2004 INFINITI QX56 lock

DISASSEMBLY
AT-273
D
E
F
G
H
I
J
K
L
MA
B
AT
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

AT-276
DISASSEMBLY
Revision: August 20072004 QX56
14. Loosen lock nut and remove band servo anchor end pin from
transmission case.
15. Remove brake band from transmission case.

To prevent brake linings from cracking or peeling, do not
stretch the flexible band unnecessarily. When removing
the brake band, always secure it with a clip as shown in
the figure at left.
Leave the clip in position after removing the brake band.

Check brake band facing for damage, cracks, wear or
burns.
16. Remove mid carrier assembly and rear carrier assembly as a
unit.
SCIA5016E
SCIA5345E
SAT6 5 5
SCIA5344E

AT-294
REPAIR FOR COMPONENT PARTS
Revision: August 20072004 QX56
2. Using a flat-bladed screwdriver, install snap ring in front sun
gear.
3. Check operation of 3rd one-way clutch.
a. Hold oil pump assembly and turn front sun gear.
b. Check 3rd one-way clutch for correct locking and unlocking
directions.
CAUTION:
If not as shown in illustration, check installation direction of
3rd one-way clutch.
SCIA3 110 E
SCIA3131E

AT-304
REPAIR FOR COMPONENT PARTS
Revision: August 20072004 QX56
5. Install needle bearing to high and low reverse clutch hub.
CAUTION:

Take care with the direction of needle baering. Refer to
AT- 2 7 1 , "
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings" .

Apply petroleum jelly to needle bearing.
6. Install high and low reverse clutch hub to mid sun gear assem-
bly.
7. Using a snap ring pliers, install snap ring to mid sun gear
assembly.
CAUTION:
Do not expand snap ring excessively.
8. Check operation of 1st one-way clutch.
a. Hold mid sun gear and turn rear sun gear.
b. Check 1st one-way clutch for correct locking and unlocking
directions.
CAUTION:
If not as shown in illustration, check installation direction of
1st one-way clutch.
9. Install needle bearing and bearing races to high and low reverse
clutch hub.
CAUTION:

Apply petroleum jelly to needle bearing and bearing
races.

Take care with order of bearing races.
SCIA2857E
SCIA2856E
SCIA2855E
SCIA3132E
SCIA5238E

ASSEMBLY
AT-321
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: August 20072004 QX56
48. Install band servo anchor end pin and lock nut in transmission
case.
CAUTION:
Do not reuse band servo anchor end pin.
49. Install brake band in transmission case.
CAUTION:
Assemble it so that identification to avoid incorrect installa-
tion faces servo side.
50. Install front sun gear assembly to front carrier assembly.
CAUTION:
Apply ATF to front sun gear radial bearing and 3rd one-way
clutch end bearing.
51. Install needle bearing in front sun gear assembly.
CAUTION:
Apply petroleum jelly to needle bearing.
52. Adjust brake band tilting using clips so that brake band contacts
front sun gear drum evenly.
SCIA5016E
SCIA2809E
SCIA5014E
SCIA2808E
SCIA5033E

AT-322
ASSEMBLY
Revision: August 20072004 QX56
53. Adjust brake band.
a. Loosen lock nut.
b. Tighten band servo anchor end pin to specified torque.
c. Back of band servo anchor end pin three turns.
d. Holding band servo anchor end pin, tighten lock nut to specified
torque. Refer to AT-261, "
Components" .
AdjustmentUCS002JR
TOTAL END PLAY

Measure clearance between front sun gear and bearing race for
oil pump cover.

Select proper thickness of bearing race so that end play is within
specifications.
1. Measure dimensions “K” and “L” and then calculate dimension
“J”.
a. Measure dimension “K”.: 5.0 N·m (0.51 kg-m, 44 in-lb)
SCIA2809E
SCIA2810E
SCIA5350E
SCIA5351E

AT-332
SERVICE DATA AND SPECIFICATIONS (SDS)
Revision: August 20072004 QX56
Vehicle Speed When Performing and Releasing Complete Lock-up UCS002JV

At closed throttle, the accelerator opening is less than 1/8 condition.

At half throttle, the accelerator opening is 4/8 of the full opening.
Vehicle Speed When Performing and Releasing Slip Lock-upUCS002J W

At closed throttle, the accelerator opening is less than 1/8 condition.
Stall SpeedUCS002JX
Line PressureUCS002JY
A/T Fluid Temperature SensorUCS002J Z
Turbine Revolution SensorUCS002K0
Vehicle Speed Sensor A/T (Revolution Sensor)UCS002K1
Final
gear
ratioThrottle positionVehicle speed km/h (MPH)
Lock-up “ON” Lock-up “OFF”
2.937Closed throttle 74 - 82 (46 - 51) 71 - 79 (45 - 49)
Half throttle 188 - 196 (117 - 122) 136 - 144 (85 - 90)
3.357Closed throttle 65 - 73 (41 - 46) 62 - 70 (39 - 44)
Half throttle 168 - 176 (105 - 110) 118 - 126 (74 - 79)
Final
gear
ratioThrottle position Gear positionVehicle speed km/h (MPH)
Slip lock-up “ON” Slip lock-up “OFF”
2.937 Closed throttle4th 52 - 60 (33 - 38) 49 - 57 (31 - 36)
5th 52 - 60 (33 - 38) 49 - 57 (31 - 36)
3.357 Closed throttle4th 46 - 54 (29 - 34) 43 - 51 (27 - 32)
5th 46 - 54 (29 - 34) 43 - 51 (27 - 32)
Stall speed2,500 - 2,800 rpm
Engine speedLine pressure [kPa (kg/cm2 , psi)]
R position D position
At idle speed 392 - 441 (4.0 - 4.5, 57 - 64) 373 - 422 (3.8 - 4.3, 54 - 61)
At stall speed 1,700 - 1,890 (17.3 - 19.3, 247 - 274) 1,310 - 1,500 (13.3 - 15.3, 190 - 218)
Name Condition CONSULT-II “DATA MONITOR” (Approx.) (V) Resistance (Approx.) (kΩ)
A/T fluid temperature sensor 10°C (32°F) 2.2 15
20°C (68°F) 1.8 6.5
80°C (176°F) 0.6 0.9
A/T fluid temperature sensor 20°C (32°F) 2.2 10
20°C (68°F) 1.7 4
80°C (176°F) 0.45 0.5
Name Condition Data (Approx.)
Turbine revolution
sensor 1When running at 50 km/h (31 MPH) in 4th speed with the closed throttle position switch
“OFF”.
1.3 (kHz)
Turbine revolution
sensor 2When moving at 20 km/h (12 MPH) in 1st speed with the closed throttle position switch
“OFF”.
Name Condition Data (Approx.)
Revolution sensor When moving at 20 km/h (12 MPH). 185 (Hz)

PRECAUTIONS
ATC-13
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: August 20072004 QX56
SERVICE COUPLERS
Never attempt to connect HFC-134a (R-134a) service couplers to a
CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will
not properly connect to the CFC-12 (R-12) system. If an improper
connection is attempted, discharging and contamination may occur.
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC134a (R-134a) and specified
lubricants have been used with the scale. If the scale controls refrig-
erant flow electronically, the hose fitting must be 1/2”-16 ACME.
CHARGING CYLINDER
Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder's top valve
when filling the cylinder with refrigerant. Also, the accuracy of the cylinder is generally less than that of an
electronic scale or of quality recycle/recharge equipment.
Wiring Diagrams and Trouble DiagnosisEJS002BO
When you read wiring diagrams, refer to the following:

GI-15, "How to Read Wiring Diagrams"

PG-4, "POWER SUPPLY ROUTING CIRCUIT"
When you perform trouble diagnosis, refer to the following:

GI-11, "How to Follow Trouble Diagnoses"

GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident"
Shut-off valve rotation A/C service valve
Clockwise Open
Counterclockwise Close
RHA273D
RHA274D