Infiniti QX56 (Z62). Manual - part 503

 

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Infiniti QX56 (Z62). Manual - part 503

 

 

DLN-212

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

DIFFERENTIAL ASSEMBLY

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. For selecting
adjusting washer, refer to the latest parts information.

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 

DLN-204, "Disassembly"

.

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 

DLN-204, "Disassembly"

.

SDIA1795E

Specification

: 34.2 – 39.2N (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

Drive gear runout

: Refer to 

DLN-222, "Drive 

Gear Runout"

.

SPD886

DIFFERENTIAL ASSEMBLY

DLN-213

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

C

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J

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DLN

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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

JPDID0398GB

DLN-214

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

DIFFERENTIAL ASSEMBLY

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.
For selecting adjusting washer, refer to the latest parts infor-
mation.

• 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.
For selecting adjusting washer, refer to the latest parts infor-
mation.

BACKLASH

Before inspection and adjustment, drain gear oil.

1.

Remove rear cover. Refer to 

DLN-204, "Disassembly"

.

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

Backlash

: Refer to 

DLN-222, "Back-

lash"

.

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. For selecting adjusting washer, re-
fer to the latest parts information.

SPD513

DIFFERENTIAL ASSEMBLY

DLN-215

< UNIT DISASSEMBLY AND ASSEMBLY >

[REAR FINAL DRIVE: R230]

C

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DLN

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CAUTION:

Never change the total amount of washers as it changes the bearing preload.

Inspection

INFOID:0000000006222424

INSPECTION AFTER DISASSEMBLY

Drive Gear and Drive Pinion

• Clean up the disassembled parts.
• If the gear teeth never mesh or line-up correctly, determine the cause and adjust or replace as necessary.
• If the gears are worn, cracked, damaged, pitted or chipped (by friction) noticeably, replace with new drive

gear and drive pinion as a set.

Bearing

• Clean up the disassembled parts.
• If any chipped (by friction), pitted, worn, rusted or scratched marks, or unusual noise from the bearing is

observed, replace as a bearing assembly (as a new set).

Side Gear and Pinion Mate Gear

• Clean up the disassembled parts.
• If any cracks or damage on the surface of the tooth is found, replace.
• If any worn or chipped mark on the contact sides of the thrust washer is found, replace.

Side Gear Thrust Washer and Pinion Mate Thrust Washer

• Clean up the disassembled parts.
• If it is chipped (by friction), damaged, or unusually worn, replace.

Oil Seal

• Whenever disassembled, replace.
• If wear, deterioration of adherence (sealing force lips), or damage is detected on the lips, replace them.

Differential case

• Clean up the disassembled parts.
• If any wear or crack on the contact sides of the differential case is found, replace.

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. For selecting adjusting washer, re-
fer to the latest parts information.

 

 

 

 

 

 

 

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