2001 INFINITI QX4 IDX

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.
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ASSEMBLY
Assembly (2) (Cont'd)
AT-353

SAT428DA
13. Install torque converter.
a. Pour ATF into torque converter.
IApproximately 2 liters (2-1/8 US qt, 1-3/4 Imp qt) of fluid
are required for a new torque converter.
IWhen reusing old torque converter, add the same amount
of fluid as was drained.
SAT016B
b. Install torque converter while aligning notches and oil pump.
SAT017B
c. Measure distance A to check that torque converter is in proper
position.
Distance ªAº:
25.0 mm (0.984 in) or more
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ASSEMBLY
Assembly (2) (Cont'd)
AT-355

Return SpringsNBAT0165Unit: mm (in)
PartsItem
Part No.* Free length Outer diameter
Control valveUpper body1 Torque converter relief valve spring 31742-41X23 38.0 (1.496) 9.0 (0.354)
2 Pressure regulator valve spring 31742-41X24 44.02 (1.7331) 14.0 (0.551)
3 Pressure modifier valve spring 31742-41X19 31.95 (1.2579) 6.8 (0.268)
Ð Accumulator control valve spring Ð Ð Ð
4 Shuttle shift valve D spring 31762-41X01 25.0 (0.984) 7.0 (0.276)
5 4-2 sequence valve spring 31756-41X00 29.1 (1.146) 6.95 (0.2736)
6 Shift valve B spring 31762-41X01 25.0 (0.984) 7.0 (0.276)
7 4-2 relay valve spring 31756-41X00 29.1 (1.146) 6.95 (0.2736)
8 Shift valve A spring 31762-41X01 25.0 (0.984) 7.0 (0.276)
9 Overrun clutch control valve spring 31762-41X03 23.6 (0.929) 7.0 (0.276)
10 Overrun clutch reducing valve spring 31742-41X14 38.9 (1.531) 7.0 (0.276)
11 Shuttle shift valve S spring 31762-41X04 51.0 (2.008) 5.65 (0.2224)
12 Pilot valve spring 31742-41X13 25.7 (1.012) 9.0 (0.354)
13 Torque converter clutch control valve spring 31742-41X22 18.5 (0.728) 13.0 (0.512)
Lower body1 Modifier accumulator piston spring 31742-27X70 31.4 (1.236) 9.8 (0.386)
2 1st reducing valve spring 31756-60X00 20.5 (0.807) 7.0 (0.276)
3 3-2 timing valve spring 31742-41X06 23.0 (0.906) 6.7 (0.264)
4 Servo charger valve spring 31742-41X06 23.0 (0.906) 6.7 (0.264)
Reverse clutch Ð 31505-41X07 Ð Ð
High clutch10 pcs31521-41X03
(Assembly)24.2 (0.9528) 11.6 (0.457)
Forward clutch (Overrun clutch) 20 pcs31521-41X04
(Assembly)35.77 (1.4083) 9.7 (0.382)
Low & reverse brake 18 pcs31655-41X00
(Assembly)22.3 (0.878) 11.2 (0.441)
Band servoSpring A 31605-4AX03 45.6 (1.795) 34.3 (1.350)
Spring B 31605-41X01 29.7 (1.169) 27.6 (1.087)
AccumulatorAccumulator A 31605-41X02 43.0 (1.693) 18.0 (0.709)
Accumulator B 31605-41X14 47.6 (1.874) 26.5 (1.043)
Accumulator C 31605-41X09 45.0 (1.772) 29.3 (1.154)
Accumulator D 31605-41X06 58.4 (2.299) 17.3 (0.681)
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SERVICE DATA AND SPECIFICATIONS (SDS)
Return Springs
AT-357

FORWARD CLUTCHNBAT0167S03
Code number 4EX16 4EX17
Number of drive plates 7 8
Number of driven plates 7 8
Thickness of drive
plate mm (in)Standard 1.52 - 1.67 (0.0598 - 0.0657)
Wear limit 1.40 (0.0551)
Clearance mm (in)Standard 0.35 - 0.75 (0.0138 - 0.0295)
Allowable limit 2.15 (0.0846) 2.35 (0.0925)
Thickness of retaining plateThickness mm (in) Part number* Thickness mm (in) Part number*
4.6 (0.181)
4.8 (0.189)
5.0 (0.197)
5.2 (0.205)
5.4 (0.213)
5.6 (0.220)31537-42X13
31537-42X14
31537-42X15
31537-4AX00
31537-4AX01
31537-4AX024.2 (0.165)
4.4 (0.173)
4.6 (0.181)
4.8 (0.189)
5.0 (0.197)
5.2 (0.205)
5.4 (0.213)31537-42X11
31537-42X12
31537-42X13
31537-42X14
31537-42X15
31537-4AX00
31537-4AX01
OVERRUN CLUTCHNBAT0167S04
Code number4EX16 4EX17
Number of drive plates3
Number of driven plates5
Thickness of drive plate mm (in)Standard 1.90 - 2.05 (0.0748 - 0.0807)
Wear limit 1.80 (0.0709)
Clearance mm (in)Standard 1.0 - 1.4 (0.039 - 0.055)
Allowable limit 2.0 (0.079)
Thickness of retaining plateThickness mm (in) Part number*
4.2 (0.165)
4.4 (0.173)
4.6 (0.181)
4.8 (0.189)
5.0 (0.197)31537-41X80
31537-41X81
31537-41X82
31537-41X83
31537-41X84
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SERVICE DATA AND SPECIFICATIONS (SDS)
Clutches and Brakes (Cont'd)
AT-359

Reverse Clutch Drum End PlayNBAT0170
Reverse clutch drum end play ªT2º 0.55 - 0.90 mm (0.0217 - 0.0354 in)
Thickness of oil pump thrust washerThickness mm (in) Part number*
0.9 (0.035)
1.1 (0.043)
1.3 (0.051)
1.5 (0.059)
1.7 (0.067)
1.9 (0.075)31528-21X01
31528-21X02
31528-21X03
31528-21X04
31528-21X05
31528-21X06
Removal and InstallationNBAT0171
Manual control linkageNumber of returning revolutions for lock nut 2
Lock nut tightening torque4.4 - 5.9 N´m
(0.45 - 0.60 kg-m, 39.1 - 52.1 in-lb)
Distance between end of converter housing and torque converter 25.0 mm (0.984 in) or more
*: Always check with the Parts Department for the latest parts information.
Shift Solenoid ValvesNBAT0217
Gear position1234
Shift solenoid valve A ON (Closed) OFF (Open) OFF (Open) ON (Closed)
Shift solenoid valve B ON (Closed) ON (Closed) OFF (Open) OFF (Open)
Solenoid ValvesNBAT0218
Solenoid valves Resistance (Approx.)WTerminal No.
Shift solenoid valve A 20 - 40 3
Shift solenoid valve B 20 - 40 2
Overrun clutch solenoid valve 20 - 40 4
Line pressure solenoid valve 2.5 - 5 6
Torque converter clutch solenoid valve 10 - 20 7
A/T Fluid Temperature SensorNBAT0219Remarks: Specification data are reference values.
Monitor item Condition Specification
A/T fluid tem-
perature
sensorCold [20ÉC (68ÉF)]
"
Hot [80ÉC (176ÉF)]Approximately 1.5V
"
Approximately 0.5VApproximately 2.5 kW
"
Approximately 0.3 kW
Turbine Revolution SensorNBAT0232
Terminal No. Resistance
1 2 2.4 - 2.8 kW
2 3 No continuity
1 3 No continuity
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SERVICE DATA AND SPECIFICATIONS (SDS)
Reverse Clutch Drum End Play
AT-361

FRONT & REAR AXLE
SECTION
AX
CONTENTS
FRONT AXLE..................................................................2
Precautions ..................................................................2
PRECAUTIONS.........................................................2
Preparation ..................................................................2
SPECIAL SERVICE TOOLS........................................2
COMMERCIAL SERVICE TOOLS................................2
Noise, Vibration and Harshness (NVH)
Troubleshooting ...........................................................3
NVH TROUBLESHOOTING CHART............................3
On-vehicle Service.......................................................3
FRONT AXLE PARTS................................................3
FRONT WHEEL BEARING.........................................4
DRIVE SHAFT...........................................................5
Wheel Hub and Rotor Disc..........................................6
COMPONENTS.........................................................6
REMOVAL.................................................................6
INSTALLATION..........................................................7
DISASSEMBLY..........................................................8
INSPECTION.............................................................8
ASSEMBLY...............................................................8
Knuckle Spindle ...........................................................9
REMOVAL.................................................................9
INSPECTION...........................................................10
INSTALLATION........................................................10
Drive Shaft .................................................................10
COMPONENTS.......................................................10
REMOVAL............................................................... 11
DISASSEMBLY........................................................ 11
INSPECTION...........................................................12
ASSEMBLY.............................................................13
INSTALLATION........................................................14
Service Data and Specifications (SDS).....................15
WHEEL BEARING (FRONT).....................................15
DRIVE SHAFT.........................................................16
REAR AXLE...................................................................17
Precautions ................................................................17
PRECAUTIONS.......................................................17
Preparation ................................................................17
SPECIAL SERVICE TOOLS......................................17
COMMERCIAL SERVICE TOOLS..............................18
Noise, Vibration and Harshness (NVH)
Troubleshooting .........................................................18
On-vehicle Service.....................................................18
REAR AXLE PARTS.................................................18
REAR WHEEL BEARING.........................................18
Components...............................................................19
Removal .....................................................................19
Inspection...................................................................21
AXLE SHAFT...........................................................21
BEARING CAGE......................................................21
REAR AXLE HOUSING............................................21
Installation ..................................................................21
Service Data and Specifications (SDS).....................22
WHEEL BEARING (REAR).......................................22
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Noise, Vibration and Harshness (NVH)
Troubleshooting
NBAX0034NVH TROUBLESHOOTING CHARTNBAX0034S01Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
Reference pageÐ
AX-12
Ð
AX-6, 19
Ð
AX-4, 18
PD-3
PD-3
Refer to DRIVE SHAFT
in this chart.
Refer to AXLE
in this chart.
SU-3
SU-3
SU-3
BR-6
ST-6
Possible cause and
SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
Wheel bearing damage
PROPELLER SHAFT
DIFFERENTIAL
DRIVE SHAFT
AXLE
SUSPENSION
TIRES
ROAD WHEEL
BRAKES
STEERING
SymptomDRIVE SHAFTNoise, Vibration´´ ´´ ´ ´´´´´
Shake´ ´ ´ ´ ´´´´´
AXLENoise´´ ´´ ´ ´´´´´
Shake´´ ´ ´ ´´´´´
Vibration´´ ´ ´ ´´ ´
Shimmy´´ ´´´´´
Judder´ ´´´´´
Poor quality ride or
handling´´´ ´´´
´: Applicable
SMA525A
On-vehicle Service
FRONT AXLE PARTSNBAX0004Check front axle parts for excessive play, cracks, wear and other
damage.
1. Shake each front wheel to check for excessive play.
2. Retighten all nuts and bolts to the specified torque.
Tightening torque:
Refer to ªWheel Hub and Rotor Discº, AX-6.
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FRONT AXLE
Noise, Vibration and Harshness (NVH) Troubleshooting
AX-3

SMA580A
10. Measure starting force ªAº at wheel hub bolt.
SFA830
11. Install lock washer by tightening the lock nut within 15 to 30
degrees.
12. Turn wheel hub several times in both directions to seat wheel
bearing correctly.
13. Measure starting force ªBº at wheel hub bolt. Refer to proce-
dure 10.
14. Wheel bearing preload ªCº can be calculated as shown below.
C=BþA
Wheel bearing preload ªCº:
7.06 - 20.99 N (0.72 - 2.14 kg, 1.59 - 4.72 lb)
15. If wheel bearing preload ªCº is outside specifications, remove
lock washer. Tighten or loosen lock nut within±15 degrees
(Refer to step 11 above). Install lock washer, then repeat steps
12, 13 and 14.
16. Repeat above procedures until correct axial end play and
wheel bearing preload are obtained.
17. Install drive flange and wheel hub cap.
SFA901
DRIVE SHAFTNBAX0006ICheck boot and drive shaft for cracks, wear, damage and
grease leakage.
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FRONT AXLE
On-vehicle Service (Cont'd)
AX-5