Infiniti QX56 (Z62). Manual - part 502

DLN-208

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

DIFFERENTIAL ASSEMBLY

b.

Using feeler gauge, measure the clearance between side gear
back and differential case at 3 different points, while rotating
side gear. Average the 3 readings, and then measure the clear-
ance of the other side as well.

CAUTION:

To prevent side gear from tilting, insert feeler gauges with
the same thickness from both sides.

c.

If the back clearance is outside the specification, use a thicker/
thinner side gear thrust washer to adjust. For selecting thrust
washer, refer to the latest parts information.

CAUTION:

Select a side gear thrust washer for right and left individu-
ally.

6.

Drive a lock pin into pinion mate shaft, using a punch.
Make sure lock pin is flush with differential case.

CAUTION:

Never reuse lock pin.

7.

Apply thread locking sealant into the thread hole of drive gear.
• Use Genuine High Strength Thread Locking Sealant or equiv-

alent. Refer to 

GI-22, "Recommended Chemical Products and

Sealants"

.

CAUTION:

Clean and degrease drive gear back and threaded holes
sufficiently.

8.

Install drive gear to differential case.

CAUTION:

Align the matching marks of differential case and drive
gear.

9.

Tighten the mounting bolts with the following procedure.

CAUTION:

Apply anti-corrosin oil to the thread and seat of mounting
bolts.

a.

Tighten the bolts in a crisscross fashion to the specified torque.

b.

Tighten the bolts additionally to the specified angle.

Standard

Side gear back clearance

: Refer to 

DLN-222, "Side 

Gear Clearance"

.

When the back clearance 
is large:

Use a thicker thrust wash-
er.

When the back clearance 
is small:

Use a thinner thrust wash-
er.

PDIA0576E

SPD030

SDIA2594E

Drive gear mounting 
bolts tightening torque

: 78.5 N•m (8.0 kg-m, 58 ft-lb)

SDIA0247J

DIFFERENTIAL ASSEMBLY

DLN-209

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

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CAUTION:

Check the tightening angle using the angle wrench [SST: KV10112100 (BT-8653-A)]. Never make
judgment by visual inspection.

10. Press side bearing inner races to differential case, using the drift

(A) and the base (B).

CAUTION:

Never reuse side bearing inner race.

11. Install differential case assembly with side bearing outer races

into gear carrier.

12. Measure side bearing preload. If necessary, select the appropri-

ate side bearing adjusting washers. Refer to 

DLN-210, "Adjust-

ment"

.

13. Insert selected left and right side bearing adjusting washers in

place between side bearings and gear carrier. Refer to 

DLN-

210, "Adjustment"

.

14. Align matching marks on bearing cap with that on gear carrier.

15. Install bearing caps and tighten bearing cap mounting bolts.

Drive gear mounting 
bolts tightening angle

: 31 to 36 degree

A

: Drift [SST: ST01550002 (

—

)]

B

: Drift [SST: KV40104730 (

—

)]

SPD353

SPD527

SPD558

SDIA1795E

DLN-210

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

DIFFERENTIAL ASSEMBLY

16. Using the drift [SST: ST35271000 (J-26091)], drive side oil seals

until it becomes flush with the case end.

CAUTION:

• Never reuse oil seal.
• When installing, never incline oil seal.
• Apply multi-purpose grease onto oil seal lips, and gear oil

onto the circumference of oil seal.

17. Check and adjust drive gear runout, tooth contact, drive gear to

drive pinion backlash, and total preload torque. Refer to 

DLN-

210, "Adjustment"

.

Recheck above items. Readjust the above description, if neces-
sary.

18. Apply sealant to mating surface of rear cover.

• Use Genuine Silicone RTV or equivalent. Refer to 

GI-22,

"Recommended Chemical Products and Sealants"

.

CAUTION:

Remove old sealant adhering to mounting surfaces. Also
remove any moisture, oil, or foreign material adhering to
application and mounting surfaces.

19. Install rear cover on gear carrier and tighten mounting bolts.

20. Install side flange with the following procedure.
a.

Attach the protector [SST: KV38108000 (

—

)] to side oil

seal.

b.

After the side flange is inserted and the serrated part of side
gear has engaged the serrated part of flange, remove the pro-
tector.

c.

Insert the side flange until the serrated part of the side flange
has engaged the serrated part of the side gear and remove the
protector.
NOTE:
When installation is completed, driving sound of the side flange
turns into a sound that seems to affect the whole final drive.

d.

Confirm that the dimension of the side flanges (1) installation
measurement (A) in the figure comes into the following.

Adjustment

INFOID:0000000006222423

TOTAL PRELOAD TORQUE

Before inspection and adjustment, drain gear oil.

1.

Secure final drive assembly onto an attachment [SST: KV38100800 (

—

)].

2.

Remove side flanges.

3.

Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.

SPD560

PDIA0961E

SDIA0822E

A

: 342.2 mm (13.47 in)

JSDIA0185ZZ

DIFFERENTIAL ASSEMBLY

DLN-211

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

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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 

DLN-204, "Disassembly"

.

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.

Total preload torque

: Refer to 

DLN-222, "Pre-

load Torque"

.

JSDIA0042ZZ

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. For selecting adjusting washer, refer to the latest parts in-
formation.

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. For selecting adjusting washer, refer to the latest parts in-
formation.

SPD527

SPD558