QX56
A/T CONTROL SYSTEMPFP:31036
Cross-Sectional View (2WD models)ECS00CDT
1. Front planetary gear2. Mid planetary gear 3

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INFINITI QX56 2006 Factory Service Manual AT-18
A/T CONTROL SYSTEM
Revision: November 20092006 QX56
Cross-Sectional View (4WD models)ECS00CDU
1. Front planetary gear2. Mid planetary gear 3. Rear planetary gear
4. Direct clutch 5. High and low

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INFINITI QX56 2006 Factory Service Manual A/T CONTROL SYSTEMAT-19
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Revision: November 2009 2006 QX56
Shift MechanismECS00CDV
The automatic transmission uses compact triple planetary gear systems to improve power-trans

Page 95 of 3383

INFINITI QX56 2006 Factory Service Manual AT-20
A/T CONTROL SYSTEM
Revision: November 20092006 QX56
CLUTCH AND BAND CHART
—Operates
—Operates during “progressive ” acceleration.
—Operates and effects power transmission while coa

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INFINITI QX56 2006 Factory Service Manual A/T CONTROL SYSTEMAT-21
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Revision: November 2009 2006 QX56
POWER TRANSMISSION
“N” Position
Since both the forward brake and the reverse brake are released, torque from th

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