INFINITI QX4 2001 Factory Service Manual

SPD893
3. Place the pinion preload shim selector Tool, J34309-1, gauge
screw assembly with the pinion rear bearing inner cone
installed into the final drive housing.
SPD199A
4. Assemble the front pinion bearing inner cone and the J34309-2
gauge anvil together with the J34309-1 gauge screw in the
final drive housing. Make sure that the pinion height gauge
plate, J34309-16, will turn a full 360 degrees, and tighten the
two sections together by hand.
SPD770
5. Turn the assembly several times to seat the bearings.
SPD234A
6. Measure the turning torque at the end of the J34309-2 gauge
anvil using torque wrench J25765A.
Turning torque specification:
1.0 - 1.3 N´m (10 - 13 kg-cm, 8.7 - 11.3 in-lb)
SPD208A
7. Place the J34309-1 ªR200Aº pinion height adapter onto the
gauge plate and tighten it by hand.
CAUTION:
Make sure all machined surfaces are clean.
FRONT FINAL DRIVER200A
Adjustment (Cont'd)
PD-26

SPD209A
PINION BEARING PRELOAD WASHER SELECTION
8. Place the solid pinion bearing spacer, small end first, over the
J34309-2 gauge anvil and seat the small end squarely against
the tip of the J34309-1 gauge screw in the tool recessed por-
tion.
SPD773
SPD210A
SPD774
9. Select the correct thickness of pinion bearing preload adjust-
ing washer using a standard gauge of 3.5 mm (0.138 in) and
your J34309-101 feeler gauge. The exact measure you get
with your gauges is the thickness of the adjusting washer
required. Select the correct washer.
Drive pinion bearing preload adjusting washer:
Refer to SDS, PD-37.
10. Set your selected, correct pinion bearing preload adjusting
washer aside for use when assembling the pinion gear and
bearings into the final drive.
SPD211A
PINION HEIGHT ADJUSTING WASHER SELECTION
11. Now, position the side bearing discs, J25269-4, and arbor
firmly into the side bearing bores.
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FRONT FINAL DRIVER200A
Adjustment (Cont'd)
PD-27

SPD212A
12. Install the side bearing caps and tighten the cap bolts.
Specification:
88 - 98 N´m (9 - 10 kg-m, 65 - 72 ft-lb)
SPD204A
13. Select the correct standard pinion height adjusting washer
thickness by using a standard gauge of 3.0 mm (0.118 in) and
your J34309-101 feeler gauge. Measure the gap between the
J34309-11 ªR200Aº pinion height adapter and the arbor.
SPD775
14. Write down your exact total measurement.
SPD542
15. Correct the pinion height washer size by referring to the ªpin-
ion head numberº.
There are two numbers painted on the pinion gear. The first
one refers to the pinion and ring gear as a matched set and
should be the same as the number on the ring gear. The sec-
ond number is the ªpinion head height numberº, and it refers
to the ideal pinion height from standard for quietest operation.
Use the following chart to determine the correct pinion height
washer. Refer to SDS, PD-37.
FRONT FINAL DRIVER200A
Adjustment (Cont'd)
PD-28

Pinion Head Height NumberAdd or Remove from the Standard
Pinion Height Washer Thickness
Measurement
þ6 Add 0.06 mm (0.0024 in)
þ5 Add 0.05 mm (0.0020 in)
þ4 Add 0.04 mm (0.0016 in)
þ3 Add 0.03 mm (0.0012 in)
þ2 Add 0.02 mm (0.0008 in)
þ1 Add 0.01 mm (0.0004 in)
0 Use the selected washer thickness
+1 Subtract 0.01 mm (0.0004 in)
+2 Subtract 0.02 mm (0.0008 in)
+3 Subtract 0.03 mm (0.0012 in)
+4 Subtract 0.04 mm (0.0016 in)
+5 Subtract 0.05 mm (0.0020 in)
+6 Subtract 0.06 mm (0.0024 in)
SPD205A
16. Remove the J34309 pinion preload shim selector tool from the
final drive housing and disassemble to retrieve the pinion bear-
ings.
TOOTH CONTACTNBPD0020S03Gear tooth contact pattern check is necessary to verify correct
relationship between ring gear and drive pinion.
Hypoid gear sets which are not positioned properly in relation to
one another may be noisy, or have short life, or both. With a pat-
tern check, the most desirable contact for low noise level and long
life can be assured.
SPD357
1. Thoroughly clean ring gear and drive pinion teeth.
2. Sparingly apply a mixture of powdered ferric oxide and oil or
equivalent to 3 or 4 teeth of ring gear drive side.
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FRONT FINAL DRIVER200A
Adjustment (Cont'd)
PD-29

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.
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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

SPD581
4. Place pinion front bearing inner cone in final drive housing.
SPD680
5. Apply multi-purpose grease to cavity at sealing lips of oil seal.
Install front oil seal.
Tool number:
KV38100500 (J25273)
SPD658
6. Place drive pinion bearing spacer, drive pinion bearing adjust-
ing washer and drive pinion in final drive housing.
SPD681
7. Insert companion flange into drive pinion by tapping the com-
panion flange with a soft hammer.
SPD478A
8. Tighten pinion nut to the specified torque.
The threaded portion of drive pinion and pinion nut should be
free from oil or grease.
Tool number: KV38108300 (J44195)
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FRONT FINAL DRIVER200A
Assembly (Cont'd)
PD-33

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

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