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
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]
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E
F
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A
B
DLN
N
O
P
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.
.
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
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
CAUTION:
Never reuse gasket.
JPDID0415ZZ
JPDID0392ZZ
Oil grade and viscosity
: Refer to
Oil capacity
: Refer to
.
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
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
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]
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DLN
N
O
P
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
.
3.
Remove the drive shafts from final drive. Then suspend it by wire, etc. Refer to
.
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
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
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