lock INFINITI QX56 2007 Factory Repair Manual

AT-226
< SERVICE INFORMATION >
TRANSMISSION ASSEMBLY
REMOVAL
CAUTION:
When removing the A/T assembly from engine, first remove the crankshaft position sensor (POS) from
the A/T assembly.
Be careful not to damage sensor edge.
1. Disconnect the negative battery terminal.
2. Remove engine cover using power tool.
3. Remove A/T fluid indicator.
4. Remove undercovers using power tool.
5. Remove exhaust front tube and center muffler using power tool. Refer to EX-3, "
Removal and Installa-
tion".
6. Remove propeller shafts. Refer to PR-4, "
Removal and Installation" and PR-8, "Removal and Installation".
7. Remove A/T control cable. Refer to AT-207, "
Control Device Removal and Installation".
8. Remove crankshaft position sensor (POS) from A/T assembly.
CAUTION:
• Do not subject it to impact by dropping or hitting it.
• Do not disassemble.
• Do not allow metal filings or foreign material to get on the
sensor's front edge magnetic area.
• Do not place in an area affected by magnetism.
9. Disconnect A/T fluid cooler tube from A/T assembly.
10. Remove dust cover from converter housing.
11. Turn crankshaft, and remove the four bolts for drive plate and
torque converter.
CAUTION:
When turning crankshaft, turn it clockwise as viewed from
the front of the engine.
12. Support A/T assembly using transmission jack and Tool.
CAUTION:
When setting the transmission jack, be careful not to allow
it to collide against the drain plug.
NOTE:
The actual special service tool may differ from tool shown.
13. Remove cross member using power tool.
14. Tilt the transmission slightly to keep the clearance between body
and transmission, then disconnect air breather hose from A/T
fluid indicator pipe. Refer to AT-221, "
Removal and Installation".
15. Disconnect A/T assembly connector and transfer unit connector.
16. Remove A/T fluid indicator pipe.
1. A/T fluid indicator pipe 2. A/T fluid indicator 3. O-ring
4. Transmission assembly 5. Fluid cooler tube 6. Copper washer
7. A/T cross member 8. Insulator
LCIA0334E
LCIA0335E
Tool number : — (J-47002)
SCIA2203E

TRANSMISSION ASSEMBLY
AT-227
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
17. Plug any openings such as the fluid charging pipe hole.
18. Remove A/T assembly to engine bolts using power tool.
19. Remove A/T assembly with transfer from vehicle.
CAUTION:
• Secure torque converter to prevent it from dropping.
• Secure A/T assembly to transmission jack.
20. Remove transfer from A/T assembly. Refer to TF-128, "
Removal and Installation".
INSPECTION
Installation and Inspection of Torque Converter
• After inserting a torque converter to a transmission, be sure to
check dimension A to ensure it is within specifications.
INSTALLATION
Installation of the remaining components is in the reverse order of removal, while paying attention to the fol-
lowing:
• When installing transmission to the engine, attach the bolts as shown.
NOTE:
*: No.2 bolt also secures air breather vent.
CAUTION:
• When replacing an engine or transmission you must make
sure the dowels are installed correctly during re-assembly.
• Improper alignment caused by missing dowels may cause
vibration, oil leaks or breakage of drivetrain components.
• Align the positions of bolts for drive plate with those of the torque
converter, and temporarily tighten the bolts. Then tighten the bolts
with the specified torque.
CAUTION:
• When turning crankshaft, turn it clockwise as viewed from the
front of the engine.
• After converter is installed to drive plate, rotate crankshaft
several turns and check to be sure that transmission rotates
freely without binding.
• Install crankshaft position sensor (POS).
• After completing installation, check fluid leakage, fluid level, and
the positions of A/T. Refer to AT-13, "
Checking Automatic Trans-
mission Fluid (ATF)", AT-208, "Checking of A/T Position" and AT-208, "Adjustment of A/T Position". Dimension A : 24.0 mm (0.94 in) or more
SAT017B
Transmission to engine bolts : 113 N·m (12 kg-m,
83 ft-lb)
LCIA0371E
LCIA0335E

AT-240
< SERVICE INFORMATION >
DISASSEMBLY
DISASSEMBLY
DisassemblyINFOID:0000000003532486
CAUTION:
Do not disassemble parts behind drum support. Refer to AT-19, "
Cross-Sectional View (2WD models)"
or AT-20, "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.
• A: Self-sealing bolts
CAUTION:
Be careful not to scratch converter housing.
SCIA5010E
SCIA3171E
WCIA0624E

DISASSEMBLY
AT-243
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
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.
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
SAT655
SCIA5344E

AT-262
< SERVICE INFORMATION >
REPAIR FOR COMPONENT PARTS
2. Install snap ring in front sun gear using suitable tool.
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, check installation direction of 3rd one-way
clutch.
Front Carrier, Input Clutch, Rear Internal GearINFOID:0000000003532489
COMPONENTS
SCIA3110E
SCIA3131E

AT-272
< SERVICE INFORMATION >
REPAIR FOR COMPONENT PARTS
6. Install high and low reverse clutch hub to mid sun gear assem-
bly.
7. Install snap ring to mid sun gear assembly using suitable tool.
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, 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.
High and Low Reverse ClutchINFOID:0000000003532491
COMPONENTS
SCIA2856E
SCIA2855E
SCIA3132E
SCIA5238E

AT-288
< SERVICE INFORMATION >
ASSEMBLY
44. Install needle bearing (front side) in mid carrier assembly.
CAUTION:
Apply petroleum jelly to needle bearing.
45. Install mid carrier assembly in rear carrier assembly.
46. Install front carrier assembly, input clutch assembly and rear
internal gear as a unit.
47. Install new seal rings in input clutch assembly.
CAUTION:
• Do not reuse seal rings.
• Apply petroleum jelly to seal rings.
48. Install new band servo anchor end pin and lock nut in transmis-
sion case.
CAUTION:
Do not reuse band servo anchor end pin.
SCIA5176E
SCIA5344E
SCIA5173E
SCIA5269E
SCIA5016E

ASSEMBLY
AT-289
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
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.
53. Adjust brake band.
a. Loosen lock nut.
b. Tighten band servo anchor end pin to specified torque.
c. Back off band servo anchor end pin three turns.
d. Holding band servo anchor end pin, tighten lock nut to specified
torque. Refer to AT-228, "
Component".
SCIA5498E
SCIA5014E
SCIA2808E
SCIA5033E
Band servo anchor end pin : 5.0 N·m (0.51 kg-m,
44 in-lb)
SCIA5498E

SERVICE DATA AND SPECIFICATIONS (SDS)
AT-299
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
Vehicle Speed When Performing and Releasing Complete Lock-upINFOID:0000000003532498
• 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.
Stall SpeedINFOID:0000000003532499
Line PressureINFOID:0000000003532500
A/T Fluid Temperature SensorINFOID:0000000003532501
Turbine Revolution SensorINFOID:0000000003532502
Vehicle Speed Sensor A/T (Revolution Sensor)INFOID:0000000003532503
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)
Stall speed2,500 - 2,800 rpm
Engine speedLine pressure [kPa (kg/cm
2 , psi)]
R position D position
At idle speed 425 - 465 (4.3 - 4.7, 62 - 67) 379 - 428 (3.9 - 4.4, 55 - 62)
At stall speed 1,605 - 1,950 (16.4 - 19.9, 233 - 283) 1,310 - 1,500 (13.4 - 15.3, 190 - 218)
Name Condition CONSULT-II “DATA MONITOR” (Approx.) (V) Resistance (Approx.) (kΩ)
AT F T E M P S E 10°C (32°F) 3.3 15
20°C (68°F) 2.7 6.5
80°C (176°F) 0.9 0.9
AT F T E M P S E 20°C (32°F) 3.3 10
20°C (68°F) 2.5 4
80°C (176°F) 0.7 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)

PRECAUTIONSATC-11
< SERVICE INFORMATION >
C
DE
F
G H
I
K L
M A
B
AT C
N
O P
Never attempt to connect HFC-134a (R-134a) service couplers to a
CFC-12 (R-12) A/C system. T he HFC-134a (R-134a) couplers will
not properly connect to the CFC-12 (R-12) system. If an improper
connection is attempted, dischar ging and contamination may occur.
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC134a (R-134a) and specified
oils have been used with the scale. If the scale controls refrigerant
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 accura cy of the cylinder is generally less than that of an
electronic scale or of quality recycle/recharge equipment.
Shut-off valve rotati on A/C service valve
Clockwise Open
Counterclockwise Close
RHA273D
RHA274D