INFINITI QX4 2001 Factory Service Manual

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.
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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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SAT353B
b. Remove bolts A and B, and remove control valve assembly
from transmission.
Bolt symbol Length mm (in)
A 33 (1.30)
B 45 (1.77)
SAT026B
c. Remove solenoid connector.
IBe careful not to damage connector.
SAT127B
d. Remove manual valve from control valve assembly.
SAT128B
12. Remove terminal cord assembly from transmission case while
pushing on stopper.
IBe careful not to damage cord.
IDo not remove terminal cord assembly unless it is dam-
aged.
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AT-288

SAT999A
13. Remove converter housing from transmission case.
IBe careful not to scratch converter housing.
SAT995A
14. Remove O-ring from input shaft.
SAT027B
15. Remove oil pump assembly.
a. Attach Tool to oil pump assembly and extract it evenly from
transmission case.
SAT028B
b. Remove O-ring from oil pump assembly.
c. Remove traces of sealant from oil pump housing.
IBe careful not to scratch pump housing.
SAT108B
d. Remove needle bearing and thrust washer from oil pump
assembly.
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SAT988A
16. Remove input shaft and oil pump gasket.
SAT029B
17. Remove brake band and band strut.
a. Loosen lock nut and remove band servo anchor end pin from
transmission case.
SAT986A
b. Remove brake band and band strut from transmission case.
SAT655
c. Hold brake band in a circular shape with clip.
SAT030B
18. Remove front side clutch and gear components.
a. Remove clutch pack (reverse clutch, high clutch and front sun
gear) from transmission case.
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SAT113B
b. Remove front bearing race from clutch pack.
c. Remove rear bearing race from clutch pack.
SAT031B
d. Remove front planetary carrier from transmission case.
SAT968A
e. Remove front needle bearing from front planetary carrier.
f. Remove rear bearing from front planetary carrier.
SAT974A
g. Remove rear sun gear from transmission case.
SAT546J
19. Remove rear extension assembly (2WD model only).
a. Remove rear extension assembly.
b. Remove parking gear and needle bearing.
CAUTION:
Insert your hand between rear extension and transmission
case. Detach rear extension assembly while holding parking
gear and needle bearing by hand.
c. Remove rear extension gasket.
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SAT755I
20. Remove adapter case (4WD model only).
a. Remove adapter case from transmission case.
b. Remove adapter case gasket from transmission case.
SAT756I
c. Remove oil seal from adapter case.
IBe careful not to scratch adapter case.
IDo not remove oil seal unless it is to be replaced.
SAT556J
21. Remove revolution sensor from rear extension or adapter
case.
a. Remove O-ring from revolution sensor.
SAT960A
22. Remove output shaft and parking gear (4WD model only).
a. Remove rear snap ring from output shaft.
SAT957A
b. Slowly push output shaft all the way forward.
IDo not use excessive force.
c. Remove snap ring from output shaft.
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SAT109B
d. Remove output shaft and parking gear as a unit from transmis-
sion case.
e. Remove parking gear from output shaft.
SAT033B
f. Remove needle bearing from transmission case.
SAT954A
23. Remove rear side clutch and gear components.
a. Remove front internal gear.
SAT110B
b. Remove bearing race from front internal gear.
SAT111B
c. Remove needle bearing from rear internal gear.
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SAT951A
d. Remove rear internal gear, forward clutch hub and overrun
clutch hub as a set from transmission case.
SAT148G
e. Remove needle bearing from overrun clutch hub.
f. Remove overrun clutch hub from rear internal gear and for-
ward clutch hub.
SAT036B
g. Remove thrust washer from overrun clutch hub.
SAT037B
h. Remove forward clutch assembly from transmission case.
SAT038B
24. Remove band servo and accumulator components.
a. Remove band servo retainer from transmission case.
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SAT039B
b. Apply compressed air to oil hole until band servo piston comes
out of transmission case.
IHold piston with a rag and gradually direct air to oil hole.
c. Remove return springs.
SAT040BA
d. Remove springs from accumulator pistons B, C and D.
e. Apply compressed air to each oil hole until piston comes out.
IHold piston with a rag and gradually direct air to oil hole.
Identification of accumulator pistons A B C D
Identification of oil holes a b c d
SAT523GA
f. Remove O-ring from each piston.
SAT041B
25. Remove manual shaft components, if necessary.
a. Hold width across flats of manual shaft (outside the transmis-
sion case) and remove lock nut from shaft.
SAT042B
b. Remove retaining pin from transmission case.
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