2001 INFINITI QX4 service

Tool number
(Kent-Moore No.)
Tool nameDescription
(J35864)
Drift
NT671
Installing oil seal
Commercial Service ToolsNBTF0005
Tool name Description
Puller
NT077
Removing companion flange, clutch gear and
mainshaft gear bearing
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PREPARATION
Special Service Tools (Cont'd)
TF-9

IntroductionNBTF0013DESCRIPTIONNBTF0013S01When a malfunction (indicated by the 4WD warning lamp illumination) occurs, collect information first from the
customer about how the malfunction occurs. Then, proceed with the diagnosis presuming it is the cause. Also
inspect the electrical system, paying close attention to other possibilities such as fluid level and leaks.
All-mode 4WD transfer is controlled by transfer control unit and sensors.
If a malfunction occurs in the all-mode 4WD system, the 4WD warning lamp lights up to inform of the system
malfunction. There are two ways to identify the cause of the malfunction.
1) Performing the self-diagnosis. (The 4WD warning lamp will indicate what kind of malfunction has occurred
by flickering.)
2) Performing diagnosis using CONSULT-II.
DIAGNOSTIC WORKSHEETNBTF0013S02Information from CustomerNBTF0013S0201KEY POINTS
WHAT..... Vehicle model
WHEN..... Date, Frequencies
WHERE..... Road conditions
HOW..... Operating conditions, Symptoms
Information sheet from customer
Customer name MR/MS Model & Year VIN
Transfer model
ATX14AEngine Mileage
Incident Date Manuf. Date In Service Date
FrequencylContinuouslIntermittent ( times a day)
Symptomsl4WD shift indicator lamp does not turn on.
l4WD warning lamp does not turn on.
l4WD shift indicator lamp does not turn off.
lATP warning lamp does not turn on.
l4LO indicator lamp does not turn on.
l4WD shift indicator lamp does not indicate ª4Hº.
l4WD shift indicator lamp repeats flicking.
lTight corner braking symptom occurs.
l4WD system does not operate.
lOthers.
4WD warning lamplContinuously litlNot lit
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TROUBLE DIAGNOSIS Ð INTRODUCTION
Introduction
TF-41

SMT844DB
Replacing Oil SealNBTF0068FRONT CASE OIL SEALNBTF0068S011. Drain transfer fluid.
2. Remove exhaust front tube and heat insulator. Refer to
ªRemovalº, TF-119.
3. Remove front propeller shaft. Refer to PD-6, ªRemoval and
Installationº.
4. Remove companion flange lock nut.
IDo not reuse lock nut.
SMT112D
5. Put a matchmark on top of drive pinion thread. The mark
should be in line with the mark on the companion flange.
IAlways mark top of drive pinion screw using paint.
SMT802C
6. Remove companion flange.
SMT803C
7. Remove front case oil seal.
8. Install front case oil seal.
IBefore installing, apply multi-purpose grease to seal lip.
9. Install companion flange.
SMT845DB
10. Tighten nut to the specified torque.
Refer to TF-121.
11. Install front propeller shaft.
ON-VEHICLE SERVICE
Replacing Oil Seal
TF-116

SMT808D
SHIFT SHAFT OIL SEALNBTF0068S021. Remove front propeller shaft. Refer to PD-6, ªRemoval and
Installationº.
2. Remove companion flange. Refer to ªFRONT CASE OIL
SEALº, TF-116.
3. Remove actuator lever from transfer outer shift lever. Then
remove outer shift lever.
SMT491A
4. Remove shift shaft oil seal.
IBe careful not to damage cross shaft.
SMT805C
5. Install shift shaft oil seal.
IBefore installing, apply multi-purpose grease to seal lip.
6. Install transfer control linkage.
7. Install companion flange. Refer to ªFRONT CASE OIL SEALº,
TF-116.
8. Install front propeller shaft.
SMT892C
REAR OIL SEALNBTF0068S031. Remove rear propeller shaft. Refer to PD-6, ªRemoval and
Installationº.
2. Remove rear oil seal.
3. Install rear oil seal.
IBefore installing, apply multi-purpose grease to seal lip.
4. Install rear propeller shaft.
SMT874C
Transfer Motor
REMOVALNBTF00691. Disconnect transfer motor harness connector.
2. Remove breather pipe from transfer motor.
3. Remove bolts to detach transfer motor.
IAfter removing transfer motor, be sure to replace O-ring
with new one.
INSTALLATIONNBTF00701. Apply petroleum jelly or ATF to O-ring.
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ON-VEHICLE SERVICE
Replacing Oil Seal (Cont'd)
TF-117

2. Align width across flat-notch with oil pump groove, and install
transfer motor.
3. Tighten bolts.
: 41 - 48 N´m (4.2 - 4.9 kg-m, 30 - 35 ft-lb)
4. Install breather pipe to transfer motor.
5. Connect transfer motor harness connector.
SMT875C
Transfer Oil Filter
REMOVALNBTF0071IRemove bolts to detach oil filter.
IWhen removing oil filter from transfer, avoid damaging it.
Be sure to loosen bolts evenly.
IWhen removing oil filter, be sure to replace O-ring with
new one.
INSTALLATIONNBTF00721. Apply petroleum jelly or ATF to O-ring.
2. Tighten bolts evenly to install oil filter.
:7-9N´m(0.7 - 0.9 kg-m, 61 - 78 in-lb)
IBe sure not to damage oil filter.
ON-VEHICLE SERVICE
Transfer Motor (Cont'd)
TF-118

General SpecificationsNBTF0085
Transfer modelATX14A
Gear ratioHigh1.000
Low2.596
Number of teethPlanetary gearSun gear 57
Internal gear 91
Front drive sprocket 35
Front drive shaft 35
Fluid capacity(US qt, Imp qt)*3.0 (3-1/8, 2-5/8)
*: Refer to MA-11, ªFluids and Lubricantsº.
Inner Gear and Outer GearNBTF0086SUB-OIL PUMPNBTF0086S01
Allowable clearance 0.015 - 0.035 mm (0.0006 - 0.0014 in)
Gear thickness mm (in)Part No.*
Inner gear Outer gear
9.27 - 9.28 (0.3650 - 0.3654) 31346 0W462 31347 0W462
9.28 - 9.29 (0.3654 - 0.3657) 31346 0W461 31347 0W461
9.29 - 9.30 (0.3657 - 0.3661) 31346 0W460 31347 0W460
*: Always check with the Parts Department for the latest parts information.
MAIN OIL PUMPNBTF0086S02
Allowable clearance 0.015 - 0.035 mm (0.0006 - 0.0014 in)
Gear thickness mm (in)Part No.*
Inner gear Outer gear
14.67 - 14.68 (0.5776 - 0.5780) 31346 0W412 31347 0W412
14.68 - 14.69 (0.5780 - 0.5783) 31346 0W411 31347 0W411
14.69 - 14.70 (0.5783 - 0.5787) 31346 0W410 31347 0W410
*: Always check with the Parts Department for the latest parts information.
Control ValveNBTF0087VALVENBTF0087S01
Mounting position Part name Part No.* Outer dia. mm (in) Overall length mm (in)
L1 2-4 shift valve 31772 21X00 8.0 (0.315) 38.5 (1.516)
L2 Clutch valve 31772 80X11 10.0 (0.394) 40.0 (1.575)
L4 Pilot valve 31772 80X11 10.0 (0.394) 40.0 (1.575)
L5 Regulator valve 31741 0W410 12.0 (0.472) 68.0 (2.677)
*: Always check with the Parts Department for the latest parts information.
SPRINGNBTF0087S02
Mounting position Part name Part No.*Free length
mm (in)Outer dia.
mm (in)Wire dia. mm (in) Winding direction
L12-4 shift valve
spring31742 0W400 31.85 (1.2539) 7.0 (0.276) 0.6 (0.024) Clockwise
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SERVICE DATA AND SPECIFICATIONS (SDS)
General Specifications
TF-157

Mounting position Part name Part No.*Free length
mm (in)Outer dia.
mm (in)Wire dia. mm (in) Winding direction
L2 Clutch valve spring 31742 0W405 40.6 (1.598) 9.0 (0.354) 0.8 (0.031) Clockwise
L4 Pilot valve spring 31742 0W410 28.1 (1.106) 9.0 (0.354) 1.2 (0.047) Clockwise
L5Regulator valve
spring31742 0W415 39.7 (1.563) 11.0 (0.433) 1.3 (0.051) Clockwise
*: Always check with the Parts Department for the latest parts information.
ClutchNBTF0088DRIVE PLATENBTF0088S01
Part No.* Quantity Initial thickness mm (in) Limit value mm (in)
31532 0W410 8 2.0 (0.079) 1.8 (0.071)
*: Always check with the Parts Department for the latest parts information.
DRIVEN PLATENBTF0088S04
Part No.* Quantity Initial thickness mm (in) Limit value mm (in)
31536 0W410 14 2.0 (0.079) 0 (0) (steel plate)
*: Always check with the Parts Department for the latest parts information.
RETURN SPRINGNBTF0088S02
Stamped mark Part No.* Free length mm (in) Outer dia. mm (in) Wire dia. mm (in) Winding direction
1 31521 0W401 37.3 (1.496)
12.0 (0.472) 1.8 (0.071) Clockwise 2 31521 0W402 37.8 (1.488)
3 31521 0W403 38.4 (1.512)
4 31521 0W404 38.9 (1.531)
5 31521 0W405 39.4 (1.551)
6 31521 0W406 40.0 (1.575)
7 31521 0W407 36.8 (1.449)
8 31521 0W408 40.5 (1.594)
*: Always check with the Parts Department for the latest parts information.
RETAINING PLATENBTF0088S03
Standard end play 0.2 - 0.5 mm (0.008 - 0.020 in)
Measured value mm (in) Part No.* Thickness mm (in)
2.30 - 2.50 (0.0906 - 0.0984) 31537 0W410 2.1 (0.083)
2.50 - 2.70 (0.0984 - 0.1063) 31537 0W411 2.3 (0.091)
2.70 - 2.90 (0.1063 - 0.1142) 31537 0W412 2.5 (0.098)
2.90 - 3.10 (0.1142 - 0.1220) 31537 0W413 2.7 (0.106)
3.10 - 3.30 (0.1220 - 0.1299) 31537 0W414 2.9 (0.114)
3.30 - 3.50 (0.1299 - 0.1378) 31537 0W415 3.1 (0.122)
3.50 - 3.70 (0.1378 - 0.1457) 31537 0W416 3.3 (0.130)
3.70 - 3.90 (0.1457 - 0.1535) 31537 0W417 3.5 (0.138)
3.90 - 4.10 (0.1535 - 0.1614) 31537 0W418 3.7 (0.146)
4.10 - 4.30 (0.1614 - 0.1693) 31537 0W419 3.9 (0.154)
SERVICE DATA AND SPECIFICATIONS (SDS)
Control Valve (Cont'd)
TF-158

Standard end play 0.2 - 0.5 mm (0.008 - 0.020 in)
Measured value mm (in) Part No.* Thickness mm (in)
4.30 - 4.50 (0.1693 - 0.1772) 31537 0W420 4.1 (0.161)
4.50 - 4.70 (0.1772 - 0.1850) 31537 0W421 4.3 (0.169)
4.70 - 4.90 (0.1850 - 0.1929) 31537 0W422 4.5 (0.177)
4.90 - 5.10 (0.1929 - 0.2008) 31537 0W423 4.7 (0.185)
*: Always check with the Parts Department for the latest parts information.
Seal Ring (Mainshaft side)NBTF0089
Standard clearance
Limit clearance0.05 - 0.30 mm (0.0020 - 0.0118 in)
0.30 mm (0.0118 in)
Part No.* Outer dia. mm (in) Inner dia. mm (in) Thickness mm (in)
31525 0W410 40.8 (1.606) 36.9 (1.453) 1.97 (0.471)
*: Always check with the Parts Department for the latest parts information.
Bearing Race (Thrust needle bearing side)NBTF0090
Standard end play 0.1 - 0.25 mm (0.0039 - 0.0098 in)
End play (Dimension ªEº) mm (in) Part No.* Thickness mm (in)
1.785 - 1.800 (0.0703 - 0.0709) 31439 0W410 1.6 (0.063)
1.800 - 1.900 (0.0709 - 0.0748) 31439 0W411 1.7 (0.067)
1.900 - 2.000 (0.0748 - 0.0787) 31439 0W412 1.8 (0.071)
2.000 - 2.100 (0.0787 - 0.0827) 31439 0W413 1.9 (0.075)
2.100 - 2.200 (0.0827 - 0.0866) 31439 0W414 2.0 (0.079)
2.200 - 2.270 (0.0866 - 0.0894) 31439 0W415 2.1 (0.083)
*: Always check with the Parts Department for the latest parts information.
Snap Ring (Sun gear side)NBTF0091
Standard end play 0 - 0.15 mm (0 - 0.0059 in)
End play (Dimension ªFº) mm (in) Part No.* Thickness mm (in)
2.40 - 2.50 (0.0945 - 0.0984) 33112 0W411 2.4 (0.094)
2.50 - 2.60 (0.0984 - 0.1024) 33112 0W412 2.5 (0.098)
2.60 - 2.70 (0.1024 - 0.1063) 33112 0W413 2.6 (0.102)
*: Always check with the Parts Department for the latest parts information.
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SERVICE DATA AND SPECIFICATIONS (SDS)
Clutch (Cont'd)
TF-159