Infiniti QX56 (Z62). Manual - part 498

DLN-192

< SYMPTOM DIAGNOSIS >

[REAR FINAL DRIVE: R230]

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

SYMPTOM DIAGNOSIS

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

NVH Troubleshooting Chart

INFOID:0000000006222410

Use the chart below to find the cause of the symptom. If necessary, repair or replace these parts.

×

: Applicable

Reference page

DLN-215, "

In

sp

ecti

on

"

DLN-210, "

Adjustment

"

DLN-215, "

In

sp

ecti

on

"

DLN-210, "

Adjustment

"

DLN-210, "

Adjustment

"

DLN-193, "

In

sp

ecti

on

"

NVH o

f FRONT PROPE

LLE

R SHAFT 

in 

thi

s

 se

cti

o

n

.

NVH of REAR PROPELLE

R SHAFT 

in 

thi

s

 secti

o

n.

NVH in F

AX, RAX

, and 

RSU sections.

NVH in WT section.

NVH in WT section.

NVH in RAX 

section.

NVH in BR section.

NVH in ST 

section.

Possible cause and SUSPECTED PARTS

Ge

a

r t

o

ot

h 

ro

ug

h

Gear co

nt

ac

t 

im

pro

p

e

r

T

o

oth

 s

u

rf

ac

es

 worn

Ba

ck

la

sh

 i

n

co

rrect

Co

mp

an

io

n

 f

lan

ge

 ex

ces

si

ve

 run

o

u

t

Gear oi

l 

im

p

rope

r

PROPELLER SHAF

T

AXLE

 AND SUSPE

N

S

ION

TIRES

ROA

D

 WHEEL

DRIVE SHA

F

T

BRAKES

STEERI

N

G

Symptom

Noise

×

×

×

×

×

×

×

×

×

×

×

×

×

REAR DIFFERENTIAL GEAR OIL

DLN-193

< PERIODIC MAINTENANCE >

[REAR FINAL DRIVE: R230]

C

E

F

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B

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PERIODIC MAINTENANCE

REAR DIFFERENTIAL GEAR OIL

Inspection

INFOID:0000000006222411

OIL LEAKAGE

Check that differential gear oil is not leaking from the rear final drive assembly or around it.

OIL LEVEL

• Remove filler plug (1) and check oil level from filler plug mounting

hole as shown in the figure.

CAUTION:

Never start engine while checking oil level.

• Set a gasket on filler plug (1) and install it on final drive assembly.

Refer to 

DLN-203, "Exploded View"

.

CAUTION:

Never reuse gasket.

Draining

INFOID:0000000006222412

1.

Stop the engine.

2.

Remove drain plug (1) and drain gear oil.

3.

Set a gasket on drain plug (1) and install it to final drive assem-
bly and tighten to the specified torque. Refer to 

DLN-203,

"Exploded View"

.

CAUTION:

Never reuse gasket.

Refilling

INFOID:0000000006222413

1.

Remove filler plug (1). Fill with new gear oil until oil level reaches
the specified level near filler plug mounting hole.

2.

After refilling oil, check oil level. Set a gasket to filler plug (1),
then install it to final drive assembly. Refer to 

DLN-203,

"Exploded View"

.

CAUTION:

Never reuse gasket.

JPDID0415ZZ

JPDID0392ZZ

Oil grade and viscosity

: Refer to 

MA-10, "Fluids and 

Lubricants"

.

Oil capacity

: Refer to 

DLN-222, "General 

Specification"

.

JPDID0415ZZ

DLN-194

< REMOVAL AND INSTALLATION >

[REAR FINAL DRIVE: R230]

FRONT OIL SEAL

REMOVAL AND INSTALLATION

FRONT OIL SEAL

Exploded View

INFOID:0000000006222414

Removal and Installation

INFOID:0000000006222415

REMOVAL

CAUTION:

Verify identification stamp of replacement frequency put in the lower part of gear carrier to determine
replacement for collapsible spacer when replacing front oil seal. Refer to “Identification stamp of
replacement frequency of front oil seal”. If collapsible spacer replacement is necessary, remove final
drive assembly and disassemble it to replace front oil seal and collapsible spacer.
NOTE:
The reuse of collapsible spacer is prohibited in principle. However, it is reusable on a one-time basis
only in cases when replacing front oil seal.

Identification Stamp of Replacement Frequency of Front Oil Seal

• The diagonally shaded area in the figure shows stamping point for

replacement frequency of front oil seal.

• The following table shows if collapsible spacer replacement is

needed before replacing front oil seal.
When collapsible spacer replacement is required, disassemble
final drive assembly to replace collapsible spacer and front oil seal.
Refer to 

DLN-217, "Disassembly"

.

1.

Final drive assembly

2.

Front oil seal

3.

Companion flange

4.

Drive pinion lock nut

A.

Oil seal lip

: Vehicle front

: Apply gear oil.

: Apply anti-corrosion oil.

Refer to 

GI-4, "Components"

 for symbols not described above.

JPDID0393GB

Stamp

collapsible spacer replacement

No stamp

Not required

PDIA0976E

FRONT OIL SEAL

DLN-195

< REMOVAL AND INSTALLATION >

[REAR FINAL DRIVE: R230]

C

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CAUTION:

Make a stamping after replacing front oil seal.

• After replacing front oil seal, make a stamping on the stamping point in accordance with the table below in

order to identify replacement frequency.

CAUTION:

Make a stamping from left to right.

1.

Make a judgment if a collapsible spacer replacement is required.

2.

Drain gear oil. Refer to 

DLN-193, "Draining"

.

3.

Remove the drive shafts from final drive. Then suspend it by wire, etc. Refer to 

RAX-11, "Removal and

Installation"

.

4.

Remove the side flange using sliding hammer and attachment.

NOTE:
Circular clip installation position: Side flange

5.

Remove the rear propeller shaft. Refer to 

DLN-144, "Removal

and Installation"

.

6.

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

“0” or “0” on the far right of stamp

Required

“01” or “1” on the far right of stamp

Not required

Stamp

collapsible spacer replacement

Stamp before stamping

Stamping on the far right

Stamping

No stamp

0

0

“0”
(Front oil seal was replaced once.)

1

01

“01”
(Collapsible spacer and front oil seal were replaced last time.)

0

010

“0” is on the far right.
(Only front oil seal was replaced last time.)

1

...01

“1” is on the far right.
(Collapsible spacer and front oil seal were replaced last time.)

0

...010

A

: Attachment [SST: KV40104100 (

—

)]

B

: Sliding hammer [SST: ST36230000 (J-25840-A)]

JSDIA0105ZZ

PDIA1006E