1998 NISSAN PICK-UP Repair Manual

5. Attach Tool (Height gauge) to gear carrier, and measure the
clearance ``N'' between the height gauge and the dummy
shaft face.
Tool number: KV38100120
6. Substitute these values into the equation to calculate the
thickness of the washer.
If value signifying H is not given, regard it as zero and cal-
culate.
T (Thickness of washer)=Nþ(Hx0.01) + 3.00
Example:
N = 0.23
H=1
T=Nþ(Hx0.01) + 3.00 = 0.23 þ (1 x 0.01) + 3.00
(1) H ................................................................. 1
x 0.01
+0.01
(2) N ............................................................ 0.23
þ (+0.01)
0.22
(3) 0.22
+3.00
3.22
\T = 3.22
7. Select the proper washer. (Refer to SDS.)
If you cannot find the desired thickness of washer, use
washer with thickness closest to the calculated value.
Example:
Calculated value ... T = 3.22 mm
Used washer ... T = 3.21 mm
SPD757
ADJUSTMENTC200
Drive Pinion Height (Cont'd)
PD-48

Tooth Contact
Checking gear tooth contact pattern is necessary to verify cor-
rect relationship between ring gear and drive pinion.
Hypoid gear set which is not positioned properly may be noisy,
or have short life or both. With the checking or gear tooth con-
tact pattern, the most desirable contact for low noise level and
long life can be assured.
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.
3. Hold companion flange steady and rotate the ring gear in
both directions.
SPD199
SPD200
SPD007
ADJUSTMENTC200
PD-49

Differential Case
1. Measure clearance between side gear thrust washer and
differential case.
Clearance between side gear thrust washer
and differential case (A þ B):
Less than 0.15 mm (0.0059 in)
The clearance can be adjusted with side gear thrust washer.
Refer to SDS, PD-79.
2. Apply gear oil to gear tooth surfaces and thrust surfaces and
check to see they turn properly.
3. Install differential case LH and RH.
4. Place differential case on ring gear.
5. Apply locking agent [Locktite (stud lock) or equivalent] to ring
gear bolts, and install them.
Tighten bolts in a criss-cross fashion, lightly tapping bolt
head with a hammer.
6. Press-fit side bearing inner cones on differential case with
Tool.
Tool numbers:
VAST33230000
VBST33081000
SPD656
SPD643
SPD746
PD353
ASSEMBLYC200
PD-50

Differential Carrier
1. Press-fit front and rear bearing outer races with Tools.
Tool numbers:
VAST30611000
VBST30621000
VCST30613000
2. Select pinion height adjusting washer. Refer to
``ADJUSTMENT'', PD-47.
3. Install pinion height adjusting washer in drive pinion, and
press-fit rear bearing inner cone in it, with press and Tool.
Tool number: ST30901000
4. Place pinion front bearing inner cone in gear carrier.
5. Apply multi-purpose grease to cavity at sealing lips of oil
seal. Install front oil seal.
Tool number: KV38100500
SPD679
SPD377
SPD581
SPD557
ASSEMBLYC200
PD-51

6. Place drive pinion bearing spacer, drive pinion bearing
adjusting washer and drive pinion in gear carrier.
7. Insert sensor rotor into companion flange with Tool.
Tool number: ST30720000
8. Install ABS sensor unit on gear carrier.
9. Insert companion flange into drive pinion by tapping the com-
panion flange with a soft hammer.
10. Tighten pinion nut to 127 N´m (13 kg-m, 94 ft-lb).
The threaded portion of drive pinion and pinion nut should
be free from oil or grease.
Tool number: ST38060002
SPD222
SPD431A
SPD708
SPD204.SPD204
ASSEMBLYC200
Differential Carrier (Cont'd)
PD-52

11. Tighten the pinion nut by very small degrees until the speci-
fied preload is achieved. When checking the preload, turn the
drive pinion in both directions several times to set the bear-
ing rollers.
Tool number: ST3127S000
Pinion bearing preload (With front oil seal):
1.1 - 1.7 N´m
(11 - 17 kg-cm, 9.5 - 14.8 in-lb)
Pinion bearing preload (Without front oil seal):
1.0 - 1.6 N´m
(10 - 16 kg-cm, 8.7 - 13.9 in-lb)
This procedure will have to be repeated if:
lMaximum preload is achieved before the minimum pin-
ion nut torque is reached.
lMinimum preload is not achieved before maximum pin-
ion nut torque is reached.
12. Select side bearing adjusting washer.
Refer to Adjustment.
13. Install differential case assembly with side bearing outer
races into gear carrier.
14. Insert left and right side bearing adjusting washers in place
between side bearing and carrier.
15. Drive in side bearing spacer with Tool.
Tool number: KV38100600
16. Align mark on bearing cap with that on gear carrier and install
bearing cap on gear carrier.
SPD241
SPD203
SPD558
SPD709
SPD226
ASSEMBLYC200
Differential Carrier (Cont'd)
PD-53

17. Measure ring gear-to-drive pinion backlash with a dial indi-
cator.
Ring gear-to-drive pinion backlash:
0.13 - 0.18 mm
(0.0051 - 0.0071 in)
lIf 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.
18. Check total preload with Tool.
When checking preload, turn drive pinion in both directions
several times to seat bearing rollers correctly.
Total preload:
1.2 - 2.3 N´m
(12 - 23 kg-cm, 10 - 20 in-lb)
Tool number: ST3127S000
lIf preload is too great, remove the same amount of shim from
each side.
lIf 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.
19. Recheck ring gear-to-drive pinion backlash because
increase or decrease in thickness of shims will cause change
of ring gear-to-pinion backlash.
20. Check runout of ring gear with a dial indicator.
Runout limit:
0.05 mm (0.0020 in)
lIf backlash varies excessively in different places, the vari-
ance may have resulted from foreign matter caught between
the ring gear and the differential case.
lIf 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.
21. Check tooth contact.
Refer to ``ADJUSTMENT'', PD-49.
22. Install rear cover and gasket.
SPD196
SPD241
SPD561
SPD702
ASSEMBLYC200
Differential Carrier (Cont'd)
PD-54

SPD427A
REAR FINAL DRIVEH233B
PD-55