torque INFINITI QX4 2001 Factory Workshop Manual

RemovalNBAT0214
SAT362IA
SAT163K
CAUTION:
When removing the A/T assembly from engine, first remove
the crankshaft position sensor (OBD) from the A/T assembly
lower side.
Be careful not to damage sensor edge.
Ð 4WD MODEL ÐNBAT0214S011. Remove battery negative terminal.
2. Remove exhaust front and rear tubes.
3. Remove fluid charging pipe from A/T assembly.
4. Remove oil cooler pipe from A/T assembly.
5. Plug up openings such as the fluid charging pipe hole, etc.
6. Remove propeller shaft. Refer to PD-4, ªComponentsº.
7. Remove transfer control linkage from transfer. Refer to TF-119,
ªRemovalº.
IInsert plug into rear oil seal after removing rear propeller
shaft.
IBe careful not to damage spline, sleeve yoke and rear oil
seal.
8. Remove A/T control cable from A/T assembly.
9. Disconnect A/T solenoid, PNP switch, turbine revolution, revo-
lution and speedometer sensor harness connectors.
SAT148K
10. Remove starter motor. Refer to SC-18, ªRemoval and Installa-
tionº.
11. Remove bolts securing torque converter to drive plate.
IRemove the bolts by turning crankshaft.
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REMOVAL AND INSTALLATION
Removal
AT-277

SAT801C
12. Support A/T and transfer assembly with a jack.
13. Remove rear engine mounting member from body and A/T
assembly. Tighten rear engine mounting member to the speci-
fied torque. Refer to EM-59, ªRear Engine Mountingº.
14. Remove bolts securing A/T assembly to engine.
ISecure torque converter to prevent it from dropping.
ISecure A/T assembly to a jack.
15. Lower A/T assembly with transfer.
SAT553J
SAT544J
Ð 2WD MODEL ÐNBAT0214S02CAUTION:
IDo not attach lifting cable to or place supporting fixture
under companion flange at rear of A/T (shown in the fig-
ure at left) when lifting/lowering A/T.
IBe sure to attach lifting cable to rear engine mounting or
dynamic damper location when lifting/lowering A/T.
1. Remove battery negative terminal.
2. Remove exhaust front and rear tubes.
3. Remove fluid charging pipe from A/T assembly.
4. Remove oil cooler pipe from A/T assembly.
5. Plug up openings such as the fluid charging pipe hole, etc.
6. Remove propeller shaft. Refer to PD-4, ªComponentsº.
7. Remove A/T control cable from A/T assembly.
8. Disconnect A/T and speedometer sensor harness connectors.
9. Remove starter motor. Refer to SC-18, ªRemoval and Installa-
tionº.
10. Remove gusset and rear plate cover securing engine to A/T
assembly.
11. Remove bolts securing torque converter to drive plate.
IRemove the bolts by turning crankshaft.
12. Support A/T assembly with a jack.
13. Remove rear engine mounting member from body and A/T
assembly. Tighten rear engine mounting member to the speci-
fied torque. Refer to EM-59, ªRear Engine Mountingº.
14. Remove bolts securing A/T assembly to engine.
15. Pull A/T assembly backwards.
ISecure torque converter to prevent it from dropping.
ISecure A/T assembly to a jack.
16. Lower A/T assembly.
SAT977H
InstallationNBAT0107IDrive plate runout
Maximum allowable runout:
Refer to EM-70, ªFLYWHEEL/DRIVE PLATE RUNOUTº.
If this runout is out of specification, replace drive plate with ring
gear.
REMOVAL AND INSTALLATION
Removal (Cont'd)
AT-278

SAT017B
IWhen connecting torque converter to transmission, measure
distance ªAº to be certain that they are correctly assembled.
Distance ªAº:
25.0 mm (0.984 in) or more
SAT148K
IInstall converter to drive plate.
IAfter converter is installed to drive plate, rotate crankshaft
several turns and check to be sure that transmission
rotates freely without binding.
SAT149K
ITighten bolts securing transmission.
Bolt No.Tightening torque
N´m (kg-m, ft-lb)Bolt length ªº
mm (in)
1 70 - 80 (7.1 - 8.2, 52 - 59) 65 (2.56)
2 70 - 80 (7.1 - 8.2, 52 - 59) 55 (2.17)
3 29 - 39 (3.0 - 4.0, 22 - 29) 40 (1.57)
IReinstall any part removed.
SAT638A
ICheck fluid level in transmission.
IMove selector lever through all positions to be sure that trans-
mission operates correctly.
With parking brake applied, rotate engine at idling. Move selec-
tor lever through ªNº to ªDº, to ª2º, to ª1º and to ªRº positions.
A slight shock should be felt by hand gripping selector each
time transmission is shifted.
IPerform road test. Refer to ªROAD TESTº, AT-63.
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REMOVAL AND INSTALLATION
Installation (Cont'd)
AT-279

NBAT0111
SAT018B
1. Drain ATF through drain plug.
2. Remove turbine revolution sensor.
3. Remove torque converter by holding it firmly and turning while
pulling straight out.
SAT521G
4. Check torque converter one-way clutch.
a. Insert Tool into spline of one-way clutch inner race.
b. Hook bearing support unitized with one-way clutch outer race
with suitable wire.
c. Check that one-way clutch inner race rotates only clockwise
with Tool while holding bearing support with wire.
SAT021BB
5. Remove PNP switch from transmission case.
SAT754I
6. Remove oil pan.
IAlways place oil pan straight down so that foreign particles
inside will not move.
SAT522G
7. Place transmission into Tool with the control valve facing up.
DISASSEMBLY
AT-286

SAT171B
8. Check foreign materials in oil pan to help determine cause of
malfunction. If the fluid is very dark, smells burned, or contains
foreign particles, the frictional material (clutches, band) may
need replacement. A tacky film that will not wipe clean indi-
cates varnish build up. Varnish can cause valves, servo, and
clutches to stick and may inhibit pump pressure.
IIf frictional material is detected, replace radiator after
repair of A/T. Refer to LC-19, ªREMOVAL AND INSTALLA-
TIONº.
SAT024BC
9. Remove torque converter clutch solenoid valve and A/T fluid
temperature sensor connectors.
IBe careful not to damage connector.
SAT008B
10. Remove oil strainer.
a. Remove oil strainer from control valve assembly.
Then remove O-ring from oil strainer.
SAT025B
b. Check oil strainer screen for damage.
SAT009B
11. Remove control valve assembly.
a. Straighten terminal clips to free terminal cords then remove
terminal clips.
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DISASSEMBLY
AT-287

SAT194B
DISASSEMBLYNBAT01171. Remove solenoids.
a. Remove torque converter clutch solenoid valve and side plate
from lower body.
b. Remove O-ring from solenoid.
SAT667A
c. Remove line pressure solenoid valve from upper body.
d. Remove O-ring from solenoid.
SAT043G
e. Remove 3-unit solenoid assembly from upper body.
f. Remove O-rings from solenoids.
SAT195B
2. Disassemble upper and lower bodies.
a. Place upper body facedown, and remove bolts, reamer bolts
and support plates.
b. Remove lower body, separator plate as a unit from upper body.
IBe careful not to drop pilot filter, orifice check valve,
spring and steel balls.
SAT670A
c. Place lower body facedown, and remove separator plate.
d. Remove pilot filter, orifice check valve and orifice check spring.
REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont'd)
AT-302

SAT676A
Pilot FilterNBAT0118S03ICheck to make sure that filter is not clogged or damaged.
SAT149G
Torque Converter Clutch Solenoid ValveNBAT0118S04ICheck that filter is not clogged or damaged.
IMeasure resistance. Refer to ªComponent Inspectionº, AT-152.
Line Pressure Solenoid ValveNBAT0118S05ICheck that filter is not clogged or damaged.
IMeasure resistance. Refer to ªComponent Inspectionº, AT-167.
SAT095B
3-Unit Solenoid Assembly (Overrun Clutch Solenoid
Valve and Shift Solenoid Valves A and B)
NBAT0118S06IMeasure resistance of each solenoid. Refer to ªComponent
Inspectionº, AT-171, AT-175 and AT-189.
SAT096BA
A/T Fluid Temperature Sensor and SwitchNBAT0118S07IMeasure resistance. Refer to ªComponent Inspectionº, AT-110
and AT-264.
SAT671A
ASSEMBLYNBAT01191. Install upper and lower bodies.
a. Place oil circuit of upper body face up. Install steel balls in their
proper positions.
REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont'd)
AT-304

SAT199BA
g. Install and temporarily tighten bolts and tube brackets in their
proper locations.
Bolt length and location:
Bolt symbol a b c d
Bolt length mm (in) 70 (2.76) 50 (1.97) 33 (1.30) 27 (1.06)
SAT200B
2. Install solenoids.
a. Attach O-ring and install torque converter clutch solenoid valve
and side plates onto lower body.
SAT150G
b. Attach O-rings and install 3-unit solenoids assembly onto
upper body.
c. Attach O-ring and install line pressure solenoid valve onto
upper body.
3. Tighten all bolts.
REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont'd)
AT-306

SAT001B
7. Install turbine revolution sensor.
8. Adjust brake band.
a. Tighten anchor end bolt to specified torque.
Anchor end bolt:
:4-6N´m(0.4 - 0.6 kg-m, 35 - 52 in-lb)
b. Back off anchor end bolt two and a half turns.
SAT002B
c. While holding anchor end bolt, tighten lock nut.
Ancher end bolt nut:
: 41 - 50 N´m (4.1 - 5.2 kg-m, 30 - 37 ft-lb)
SAT115B
9. Install terminal cord assembly.
a. Install O-ring on terminal cord assembly.
IApply petroleum jelly to O-ring.
b. Compress terminal cord assembly stopper and install terminal
cord assembly on transmission case.
SAT004BA
10. Install control valve assembly.
a. Install accumulator piston return springs B, C and D.
Free length of return springs:
Refer to SDS, AT-357.
SAT005B
b. Install manual valve on control valve.
IApply ATF to manual valve.
ASSEMBLY
Assembly (2) (Cont'd)
AT-352

SAT010B
j. Install torque converter clutch solenoid valve and A/T fluid tem-
perature sensor connectors.
SAT011B
11. Install oil pan.
a. Attach a magnet to oil pan.
SAT365I
b. Install new oil pan gasket on transmission case.
c. Install oil pan and bracket on transmission case.
IAlways replace oil pan bolts as they are self-sealing bolts.
IBefore installing bolts, remove traces of sealant and oil
from mating surface and thread holes.
ITighten four bolts in a criss-cross pattern to prevent dis-
location of gasket.
d. Tighten drain plug.
SAT299I
12. Install PNP switch.
a. Check that manual shaft is in ª1º position.
b. Temporarily install PNP switch on manual shaft.
c. Move manual shaft to ªNº.
SAT014B
d. Tighten bolts while inserting 4.0 mm (0.157 in) dia. pin verti-
cally into locating holes in PNP switch and manual shaft.
ASSEMBLY
Assembly (2) (Cont'd)
AT-354