2001 INFINITI QX4 checking oil

2WD, 4WD model
8.5(9 US qt, 7-1/2 Imp qt)
Drain plug:
: 29 - 39 N´m (3.0 - 4.0 kg-m, 22 - 29 ft-lb)
4. Run engine at idle speed for five minutes.
5. Check fluid level and condition. Refer to MA-21, ªChecking A/T
Fluidº. If fluid is still dirty, repeat steps 2 through 5.
SMA439B
Checking All-mode 4WD Transfer FluidNBMA0022Check for oil leakage and fluid level.
A/T fluid is used for the all-mode 4WD transfer in the factory.
Never start engine while checking fluid level.
Filler plug:
: 10 - 20 N´m (1.0 - 2.0 kg-m, 87 - 174 in-lb)
SMA444B
Changing All-mode 4WD Transfer FluidNBMA0023When changing all-mode 4WD transfer fluid completely, A/T fluid
may be used.
Fluid grade:
Nissan Matic ªDº (Continental U.S. and Alaska) or
Canada NISSAN Automatic Transmission Fluid.
Refer to ªFluids and Lubricantsº, ªRECOMMENDED
FLUIDS AND LUBRICANTSº, MA-11.
Fluid capacity:
3.0(3-1/8 US qt, 2-5/8 Imp qt)
Drain plug:
: 10 - 20 N´m (1.0 - 2.0 kg-m, 87 - 174 in-lb)
CHASSIS AND BODY MAINTENANCE
Changing A/T Fluid (Cont'd)
MA-22

SMA231
SMA872C
Checking Propeller ShaftNBMA0024Check propeller shaft for damage, looseness or grease leakage.
Tightening torque: Refer to PD-4, ªComponentsº.
SMA873C
Greasing Propeller ShaftNBMA0025Apply specified grease to nipples provided on propeller shaft.
Grease grade:
Refer to ªRECOMMENDED FLUIDS AND
LUBRICANTSº, MA-11.
SMA440B
Checking Differential Gear OilNBMA0026Check for oil leakage and oil level.
Filler plug:
Front
: 39 - 59 N´m (4 - 6 kg-m, 29 - 43 ft-lb)
Rear
: 59 - 118 N´m (6 - 12 kg-m, 43 - 87 ft-lb)
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CHASSIS AND BODY MAINTENANCE
Checking Propeller Shaft
MA-23

PROPELLER SHAFT &
DIFFERENTIAL CARRIER
SECTION
PD
CONTENTS
PROPELLER SHAFT......................................................3
Noise, Vibration and Harshness (NVH)
Troubleshooting ...........................................................3
NVH TROUBLESHOOTING CHART............................3
Components.................................................................4
FRONT PROPELLER SHAFT.....................................4
REAR PROPELLER SHAFT.......................................5
On-vehicle Service.......................................................6
PROPELLER SHAFT VIBRATION...............................6
APPEARANCE CHECKING........................................6
Removal and Installation .............................................6
Inspection.....................................................................7
Disassembly.................................................................7
CENTER BEARING - 2WD -.......................................7
JOURNAL (71H AND 80B)..........................................8
Assembly .....................................................................9
CENTER BEARING - 2WD -.......................................9
JOURNAL (71H AND 80B)..........................................9
Service Data and Specifications (SDS)..................... 11
GENERAL SPECIFICATIONS................................... 11
SERVICE DATA....................................................... 11
SNAP RING (80B).................................................... 11
SNAP RING (71H)...................................................12
R200A
FRONT FINAL DRIVE...................................................13
Preparation ................................................................13
SPECIAL SERVICE TOOLS......................................13
Noise, Vibration and Harshness (NVH)
Troubleshooting .........................................................15
On-vehicle Service.....................................................15
FRONT OIL SEAL REPLACEMENT...........................15
REAR COVER GASKET REPLACEMENT..................16
Components...............................................................17
Removal and Installation ...........................................18
REMOVAL...............................................................18
INSTALLATION........................................................18
Disassembly...............................................................18
PRE-INSPECTION...................................................18
FINAL DRIVE HOUSING..........................................19
DIFFERENTIAL CASE..............................................21
DIFFERENTIAL SIDE SHAFT...................................22
Inspection...................................................................23
RING GEAR AND DRIVE PINION.............................23
DIFFERENTIAL CASE ASSEMBLY...........................23
BEARING................................................................23
Adjustment .................................................................24
SIDE BEARING PRELOAD.......................................24
PINION GEAR HEIGHT AND PINION BEARING
PRELOAD
...............................................................25
TOOTH CONTACT...................................................29
Assembly ...................................................................30
DIFFERENTIAL SIDE SHAFT...................................30
DIFFERENTIAL CASE..............................................31
FINAL DRIVE HOUSING..........................................32
Service Data and Specifications (SDS).....................36
R200A.....................................................................36
H233B
REAR FINAL DRIVE.....................................................38
Preparation ................................................................38
SPECIAL SERVICE TOOLS......................................38
Noise, Vibration and Harshness (NVH)
Troubleshooting .........................................................40
On-vehicle Service.....................................................40
FRONT OIL SEAL REPLACEMENT...........................40
Components...............................................................42
Removal and Installation ...........................................43
REMOVAL...............................................................43
INSTALLATION........................................................43
Disassembly...............................................................43
PRE-INSPECTION...................................................43
DIFFERENTIAL CARRIER........................................44
DIFFERENTIAL CASE..............................................46
Inspection...................................................................47
RING GEAR AND DRIVE PINION.............................47
DIFFERENTIAL CASE ASSEMBLY...........................47
BEARING................................................................47
Limited Slip Differential ..............................................47
PREPARATION FOR DISASSEMBLY........................47
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SPD560
15. Apply multi-purpose grease to cavity at sealing lips of oil seal.
Install side oil seal.
Tool number: KV38100200 (J26233)
SPD513
16. Measure ring gear to drive pinion backlash with a dial indica-
tor.
Ring gear-to-drive pinion backlash:
0.10 - 0.15 mm (0.0039 - 0.0059 in)
IIf backlash is too small, decrease thickness of right shim and
increase thickness of left shim by the same amount.
If backlash is too great, reverse the above procedure.
Never change the total amount of shims as it will change the
bearing preload.
SPD664
17. Check total preload with Tool.
When checking preload, turn drive pinion in both direc-
tions several times to set bearing rollers.
Tool number: ST3127S000 (J25765-A)
Total preload:
P
1+ [0.3 - 1.5 N´m (3 - 15 kg-cm, 2.6 - 13.0 in-lb)]
P
1: Drive pinion preload
SPD561
IIf preload is too great, remove the same amount of shim from
each side.
IIf preload is too small, add the same amount of shim to each
side.
Never add or remove a different number of shims for each side
as it will change ring gear to drive pinion backlash.
18. Recheck ring gear to drive pinion backlash because increase
or decrease in thickness of shims will cause change of ring
gear-to-pinion backlash.
SPD524
19. Check runout of ring gear with a dial indicator.
Runout limit:
0.05 mm (0.0020 in)
IIf backlash varies excessively in different places, the variance
may have resulted from foreign matter caught between the ring
gear and the differential case.
IIf the backlash varies greatly when the runout of the ring gear
is within a specified range, the hypoid gear set or differential
case should be replaced.
20. Check tooth contact. Refer to ªTOOTH CONTACTº, PD-29.
21. Install rear cover and gasket.
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FRONT FINAL DRIVER200A
Assembly (Cont'd)
PD-35

Tool number
(Kent-Moore No.)
Tool nameDescription
(J25269-18)
Side bearing discs
(2 Req'd)
NT135
Selecting pinion height adjusting washer
KV381052S0
(Ð)
Rear axle shaft dummy
1 KV38105210
(Ð)
Torque wrench side
2 KV38105220
(Ð)
Vice side
NT142
Checking differential torque on limited slip differen-
tial
KV38100500
(J25273)
Gear carrier front oil
seal drift
NT115
Installing front oil seal
a: 85 mm (3.35 in) dia.
b: 60 mm (2.36 in) dia.
Noise, Vibration and Harshness (NVH)
Troubleshooting
NBPD0051Refer to ªNVH TROUBLESHOOTING CHARTº, PD-3.
SPD479A
On-vehicle Service
FRONT OIL SEAL REPLACEMENTNBPD00301. Remove propeller shaft.
2. Loosen drive pinion nut.
Tool number: KV38108300 (J44195)
SPD737
3. Remove companion flange.
REAR FINAL DRIVEH233B
Preparation (Cont'd)
PD-40

SPD149
SPD684
9. Turn drive pinion in both directions several times, and measure
pinion bearing preload.
Tool number: ST3127S000 (J25765-A)
Pinion bearing preload (Without front oil seal):
1.2 - 2.0 N´m (12 - 20 kg-cm, 10 - 17 in-lb)
If preload is out of specification, adjust the thickness of spacer and
shim combination by replacing shim and spacer with thinner one.
IStart from the combination of thickest spacer and shim.
ICombine each spacer and shim thickness one by one until the
correct specification are achieved.
Drive pinion bearing preload adjusting spacer and
shim:
Refer to SDS, PD-64.
10. Install differential case assembly with side bearing outer races
into gear carrier.
11. Position side bearing adjusters on gear carrier with threads
properly engaged; screw in adjusters lightly at this stage of
assembly.
Tool number: ST32580000 (J34312)
SPD265
12. Align mark on bearing cap with that on gear carrier and install
bearing cap on gear carrier.
IDo not tighten at this point to allow further tightening of side
bearing adjusters.
SPD246
13. Tighten both right and left side bearing adjusters alternately
and measure ring gear backlash and total preload at the same
time. Adjust right and left side bearing adjusters by tightening
them alternately so that proper ring gear backlash and total
preload can be obtained.
Ring gear-to-drive pinion backlash:
0.13 - 0.18 mm (0.0051 - 0.0071 in)
SPD149
IWhen checking preload, turn drive pinion in both direc-
tions several times to set bearing rollers.
Tool number: ST3127S000 (J25765-A)
Total preload:
P
1+ [0.3 - 0.4 N´m (3 - 4 kg-cm, 2.6 - 3.5 in-lb)]
P
1: Drive pinion preload
REAR FINAL DRIVEH233B
Assembly (Cont'd)
PD-60

STEERING SYSTEM
SECTION
ST
CONTENTS
PRECAUTIONS...............................................................2
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...............2
Precautions for Steering System .................................2
PREPARATION...............................................................3
Special Service Tools ..................................................3
Commercial Service Tools ...........................................5
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING.....................................................6
NVH Troubleshooting Chart.........................................6
ON-VEHICLE SERVICE..................................................7
Checking Steering Wheel Play ....................................7
Checking Neutral Position on Steering Wheel ............7
PRE-CHECKING........................................................7
CHECKING...............................................................7
Front Wheel Turning Angle ..........................................7
Checking Gear Housing Movement ............................8
Adjusting Rack Retainer ..............................................8
Checking and Adjusting Drive Belts ............................8
Checking Fluid Level ...................................................8
Checking Fluid Leakage ..............................................8
Bleeding Hydraulic System..........................................9
Checking Steering Wheel Turning Force ....................9
Checking Hydraulic System.......................................10
STEERING WHEEL AND STEERING COLUMN......... 11
Components............................................................... 11
Removal and Installation ........................................... 11
STEERING WHEEL................................................. 11
STEERING COLUMN...............................................12
Disassembly and Assembly .......................................13
Inspection...................................................................14
TILT MECHANISM...................................................14
STEERING TRANSFER GEAR.....................................15
Removal .....................................................................15
Installation ..................................................................16
Inspection...................................................................16
POWER STEERING GEAR AND LINKAGE................17
Components...............................................................17
Removal and Installation ...........................................18
Disassembly...............................................................19
Inspection...................................................................20
BOOT.....................................................................20
RACK.....................................................................20
PINION ASSEMBLY.................................................20
GEAR HOUSING CYLINDER....................................20
TIE-ROD OUTER AND INNER SOCKETS..................21
Assembly ...................................................................21
Adjustment .................................................................24
POWER STEERING OIL PUMP....................................27
Components...............................................................27
Pre-disassembly Inspection .......................................27
Disassembly...............................................................28
Inspection...................................................................29
Assembly ...................................................................29
SERVICE DATA AND SPECIFICATIONS (SDS).........32
General Specifications ...............................................32
Steering Wheel ..........................................................32
Steering Column ........................................................32
Steering Transfer Gear ..............................................32
Steering Gear and Linkage .......................................33
Power Steering ..........................................................33
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SST601C
Checking Gear Housing MovementNBST00081. Check the movement of steering gear housing during station-
ary steering on a dry paved surface.
IApply a force of 49 N (5 kg, 11 lb) to steering wheel to check
the gear housing movement.
Turn off ignition key while checking.
Movement of gear housing:
±2mm(±0.08 in) or less
2. If movement exceeds the limit, replace mount insulator after
confirming proper installation of gear housing clamps.
SST602C
Adjusting Rack RetainerNBST0009IPerform this driving test on a flat road.
a) Check whether vehicle moves in a straight line when steering
wheel is released.
b) Check whether steering wheel returns to neutral position when
steering wheel is released from a slightly turned (approx. 20É)
position.
IIf any abnormality is found, correct it by resetting adjusting
screw.
Checking and Adjusting Drive BeltsNBST0010Refer to MA-13, ªChecking Drive Beltsº.
SST280BA
Checking Fluid LevelNBST0011Check fluid level.
Use the correct range of the dipstick depending on the fluid tem-
perature. Use the ªHOTº range at 50 to 80ÉC (122 to 176ÉF), or the
ªCOLDº range at 0 to 30ÉC (32 to 86ÉF).
CAUTION:
IDo not overfill.
IRecommended fluid is Genuine Nissan PSF II or equiva-
lent. Refer to MA-11, ªFluids and Lubricantsº.
SST458C
Checking Fluid LeakageNBST0012Check the lines for improper attachment and for leaks, cracks,
damage, loose connections, chafing and deterioration.
1. Run engine between idle speed and 1,000 rpm.
Make sure temperature of fluid in oil tank rises to 60 to 80ÉC
(140 to 176ÉF).
2. Turn steering wheel right-to-left several times.
3. Hold steering wheel at each ªlockº position for five seconds
and carefully check for fluid leakage.
ON-VEHICLE SERVICE
Checking Gear Housing Movement
ST-8