Infiniti G37 Coupe. Manual — part 433
DLN-46
< DISASSEMBLY AND ASSEMBLY >
[REAR FINAL DRIVE: R200]
DIFFERENTIAL ASSEMBLY
3.
Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
4.
Rotate drive pinion at least 20 times to check for smooth opera-
tion of the bearing.
5.
Measure total preload with the preload gauge (A) [SST:
ST3127S000 (J-25765-A)].
NOTE:
Total preload torque = Pinion bearing preload torque + Side
bearing preload torque
• If measured value is out of the specification, disassemble it to check and adjust each part. Adjust the
pinion bearing preload and side bearing preload.
Adjust the pinion bearing preload first, then adjust the side bearing preload.
SIDE BEARING PRELOAD
• Before inspection and adjustment, drain gear oil.
1.
Remove rear cover. Refer to
2.
Make sure all parts are clean. Also, make sure the bearings are
well lubricated with gear oil.
3.
Place the differential case, with side bearings and bearing races
installed, into gear carrier.
4.
Insert left and right original side bearing adjusting washers in
place between side bearings and gear carrier.
Standard
Total preload torque
: Refer to
.
JSDIA0031ZZ
When the preload torque is large
On pinion bearings:
Replace the collapsible spacer.
On side bearings:
Use thinner side bearing adjusting washers by the same amount to
each side.
When the preload is small
On pinion bearings:
Tighten the drive pinion lock nut.
On side bearings:
Use thicker side bearing adjusting washers by the same amount to
each side.
SPD527
SPD558
DIFFERENTIAL ASSEMBLY
DLN-47
< DISASSEMBLY AND ASSEMBLY >
[REAR FINAL DRIVE: R200]
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5.
Install bearing caps in their correct locations and tighten bearing
cap mounting bolts.
6.
Turn the carrier several times to seat the bearings.
7.
Measure the turning torque of the carrier at the drive gear
mounting bolts with a spring gauge [SST:
—
(J-8129)].
8.
If the turning torque is outside the specification, use a thicker/
thinner side bearing adjusting washer to adjust.
CAUTION:
Select a side bearing adjusting washer for right and left
individually.
9.
Record the total amount of washer thickness required for the correct carrier side bearing preload.
DRIVE GEAR RUNOUT
1.
Remove rear cover. Refer to
.
2.
Fit a dial indicator to the drive gear back face.
3.
Rotate the drive gear to measure runout.
• If the runout is outside of the repair limit, check drive gear
assembly condition; foreign material may be caught between
drive gear and differential case, or differential case or drive
gear may be deformed, etc.
CAUTION:
Replace drive gear and drive pinion gear as a set.
TOOTH CONTACT
• Before inspection and adjustment, drain gear oil.
1.
Remove rear cover. Refer to
.
SDIA1795E
Specification
: 34.2 – 39.2 N (3.5 – 4.0 kg,
7.7 – 8.8 lb) of pulling force
at the drive gear bolt
SPD194A
If the turning torque is less
than the specified range:
Use a thicker thrust wash-
er.
If the turning torque is
greater than the specifica-
tion:
Use a thinner thrust wash-
er.
SPD772
Limit
Drive gear runout
: Refer to
SPD886
DLN-48
< DISASSEMBLY AND ASSEMBLY >
[REAR FINAL DRIVE: R200]
DIFFERENTIAL ASSEMBLY
2.
Apply red lead to drive gear.
CAUTION:
Apply red lead to both the faces of 3 to 4 gears at 4 loca-
tions evenly spaced on drive gear.
3.
Rotate drive gear back and forth several times, check drive pin-
ion gear to drive gear tooth contact.
CAUTION:
Check tooth contact on drive side and reverse side.
SPD357
SDIA0570E
SDIA0207E
DIFFERENTIAL ASSEMBLY
DLN-49
< DISASSEMBLY AND ASSEMBLY >
[REAR FINAL DRIVE: R200]
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4.
If tooth contact is improperly adjusted, follow the procedure
below to adjust the pinion height (dimension X).
• If the tooth contact is near the face (face contact), or near the
heel (heel contact), thicken pinion height adjusting washers to
move drive pinion closer to drive gear.
• If the tooth contact is near the flank (flank contact), or near the
toe (toe contact), thin pinion height adjusting washers to move
drive pinion farther from drive gear.
BACKLASH
• Before inspection and adjustment, drain gear oil.
1.
Remove rear cover. Refer to
.
2.
Fit a dial indicator to the drive gear face to measure the back-
lash.
• If the backlash is outside of the specified value, change the
thickness of side bearing adjusting washer.
SDIA0517E
PDIA0440E
PDIA0441E
Standard
Backlash
: Refer to
.
When the backlash is large:
Make drive gear back side adjusting washer thicker,
and drive gear tooth side adjusting washer thinner by
the same amount.
When the backlash is small:
Make drive gear back side adjusting washer thinner,
and drive gear tooth side adjusting washer thicker by
the same amount.
SPD513
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