differential INFINITI QX4 2001 Factory Owner's Manual

SPD524
IRing gear runout
Check runout of ring gear with a dial indicator.
Runout limit:
0.05 mm (0.0020 in)
ITooth contact
Check tooth contact. Refer to ªTOOTH CONTACTº, PD-29.
SPD665
ISide gear to pinion mate gear backlash
Using a feeler gauge, measure clearance between side gear
thrust washer and differential case.
Clearance between side gear thrust washer and differ-
ential case:
Less than 0.15 mm (0.0059 in)
SPD666
FINAL DRIVE HOUSINGNBPD0018S021. Using three spacers [20 mm (0.79 in)], mount final drive
assembly on Tool.
Tool number:
KV38100800 (J34310, J25604-01)
SPD644
2. Remove differential side shaft assembly.
SPD667
3. Remove differential side flange.
GI
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LC
EC
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TF
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RS
BT
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IDX
FRONT FINAL DRIVER200A
Disassembly (Cont'd)
PD-19

SPD526
4. 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.
PD343
5. Remove side bearing caps.
SPD668
6. Remove differential case assembly with a pry bar.
SPD527
Be careful to keep the side bearing outer races together with
their respective inner cones Ð do not mix them up.
CAUTION:
Side bearing spacer is placed on either the left or right
depending upon final drive gear ratio. It should be labeled so
that it may be replaced correctly.
SPD477A
7. Loosen drive pinion nut.
Tool number: KV38108300 (J44195)
8. Remove companion flange with puller.
FRONT FINAL DRIVER200A
Disassembly (Cont'd)
PD-20

SPD670
9. Take out drive pinion together with rear bearing inner cone,
drive pinion bearing spacer and pinion bearing adjusting
washer.
10. Remove front oil seal and pinion front bearing inner cone.
PD349
11. Remove pinion bearing outer races with a brass drift.
SPD209
12. Remove pinion rear bearing inner cone and drive pinion height
adjusting washer.
Tool number: ST30031000 (J22912-01)
SPD207A
DIFFERENTIAL CASENBPD0018S031. Remove side bearing inner cones.
To prevent damage to bearing, engage puller jaws in grooves.
Tool number:
A ST33051001 (J22888-20)
B ST33061000 (J8107-2)
SPD022
Be careful not to confuse the right and left hand parts.
Keep bearing and bearing race for each side together.
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
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ST
RS
BT
HA
SC
EL
IDX
FRONT FINAL DRIVER200A
Disassembly (Cont'd)
PD-21

SPD024
2. Loosen ring gear bolts in a criss-cross pattern.
3. Tap ring gear off the differential case with a soft hammer.
Tap evenly all around to keep ring gear from binding.
SPD025
4. Punch off pinion mate shaft lock pin from ring gear side.
SPD236A
DIFFERENTIAL SIDE SHAFTNBPD0018S041. Cut collar with cold chisel. Be careful not to damage differen-
tial side shaft.
SPD672
2. Reinstall differential side shaft into extension tube and secure
with bolts. Remove rear axle bearing by drawing out differen-
tial side shaft from rear axle bearing with puller.
FRONT FINAL DRIVER200A
Disassembly (Cont'd)
PD-22

SPD647
SPD781
3. Remove grease seal and oil seal.
InspectionNBPD0019RING GEAR AND DRIVE PINIONNBPD0019S01Check 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).
SPD097AA
DIFFERENTIAL CASE ASSEMBLYNBPD0019S02Check mating surfaces of differential case, side gears, pinion mate
gears, pinion mate shaft and thrust washers.
SPD715
BEARINGNBPD0019S031. Thoroughly clean bearing.
2. Check bearing for wear, scratches, pitting or flaking.
Check tapered roller bearing for smooth rotation. If damaged,
replace outer race and inner cone as a set.
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
FRONT FINAL DRIVER200A
Disassembly (Cont'd)
PD-23

AdjustmentNBPD0020For quiet and reliable final drive operation, the following five adjust-
ments must be made correctly:
1. Side bearing preload
2. Pinion gear height
3. Pinion bearing preload
4. Ring gear-to-pinion backlash. Refer to SDS, PD-37.
5. Ring and pinion gear tooth contact pattern
SPD527
SIDE BEARING PRELOADNBPD0020S01A selection of carrier side bearing adjusting washer is
required for successful completion of this procedure.
1. Make sure all parts are clean and that the bearings are well
lubricated with light oil or ªDEXRON
TMº type automatic trans-
mission fluid.
2. Place the differential carrier, with side bearings and bearing
races installed, into the final drive housing.
SPD894
3. Put the side bearing spacer in place.
CAUTION:
Side bearing spacer is placed on either the right or left
depending upon final drive gear ratio. Be sure to replace it on
the correct side.
SPD986
4. Using Tool, install original carrier side bearing preload shims
on the carrier end, opposite the ring gear.
Tool number: KV38100600 (J25267)
SPD526
5. Install the side bearing caps in their correct locations and
torque the bearing cap retaining bolts.
Specification:
88 - 98 N´m (9 - 10 kg-m, 65 - 72 ft-lb)
6. Turn the carrier several times to seat the bearings.
FRONT FINAL DRIVER200A
Adjustment
PD-24

SPD677
3. Hold companion flange steady by hand and rotate the ring gear
in both directions.
SPD007-B
SPD782-A
SPD654-A
AssemblyNBPD0021DIFFERENTIAL SIDE SHAFTNBPD0021S011. Install oil seal and grease seal.
FRONT FINAL DRIVER200A
Adjustment (Cont'd)
PD-30

SPD655
2. Install extension tube retainer, rear axle bearing and rear axle
shaft bearing collar on differential side shaft.
SPD552
DIFFERENTIAL CASENBPD0021S021. Install side gears, pinion mate gears and thrust washers into
differential case.
SPD258
2. Fit pinion mate shaft to differential case so that it meets lock
pin holes.
3. Adjust backlash between side gear and pinion mate gear by
selecting side gear thrust washer.
Refer to SDS, PD-36.
Backlash between side gear and pinion mate gear
(Clearance between side gear thrust washer and differ-
ential case):
Less than 0.15 mm (0.0059 in)
SPD030
4. Install pinion mate shaft lock pin with a punch.
Make sure lock pin is flush with case.
SPD322
5. Apply gear oil to gear tooth surfaces and thrust surfaces and
check to see they turn properly.
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
FRONT FINAL DRIVER200A
Assembly (Cont'd)
PD-31

SPD554
6. Install differential case assembly on ring gear.
7. Apply locking agent [Locktite (stud lock) or equivalent] to ring
gear bolts, and install them.
Tighten bolts in a criss-cross pattern, lightly tapping bolt head
with a hammer.
PD353
8. Press-fit side bearing inner cones on differential case with Tool.
Tool number:
A KV38100300 (J25523)
B ST33061000 (J8107-2)
SPD679
FINAL DRIVE HOUSINGNBPD0021S031. Press-fit front and rear bearing outer races with Tools.
Tool number:
A ST30611000 (J25742-1)
B ST30621000 (J25742-5)
C ST30613000 (J25742-3)
SPD377
2. Select drive pinion height adjusting washer and pinion bearing
adjusting washer. Refer to ªPINION GEAR HEIGHT AND PIN-
ION BEARING PRELOADº, PD-25.
3. Install drive pinion height adjusting washer in drive pinion, and
press-fit pinion rear bearing inner cone in it, using press and
Tool.
Tool number:
ST30901000 (J26010-01)
FRONT FINAL DRIVER200A
Assembly (Cont'd)
PD-32

SPD664
9. Turn drive pinion in both directions several revolutions, and
measure pinion bearing preload.
Tool number: ST3127S000 (J25765-A)
Pinion bearing preload:
1.1 - 1.4 N´m (11 - 14 kg-cm, 9.5 - 12.2 in-lb)
When pinion bearing preload is outside the specifications,
replace pinion bearing adjusting washer and spacer with a
different thickness.
SPD527
10. Select side bearing adjusting washer.
Refer to ªSIDE BEARING PRELOADº, PD-24.
11. Install differential case assembly with side bearing outer races
into final drive housing.
SPD558
12. Insert left and right side bearing adjusting washers in place
between side bearings and final drive housing.
SPD559
13. Drive in side bearing spacer with Tool.
Tool number: KV38100600 (J25267)
SPD526
14. Align mark on bearing cap with that on final drive housing and
install bearing cap on final drive housing.
FRONT FINAL DRIVER200A
Assembly (Cont'd)
PD-34