2001 INFINITI QX4 torque

Service Data and Specifications (SDS)
H233B=NBPD0042General SpecificationsNBPD0042S01
Rear final drive2WD 4WD
Standard Optional
H233B
2-pinion LSD
Gear ratio4.363
Number of teeth (Ring gear/drive pinion) 48/11
Oil capacity (Approx.)(US pt, lmp pt) 2.8 (5-7/8, 4-7/8)
Ring Gear RunoutNBPD0042S02
Ring gear runout limit mm (in)0.08 (0.0031)
Side Gear AdjustmentNBPD0042S03
Side gear backlash (Clearance between side gear and differential case) mm (in) 0.10 - 0.20 (0.0039 - 0.0079)
Available side
gear thrust
washersThickness mm (in) Part number*
1.75 (0.0689)
1.80 (0.0709)
1.85 (0.0728)38424-T5000
38424-T5001
38424-T5002
*: Always check with the Parts Department for the latest parts information.
Differential Torque Adjustment (LSD models)NBPD0042S04
Differential torque N´m (kg-m, ft-lb) 88 - 108 (9 - 11, 65 - 80)
Number of discs and plates (One
side)Friction disc 2
Friction plate 9
Spring plate 2
Wear limit of plate and disc mm (in) 0.1 (0.004)
Allowable warpage of friction disc and plate mm (in) 0.08 (0.0031)
Available discs
and platesPlate name Thickness mm (in) Part number*
Friction disc1.48 - 1.52 (0.0583 - 0.0598)
1.38 - 1.42 (0.0543 - 0.0559)
1.58 - 1.62 (0.0622 - 0.0638)38433-C6002 (Standard type)
38433-C6004 (Adjusting type)
38433-C6003 (Adjusting type)
Friction plate1.48 - 1.52 (0.0583 - 0.0598)
1.38 - 1.42 (0.0543 - 0.0559)
1.58 - 1.62 (0.0622 - 0.0638)38432-C6001
38432-C6002
38432-C6003
Spring plate 1.48 - 1.52 (0.0583 - 0.0598) 38435-S9200
*: Always check with the Parts Department for the latest parts information.
Total Preload AdjustmentNBPD0042S05
Total preload N´m (kg-cm, in-lb) P1+ [0.3 - 0.4 (3 - 4, 2.6 - 3.5)]
Ring gear backlash mm (in) 0.13 - 0.18 (0.0051 - 0.0071)
Side bearing adjusting methodSide adjuster
P1: Drive pinion preload
REAR FINAL DRIVEH233B
Service Data and Specifications (SDS)
PD-62

Special Service ToolsNBST0003The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
KV48100700
(J26364)
Torque adapter
NT169
Measuring pinion rotating torque
ST35300000
(Ð)
Drift
NT073
Installing power steering oil pump oil seal
a: 59 mm (2.32 in) dia.
b: 45 mm (1.77 in) dia.
ST27180001
(J25726-A)
Steering wheel puller
NT544
Removing steering wheel
ST29020001
(J24319-01)
Ball joint remover
NT694
Removing ball joint
a: 34 mm (1.34 in)
b: 6.5 mm (0.256 in)
c: 61.5 mm (2.421 in)
KV48103500
(J26357 and J26357-10)
Pressure gauge
NT547
Measuring oil pressure
KV48102500
(Ð)
Pressure gauge adapter
NT542
Measuring oil pressure
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
PREPARATION
Special Service Tools
ST-3

Tool number
(Kent-Moore No.)
Tool nameDescription
ST3127S000
(See J25765-A)
1 GG91030000
(J25765-A)
Torque wrench
2 HT62940000
(Ð)
Socket adapter
3 HT62900000
(Ð)
Socket adapter
NT541
Measuring turning torque
KV48104400
(Ð)
Rack seal ring reformer
NT550
Reforming teflon ring
a: 50 mm (1.97 in) dia.
b: 36 mm (1.42 in) dia.
c: 100 mm (3.94 in)
KV48103400
(Ð)
Torque adapter
NT236
Measuring steering transfer gear rotating
torque
KV48104200
(Ð)
Rear cover wrench
NT540
Removing and installing gear housing end
cover
a: 4 mm (0.16 in) dia.
b: 5 mm (0.20 in)
c: 3 mm (0.12 in) dia.
d: 5 mm (0.20 in)
(J43995)
Steering lock nut wrench
NT838
Adjusting steering pinion rotating torque
(J43996)
Steering rack adjustment
wrench
NT839
Adjusting steering pinion rotating torque
(J-44372)
Spring gauge
LST024
Measuring steering wheel turning force
PREPARATION
Special Service Tools (Cont'd)
ST-4

NBST0043
NVH Troubleshooting ChartNBST0043S01Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
Reference pageST-8
ST-9
ST-21
ST-21
ST-21
ST-8
ST-7
ST-9
MA-13
Ð
ST-13
ST-8
ST-13
ST-13
ST-17
PD-3
PD-3
AX-3
AX-3
SU-3
SU-3
SU-3
BR-6
Possible cause and
SUSPECTED PARTS
Fluid level
Air in hydraulic system
Tie-rod ball joint swinging force
Tie-rod ball joint rotating torque
Tie-rod ball joint end play
Steering gear fluid leakage
Steering wheel play
Steering gear rack sliding force
Drive belt looseness
Improper steering wheel
Improper installation or looseness or tilt lock lever
Mounting rubber deterioration
Steering column deformation or damage
Improper installation or looseness of steering column
Steering linkage looseness
PROPELLER SHAFT
DIFFERENTIAL
DRIVE SHAFT
AXLE
SUSPENSION
TIRES
ROAD WHEEL
BRAKES
Symp-
tomSTEERINGNoise´´´´´´´´´ ´´´´´´´´
Shake´´´ ´ ´´´´´´
Vibration´´´´´ ´ ´´´´
Shimmy´´´ ´ ´´´´´
Judder´ ´ ´´´´´
´: Applicable
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting Chart
ST-6

SST847C
InstallationNBST00221. Set wheels in the straight-ahead position.
2. Install transfer gear assembly.
3. Install column lower joint while aligning groove with protrusions
on the steering gear rear cover cap.
4. Tighten bolt while aligning groove on steering gear. Before
tightening bolt, ensure it is inserted correctly.
SST848C
5. When attaching steering column upper and lower joint to trans-
fer gear, it must be positioned as shown in figure at left.
SST707CA
InspectionNBST0024Do not disassemble steering transfer gear assembly.
ICheck that steering transfer gear assembly operates smoothly.
Also check for grease leakage, deformation and damage.
Replace steering transfer gear assembly if necessary.
ICheck rotating torque at input shaft in 360É and in both direc-
tions.
Rotating torque:
0.25 - 0.69 N´m (2.5 - 7.0 kg-cm, 2.2 - 6.1 in-lb)
If rotating torque is out of specification, replace steering trans-
fer gear assembly.
STEERING TRANSFER GEAR
Installation
ST-16

Removal and InstallationNBST0027
SST614C
1. Gear and linkage assembly
2. Rack mounting insulator3. Gear housing mounting bracket 4. Cotter pin
SFA756B
CAUTION:
IThe rotation of the spiral cable (SRS ªAIR BAGº compo-
nent part) is limited. If the steering gear must be removed,
set the front wheels in the straight-ahead direction. Do not
rotate the steering column while the steering gear is
removed.
IRemove the steering wheel before removing the steering
lower joint to avoid damaging the SRS spiral cable.
IDetach tie-rod outer sockets from knuckle arms with Tool.
SST615C
IInstall pipe connector.
IObserve specified tightening torque when tightening high-pres-
sure and low-pressure pipe connectors. Excessive tightening
will damage threads of connector or O-ring.
Connector tightening torque:
Low-pressure side ª1º
30 - 35 N´m (3.1 - 3.6 kg-m, 22 - 26 ft-lb)
High-pressure side ª2º
30 - 35 N´m (3.1 - 3.6 kg-m, 22 - 26 ft-lb)
IThe O-ring in low-pressure pipe connector is larger than that
POWER STEERING GEAR AND LINKAGE
Removal and Installation
ST-18

in high-pressure connector. Take care to install the proper
O-ring.
SST616C
IInitially, tighten nut on tie-rod outer socket and knuckle arm to
64 to 69 N´m (6.5 to 7.0 kg-m, 47 to 51 ft-lb). Then tighten fur-
ther to align nut groove with first pin hole so that cotter pin can
be installed.
CAUTION:
Tightening torque must not exceed 108 N´m (11.0 kg-m, 80 ft-
lb).
SST819A
IBefore removing steering column lower joint from gear, set
gear in neutral (wheels in straight-ahead position). After
removing steering column lower joint, put matching mark on
pinion shaft and pinion housing to record neutral position.
ITo install, set left and right dust boots to equal deflection.
Attach steering column lower joint by aligning matching marks
of pinion shaft and pinion housing.
SST617C
ITighten gear housing mounting bracket bolts in the order
shown.
Secure tightening torque:
118 - 137 N´m (12 - 14 kg-m, 87 - 101 ft-lb)
SST718CA
DisassemblyNBST00281. Prior to disassembling, measure pinion rotating torque. Record
the pinion rotating torque as a reference.
IBefore measuring, disconnect cylinder tube and drain
fluid.
IUse soft jaws when holding steering gear housing. Handle
gear housing carefully, as it is made of aluminum. Do not
grip cylinder in a vise.
2. Remove pinion gear.
Be careful not to damage pinion gear when removing pinion
seal ring.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
POWER STEERING GEAR AND LINKAGE
Removal and Installation (Cont'd)
ST-19

SST468C
TIE-ROD OUTER AND INNER SOCKETSNBST0029S05ICheck ball joints for swinging force.
Tie-rod outer and inner ball joints swinging force ªAº:
Refer to SDS, ST-33.
ICheck ball joint for rotating torque.
Tie-rod outer ball joint rotating torque ªBº:
Refer to SDS, ST-33.
ICheck ball joints for axial end play.
Tie-rod outer and inner ball joints axial end play ªCº:
Refer to SDS, ST-33.
ICheck condition of dust cover. If cracked excessively, replace
outer tie-rod.
SST083B
AssemblyNBST00301. Using a heat gun, heat new teflon rack seal ring to approxi-
mately 40ÉC (104ÉF). Then place it onto rack.
SBR132C
2. Using Tool, compress rack seal ring securely on rack.
Always insert Tool from the rack gear side.
SST201A
3. Insert new rack oil seal.
IPlace plastic film into rack oil seal to prevent damage by
rack teeth.
IDo not forget to remove plastic film after rack oil seal is
positioned properly.
IMake sure lips of rack oil seal face each other.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
POWER STEERING GEAR AND LINKAGE
Inspection (Cont'd)
ST-21