Infiniti QX56 (Z62). Manual - part 492

DLN-168

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: R180A]

DIFFERENTIAL ASSEMBLY

Disassembly

INFOID:0000000006222392

1.

Remove bushing with drift (commercial service tool).

2.

Remove differential side shaft assembly. Refer to 

DLN-165, "Disassembly"

.

3.

Remove side oil seal (left side) from gear carrier with a suitable tool.

4.

For proper reinstallation, paint matching marks on one side of
the side bearing cap and gear carrier.

CAUTION:

• For matching marks, use paint. Never damage side bear-

ing cap and gear carrier.

• Bearing caps are manufactured as integral molding. Use

the matching marks to them in their original positions.

5.

Remove the side bearing caps.

6.

Lift the differential case assembly out of the gear carrier with
sliding hammer (commercial service tool).

7.

Remove the differential case assembly with the side bearing
outer race and side bearing adjusting washer.

CAUTION:

• Keep side bearing outer races together with side bearing

inner races. Do not mix them up.

• Keep side bearing adjusting washers together with side

bearings.

: Apply Genuine Silicone RTV or equivalent. Refer to 

GI-22, "Recommended Chemical Products and Sealants"

.

: Apply Genuine High Strength Thread Locking Sealant or equivalent. Refer to 

GI-22, "Recommended Chemical Products 

and Sealants"

.

Refer to 

GI-4, "Components"

 for symbols not described above.

SDIA1795E

PDIA0701E

PDIA0547E

SPD919

DIFFERENTIAL ASSEMBLY

DLN-169

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: R180A]

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8.

Remove housing spacer.

9.

Remove side bearing inner race with the puller (A) and base (B).

CAUTION:

• To prevent damage to the side bearing and drive gear,

place copper plates between these parts and vise.

• It is necessary to remove side bearing inner race except

when it is replaced.

10. For proper reinstallation, paint matching marks on the differential

case and drive gear.

CAUTION:

For matching marks, use paint. Never damage differential
case and drive gear.

11. Remove the drive mounting gear bolts.
12. Tap the drive gear off the differential case using suitable tool.

CAUTION:

Tap evenly all around to keep drive gear from bending.

13. Perform inspection after disassembly. Refer to 

DLN-174,

"Inspection"

. 

Assembly

INFOID:0000000006222393

1.

Apply thread locking sealant into the threaded holes of the drive
gear and install the new drive gear bolts.
• Use Genuine High Strength Thread Locking Sealant or equiv-

alent. Refer to 

GI-22, "Recommended Chemical Products and

Sealants"

.

CAUTION:

Clean degrees drive gear back and threaded holes suffi-
ciently.

2.

Install the drive gear to differential case assembly.

CAUTION:

Align the matching marks of differential case assembly and
drive gear

3.

Tighten the drive gear mounting bolts with the following procedure.

CAUTION:

Apply anti-corrosion 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 at the specified angle.

CAUTION:

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

A: Puller [SST: ST33051001 (J-22888-20)]

B: Base [SST: ST33061000 (J-8107-2)]

PDIA0827E

PDIA0496E

SDIA2594E

Drive gear mounting 
bolts tightening torque

: 58.8 N•m (6.0 kg-m, 43 ft-lb)

Drive gear mounting 
bolts tightening angle

: 34 to 39 degree

AWBIA0722ZZ

DLN-170

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: R180A]

DIFFERENTIAL ASSEMBLY

4.

Press side bearing inner races to the differential case with the
drift (A) and the base (B).

CAUTION:

Never reuse side bearing inner races.

5.

Install housing spacer.

6.

Install the differential case assembly with the side bearing outer
races into the gear carrier.

CAUTION:

• Never reuse side bearing outer race when replacing side

bearing inner race (replace as a set).

• Apply differential gear oil to the side bearings.

7.

Insert left and right original side bearing adjusting washers in
place between side bearings and gear carrier.

8.

Install the side bearing caps with the matching marks aligned
and tighten the side bearing cap bolts to the specified torque.

CAUTION:

Align matching marks on bearing cap with that on gear car-
rier.

9.

Install side oil seal (left side) until it becomes flush with the gear
carrier with the drift (A and B).

CAUTION:

• Never reuse side 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.

A: Drift [SST: ST33230000 (J-35867)]

B: Base [SST: ST33061000 (J-8107-2)]

SPD353

SPD919

SPD924

SDIA1795E

A: Drift [SST: ST30720000 (J-25405)]

B: Drift [SST: ST27863000 (

—

)]

PDIA0711E

DIFFERENTIAL ASSEMBLY

DLN-171

< UNIT DISASSEMBLY AND ASSEMBLY >

[FRONT FINAL DRIVE: R180A]

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10. Check and adjust drive gear runout, tooth contact, backlash, and total preload torque. Refer to 

DLN-171,

"Adjustment"

.

Recheck above items. Readjust the above description, if necessary.

11. Apply sealant to match surface of carrier cover.

• Use Genuine Silicone RTV or equivalent. Refer to 

GI-22,

"Recommended Chemical Products and Sealants"

.

CAUTION:

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

12. Install the carrier cover to the gear carrier. Tighten the bolts to

the specified torque.

13. Install side shaft. Refer to 

DLN-166, "Assembly"

.

14. Install bushing with drift (commercial service tool).

Adjustment

INFOID:0000000006222394

TOTAL PRELOAD TORQUE

1.

Install the differential side shaft. Refer to 

DLN-166, "Assembly"

.

2.

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

3.

Rotate the drive pinion at least 20 times to check for smooth
operation of the bearings.

4.

Measure total preload torque with the preload gauge [SST:
ST3127S000 (J-25765-A)].

NOTE:
Total preload torque = Drive pinion bearing preload torque +
Side bearing preload torque

• If the measured value is out of the specification, check and adjust each part. Adjust the drive pinion

bearing preload torque first, then adjust the side bearing preload torque.

DRIVE GEAR RUNOUT

1.

Remove carrier cover. Refer to 

DLN-168, "Disassembly"

.

PDIA0712E

Total preload torque

: Refer to 

DLN-185, "Pre-

load Torque"

.

PDIA0697E

When the preload torque is large

On drive pinion bearings:

Decrease the drive pinion bearing adjusting washer and drive 
pinion adjusting washer thickness. For selecting adjusting 
washer, refer to the latest parts information.

On side bearings:

Increase the side bearing adjusting washer thickness. For se-
lecting adjusting washer, refer to the latest parts information.

When the preload torque is small

On drive pinion bearings:

Increase the drive pinion bearing adjusting washer and drive 
pinion adjusting washer thickness. For selecting adjusting 
washer, refer to the latest parts information.

On side bearings:

Decrease the side bearing adjusting washer thickness. For se-
lecting adjusting washer, refer to the latest parts information.