2001 INFINITI QX4 differential

Preparation
SPECIAL SERVICE TOOLSNBPD0029The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number
(Kent-Moore No.)
Tool nameDescription
ST3127S000
(See J25765-A)
Preload gauge
1 GG91030000
(J25765)
Torque wrench
2 HT62940000
(Ð)
Socket adapter
3 HT62900000
(Ð)
Socket adapter
NT124
Measuring pinion bearing preload and total preload
ST06340000
(J24310, J34310)
Differential attachment
NT140
Mounting final drive
ST32580000
(J34312)
Differential side bearing
adjusting nut wrench
NT141
Adjusting side bearing preload and backlash (ring
gear-drive pinion)
KV38108300
(J44195)
Companion flange
wrench
NT771
Removing and installing propeller shaft lock nut,
and drive pinion lock nut
ST3090S000
(Ð)
Drive pinion rear inner
race puller set
1 ST30031000
(J22912-01)
Puller
2 ST30901000
(J26010-01)
Base
NT527
Removing and installing drive pinion rear inner
cone
a: 79 mm (3.11 in) dia.
b: 45 mm (1.77 in) dia.
c: 35 mm (1.38 in) dia.
ST3306S001
Differential side bearing
puller set
1 ST33051001
(J22888-20)
Body
2 ST33061000
(J8107-2)
Adapter
NT072
Removing and installing differential side bearing
inner cone
a: 28.5 mm (1.122 in) dia.
b: 38 mm (1.50 in) dia.
REAR FINAL DRIVEH233B
Preparation
PD-38

Tool number
(Kent-Moore No.)
Tool nameDescription
ST33190000
(J25523)
Differential side bearing
drift
NT085
Installing side bearing inner cone
a: 52 mm (2.05 in) dia.
b: 45.5 mm (1.791 in) dia.
c: 34 mm (1.34 in) dia.
ST33081000
(Ð)
Side bearing puller
adapter
NT431
Installing side bearing inner cone
a: 43 mm (1.69 in) dia.
b: 33.5 mm (1.319 in) dia.
ST30611000
(J25742-1)
Drift
NT090
Installing pinion rear bearing outer race
(Use with ST30621000 or ST30613000)
ST30621000
(J25742-5)
Drift
NT073
Installing pinion rear bearing outer race
a: 79 mm (3.11 in) dia.
b: 59 mm (2.32 in) dia.
ST30613000
(J25742-3)
Drift
NT073
Installing pinion front bearing outer race
(Use with ST30611000)
a: 72 mm (2.83 in) dia.
b: 48 mm (1.89 in) dia.
KV381025S0
(Ð)
Oil seal fitting tool
1 ST30720000
(J25405)
Drift bar
2 KV38102510
(Ð)
Drift
NT525
Installing front oil seal
a: 77 mm (3.03 in) dia.
b: 55 mm (2.17 in) dia.
c: 71 mm (2.80 in) dia.
d: 65 mm (2.56 in) dia.
(J34309)
Differential shim selec-
tor
NT134
Adjusting bearing pre-load and gear height
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REAR FINAL DRIVEH233B
Preparation (Cont'd)
PD-39

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

SPD247
IRing gear runout
Check runout of ring gear with a dial indicator.
Runout limit:
0.08 mm (0.0031 in)
SPD004
ITooth contact
Check tooth contact. Refer to ªTOOTH CONTACTº, PD-56.
ISide gear to pinion mate gear backlash
Measure clearance between side gear thrust washer and dif-
ferential case with a feeler gauge.
Clearance between side gear thrust washer and differ-
ential case:
0.10 - 0.20 mm (0.0039 - 0.0079 in)
SPD683
DIFFERENTIAL CARRIERNBPD0033S021. Mount final drive assembly on Tool.
Tool number:
ST06340000 (J24310, J34310)
SPD249
2. Put matchmarks on one side of side bearing cap with paint or
punch to ensure that it is replaced in proper position during
reassembly.
Bearing caps are line-bored during manufacture and should
be put back in their original places.
SPD250
3. Remove side lock fingers and side bearing caps.
REAR FINAL DRIVEH233B
Disassembly (Cont'd)
PD-44

SPD684
4. Remove side bearing adjuster with Tool.
Tool number: ST32580000 (J34312)
SPD685
5. Remove differential case assembly with a pry bar.
SPD011
Be careful to keep the side bearing outer races together with
their respective inner cones Ð do not mix them up.
SPD480A
6. Remove drive pinion nut with Tool.
Tool number: KV38108300 (J44195)
7. Remove companion flange with puller.
SPD687
8. Take out drive pinion together with pinion rear bearing inner
cone, drive pinion bearing spacer and pinion bearing adjusting
shim.
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REAR FINAL DRIVEH233B
Disassembly (Cont'd)
PD-45

SPD563
9. Remove front oil seal and pinion front bearing inner cone.
10. Remove pinion bearing outer races with a brass drift.
SPD018
11. Remove pinion rear bearing inner cone and drive pinion adjust-
ing washer.
Tool number: ST30031000 (J22912-01)
SPD207A
DIFFERENTIAL CASENBPD0033S031. Remove side bearing inner cones.
To prevent damage to bearing, engage puller jaws in
groove.
Tool number:
A ST33051001 (J22888-20)
B ST33061000 (J8107-2)
SPD022
Be careful not to confuse the left and right hand parts.
Keep bearing and bearing race for each side together.
SPD024
2. Loosen ring gear bolts in a criss-cross pattern.
3. Tap ring gear off differential case with a soft hammer.
Tap evenly all around to keep ring gear from binding.
REAR FINAL DRIVEH233B
Disassembly (Cont'd)
PD-46

SPD025
4. Drive out pinion mate shaft lock pin, with punch from ring gear
side.
Lock pin is calked at pin hole mouth on differential case.
InspectionNBPD0034RING GEAR AND DRIVE PINIONNBPD0034S01Check gear teeth for scoring, cracking or chipping.
If any damaged part is evident, replace ring gear and drive pinion
as a set (hypoid gear set).
SPD530-A
DIFFERENTIAL CASE ASSEMBLYNBPD0034S02Check mating surfaces of differential case, side gears, pinion mate
gears, pinion mate shaft, and thrust washers.
SPD715
BEARINGNBPD0034S031. Thoroughly clean bearing.
2. Check bearings for wear, scratches, pitting or flaking.
Check tapered roller bearing for smooth rotation. If damaged,
replace outer race and inner cone as a set.
SPD415
Limited Slip Differential
PREPARATION FOR DISASSEMBLYNBPD0035Checking Differential TorqueNBPD0035S01Measure differential torque with Tool.
If it is not within the specifications, inspect components of limited
slip differential.
Differential torque:
88 - 108 N´m (9 - 11 kg-m, 65 - 80 ft-lb)
Tool number: A KV38105210 ( Ð )
Tool number: B KV38105220 ( Ð )
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REAR FINAL DRIVEH233B
Disassembly (Cont'd)
PD-47

DISASSEMBLYNBPD0036
SPD404A
CAUTION:
Do not run engine when one wheel (rear) is off the ground.
SPD275
1. Remove side bearing inner cone with Tool.
2. Loosen ring gear bolts in a criss-cross pattern.
3. Tap ring gear off gear case with a soft hammer.
Tap evenly all around to keep ring gear from binding.
SPD363A
4. Remove couple bolts on differential cases A and B with a
press.
Tool number: ST33081000 ( Ð )
5. Separate differential case A and B.
Draw out component parts (discs and plates, etc.).
Put marks on gears and pressure rings so that they can be
reinstalled in their original positions from which they were
removed.
REAR FINAL DRIVEH233B
Limited Slip Differential (Cont'd)
PD-48