Infiniti M45 (Y34). Manual - part 701

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

PR-3

C

E

F

G

H

I

J

K

L

M

A

B

PR

NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING

PFP:00003

NVH Troubleshooting Chart

ADS0001V

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

×

: Applicable

Reference page

—

Re

fe

r to

 

PR-

4

  f

o

r det

ai

ls

.

—

—

—

Re

fe

r to

 

PR-

4

  f

o

r det

ai

ls

.

—

Re

fe

r 

to

 NVH 

in

 RFD s

e

c

tio

n

 f

o

r d

e

ta

ils

.

Re

fe

r to

 NVH in

 F

AX, 

RAX,

 FSU, a

n

d

 RSU s

e

c

ti

o

n

 fo

r d

e

ta

ils

.

N

V

H

 in

 t

o

 W

T

 s

e

c

tio

n

 f

o

r d

e

ta

ils

.

NVH i

n

 W

T

 s

e

c

tio

n

 f

o

r d

e

ta

ils

.

Possible cause and SUSPECTED PARTS

U

n

e

v

en r

o

ta

ti

on t

o

rq

u

e

C

e

n

ter

 b

ear

in

g i

m

pr

oper

 i

n

s

ta

lla

ti

o

n

Exc

e

ss

iv

e

 c

ent

er

 be

ar

ing ax

ia

l end

 pl

ay

C

e

n

ter

 b

ear

in

g m

o

unt

in

g (

insul

at

or

) 

cr

a

cks

, 

dam

ag

e o

r 

det

er

io

ra

ti

on

Ex

c

e

s

s

iv

e

 jo

in

t a

n

g

le

R

o

ta

ti

o

n

 i

m

bal

an

ce

Exc

e

ss

iv

e

 r

uno

ut

DIFFERENTIAL

AXLE

 AND 

SUSPENSION

TIRES

ROAD W

H

EEL

DRIVE SHAF

T

BRAKES

STEERING

Symptom

PROPELLER 
SHAFT

Noise

×

×

×

×

×

×

×

×

×

×

×

×

×

×

Shake

×

×

×

×

×

×

×

×

Vibration

×

×

×

×

×

×

×

×

×

×

×

PR-4

REAR PROPELLER SHAFT

REAR PROPELLER SHAFT

PFP:37000

On-Vehicle Service

ADS0001W

PROPELLER SHAFT VIBRATION

CAUTION:

If vibration is present at high speed, check mounting between propeller shaft and companion flange.
If vibration is present at high speed, inspect propeller shaft runout first. 

1.

Measure propeller shaft runout at several points by rotating final
drive companion flange with hands.

Propeller shaft runout measuring points:

Unit: mm (in)

2.

If runout still exceeds specifications, disconnect propeller shaft at final drive companion flange: then rotate
companion flange 60, 120, 180, 240, 300 degrees and reconnect propeller shaft.

3.

Check runout again. If runout still exceeds specifications, replace propeller shaft assembly.

4.

Perform driving test to check.

5.

If the runout exceeds the service limit, do the following:

●

Remove the propeller shaft from the final drive companion flange.

●

Turn the propeller shaft 60, 120, 180, 240, 300 degrees and reinstall the propeller shaft to the compan-
ion flange, then measure the runout again. 

●

If the runout still exceeds the service limit, replace the propeller shaft assembly.

●

Check the vibration by driving the vehicle.

APPEARANCE AND NOISE INSPECTION

●

Inspect propeller shaft tube surface for dents or cracks. If damaged, replace propeller shaft assembly.

●

If center bearing is noisy or damaged, replace propeller shaft assembly.

Runout limit

:0.6 mm (0.024 in) or less

SDIA1958E

Distance

A

B

C

A/T

162 (6.38)

160 (6.30)

185 (7.28)

SDIA1367E

REAR PROPELLER SHAFT

PR-5

C

E

F

G

H

I

J

K

L

M

A

B

PR

Removal and Installation

ADS0001X

REMOVAL

1.

Move A/T select lever to N range position and release the parking brake.

2.

Remove exhaust front tube and center muffler. Refer to 

EX-3, "EXHAUST SYSTEM"

  for details.

3.

Remove floor reinforcement.

4.

Loosen center bearing bracket fixing nuts with power tool.

CAUTION:

Do not remove center bearing bracket fixing nuts.

1.

Floor reinforcement

2.

1st propeller shaft

3.

Center bearing mounting bracket 
(Lower)

4.

2nd propeller shaft

5.

Clip

6.

Center bearing mounting bracket 
(Upper)

PDIA0881E

SDIA1000E

SDIA1001E

PR-6

REAR PROPELLER SHAFT

5.

Put matching marks on flange and rear propeller shaft. (A/T side
and final drive side)

6.

Remove propeller shaft fixing bolts. (A/T side and final drive
side)

7.

Remove center bearing bracket fixing nuts.

8.

Remove propeller shaft from vehicle. 

INSPECTION

●

Inspect propeller shaft runout. If runout exceeds specifications,
replace propeller shaft assembly.

Propeller shaft runout measuring points:

Unit: mm (in)

INSTALLATION

1.

Paying attention to following items, install in the reverse order of removal.

a.

Install the propeller shaft onto the rear final drive companion
flange while aligning the matching marks that are marked during
removal.

SDIA1522E

Runout limit

: 0.6 mm (0.024 in) or less

SDIA2071E

Distance

A

B

C

A/T

162 (6.38)

160 (6.30)

185 (7.28)

SDIA1367E

SDIA1522E