2001 INFINITI QX4 check oil

SAT860A
DISASSEMBLY AND ASSEMBLYNBAT0135Forward and overrun clutches are serviced essentially the same
way as reverse clutch is serviced. However, note the following
exceptions.
ICheck of forward clutch operation
SAT861A
ICheck of overrun clutch operation
SAT865A
IRemoval of forward clutch drum
Remove forward clutch drum from transmission case by hold-
ing snap ring.
SAT862A
IRemoval of forward clutch and overrun clutch pistons
a) While holding overrun clutch piston, gradually apply com-
pressed air to oil hole.
SAT863A
b) Remove overrun clutch from forward clutch.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches (Cont'd)
AT-321

Low & Reverse Brake
COMPONENTSNBAT0136
SAT160K
SAT872A
DISASSEMBLYNBAT01371. Check operation of low and reverse brake.
a. Install seal ring onto oil pump cover and install reverse clutch.
Apply compressed air to oil hole.
b. Check to see that retaining plate moves to snap ring.
c. If retaining plate does not contact snap ring,
ID-ring might be damaged.
IOil seal might be damaged.
IFluid might be leaking past piston check ball.
SAT873A
2. Remove snap ring, low and reverse brake drive plates, driven
plates and dish plate.
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake
AT-324

SAT382I
3. Remove low one-way clutch inner race, spring retainer and
return spring from transmission case.
4. Remove seal rings from low one-way clutch inner race.
5. Remove needle bearing from low one-way clutch inner race.
SAT876A
6. Remove low and reverse brake piston using compressed air.
7. Remove oil seal and D-ring from piston.
INSPECTIONNBAT0138Low and Reverse Brake Snap Ring and Spring RetainerNBAT0138S01ICheck for deformation, or damage.
SAT829A
Low and Reverse Brake Return SpringsNBAT0138S02ICheck for deformation or damage. Also measure free length
and outside diameter.
Inspection standard:
Refer to SDS, AT-357.
SAT845A
Low and Reverse Brake Drive PlatesNBAT0138S03ICheck facing for burns, cracks or damage.
IMeasure thickness of facing.
Thickness of drive plate:
Standard value
Model 4EX16 (2WD)
1.90 - 2.05 mm (0.075 - 0.081 in)
Model 4EX17, 4EX23 (4WD)
1.52 - 1.67 mm (0.0598 - 0.0657 in)
Wear limit
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont'd)
AT-325

1.40 mm (0.0551 in)
IIf not within wear limit, replace.
SAT877A
Low One-way Clutch Inner RaceNBAT0138S04ICheck frictional surface of inner race for wear or damage.
SAT878A
IInstall a new seal rings onto low one-way clutch inner race.
IBe careful not to expand seal ring gap excessively.
IMeasure seal ring-to-groove clearance.
Inspection standard:
Standard value: 0.10 - 0.25 mm (0.0039 - 0.0098 in)
Allowable limit: 0.25 mm (0.0098 in)
IIf not within allowable limit, replace low one-way clutch inner
race.
SAT112B
ASSEMBLYNBAT01391. Install needle bearing onto one-way clutch inner race.
IPay attention to its direction Ð Black surface goes to rear
side.
IApply petroleum jelly to needle bearing.
SAT879A
2. Install oil seal and D-ring onto piston.
IApply ATF to oil seal and D-ring.
REPAIR FOR COMPONENT PARTS
Low & Reverse Brake (Cont'd)
AT-326

SAT905A
8. After installing, check to assure that forward clutch hub rotates
clockwise.
Band Servo Piston Assembly
COMPONENTSNBAT0148
SAT161K
SAT909A
DISASSEMBLYNBAT01491. Block one oil hole in OD servo piston retainer and the center
hole in OD band servo piston.
2. Apply compressed air to the other oil hole in piston retainer to
remove OD band servo piston from retainer.
3. Remove D-ring from OD band servo piston.
SAT910A
4. Remove band servo piston assembly from servo piston
retainer by pushing it forward.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REPAIR FOR COMPONENT PARTS
Rear Internal Gear and Forward Clutch Hub (Cont'd)
AT-333

SAT957A
b. Carefully push output shaft against front of transmission case.
Install snap ring on front of output shaft.
ICheck to be sure output shaft cannot be removed in rear
direction.
SAT217B
c. Install needle bearing on transmission case.
IPay attention to its direction Ð Black side goes to rear.
IApply petroleum jelly to needle bearing.
SAT218B
d. Install parking gear on transmission case.
SAT960A
e. Install snap ring on rear of output shaft.
ICheck to be sure output shaft cannot be removed in for-
ward direction.
SAT759I
7. Install adapter case (4WD model only).
a. Install oil seal on adapter case.
IApply ATF to oil seal.
ASSEMBLY
Assembly (1) (Cont'd)
AT-344

SAT006B
c. Place control valve assembly on transmission case. Connect
solenoid connector for upper body.
d. Install connector clip.
SAT353B
e. Install control valve assembly on transmission case.
f. Install connector tube brackets and tighten bolts A and B.
ICheck that terminal assembly does not catch.
Bolt symbolmm (in)
A 33 (1.30)
B 45 (1.77)
SAT221B
g. Install O-ring on oil strainer.
IApply petroleum jelly to O-ring.
h. Install oil strainer on control valve.
SAT009B
i. Securely fasten terminal harness with clips.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
ASSEMBLY
Assembly (2) (Cont'd)
AT-353

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