Mitsubishi Montero Sport (2004+). Manual — part 421

PROPELLER SHAFT DIAGNOSIS

TSB Revision

PROPELLER SHAFT

25-3

PROPELLER SHAFT DIAGNOSIS

INTRODUCTION TO PROPELLER SHAFT DIAGNOSIS

M1251001800092

If an abnormal noise is heard from the propeller shaft
while driving, some parts of the propeller shaft may
be worn or damaged, or some mounting bolts may
be loose.

PROPELLER SHAFT DIAGNOSTIC TROUBLESHOOTING STRATEGY

M1251001900107

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted all of the possible ways to find a pro-
peller shaft fault.
1. Gather information from the customer.

2. Verify that the condition described by the

customer exists.

3. Find the malfunction by following the Symptom

Chart.

4. Verify malfunction is eliminated.

SYMPTOM CHART

M1251002000088

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Noise at Start

DIAGNOSIS

STEP 1. Check if the propeller shaft mounting bolts and

nuts are loose. (Refer to

P.25-6

.)

Q: Are the bolts and nuts tightened to 49

− 58 N⋅m (37 − 43

ft-lb) <3.0L engine> or 98

− 108 N⋅m (72 − 80 ft-lb) <3.5L

engine>?
YES : Go to Step 2.
NO : Tighten the bolts and nuts to 49

− 58 N⋅m (37 − 43

ft-lb). Then go to Step 5.

STEP 2. Check the universal joint's journal bearing of front

propeller shaft for wear or damage. (Refer to

P.25-10

.)

Q: Is wear or damage apparent?

YES : Replace the journal bearing. Then go to Step 5.
NO : Go to Step 3.

STEP 3. Check the BJ assembly's spline of front propeller
shaft for wear.
Q: Is wear apparent?

YES : Replace the propeller shaft. Then go to Step 5.
NO : Go to Step 4.

SYMPTOM

INSPECTION
PROCEDURE

REFERENCE
PAGE

Noise at start

1

P.25-3

Noise and vibration at high speed

2

P.25-4

PROPELLER SHAFT DIAGNOSIS

TSB Revision

PROPELLER SHAFT

25-4

STEP 4. Check the flange sleeve spline of rear propeller
shaft for wear.
Q: Is wear apparent?

YES : Replace the rear propeller shaft. Then go to Step 5.
NO : Go to Step 5.

STEP 5. Retest the system.
Q: Is the abnormal noise eliminated?

YES : The procedure is complete.
NO : Recheck from Step1.

INSPECTION PROCEDURE 2: Noise and Vibration at High Speed

DIAGNOSIS

STEP 1. Check the front propeller shaft run-out.

Q: Is measured value within the limit: 0.6 mm (0.02 inch)?

YES : Go to Step 2.
NO : Replace the front propeller shaft. Then go to Step 5 .

STEP 2. Check the front propeller shaft snap rings

thickness. (Refer to

P.25-10

.)

Q: Are they correct?

YES : Go to Step 3.
NO : Replace the snap ring. Then go to Step 5 .

STEP 3. Check the front propeller shaft journal bearings

for wear or damage. (Refer to

P.25-10

.)

Q: Is wear or damage apparent?

YES : Replace the journal bearing. Then go to Step 5 .
NO : Go to Step 4.

STEP 4. Check the rear propeller shaft for wear or damage.

(Refer to

P.25-9

.)

Q: Is wear or damage apparent?

YES : Replace the rear propeller shaft. Then go to Step 5 .
NO : Go to Step 5.

ACX00643

SPECIAL TOOL

TSB Revision

PROPELLER SHAFT

25-5

STEP 5. Retest the system.
Q: Is the abnormal noise eliminated?

YES : The procedure is complete.
NO : Recheck from Step1.

SPECIAL TOOL

M1251000600125

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MB990840
Universal joint
remover/installer

MB990840-01

Disassembly and
assembly of universal
joint

MB991410
Collar

−

Disassembly and
assembly of universal
joint

MB990840

MB991410

PROPELLER SHAFT

TSB Revision

PROPELLER SHAFT

25-6

PROPELLER SHAFT

REMOVAL AND INSTALLATION

M1251001000278

Pre-removal Operation <4WD>
• Set the Transfer Shift Lever to "2H."

• Transfer Gear Oil Draining (Refer to GROUP 00, Mainte-

nance Service

P.00-53

.)

Post-installation Operation <4WD>
• Transfer Gear Oil Supplying (Refer to GROUP 00, Main-

tenance Service

P.00-53

.)

AC103633

GEAR OIL:
HYPOID GEAR OIL API CLASSIFICATION
GL-4 OR HIGHER/SAE VISCOSITY 80W,
75W - 85W

<RWD>

<4WD>

AD

1

N

2

3

30 - 34 N·m
22 - 25 ft-lb

49 - 59 N·m
36 - 43 ft-lb

34 N·m
25 ft-lb

98 - 108 N·m
72 - 80 ft-lb

98 - 108 N·m
72 - 80 ft-lb

REMOVAL STEPS

<<A>>

>>A<<

1.

PROPELLER SHAFT ASSEMBLY

<<A>>

>>A<<

2.

REAR PROPELLER SHAFT
ASSEMBLY

<<A>>

>>A<<

3.

FRONT PROPELLER SHAFT
ASSEMBLY

REMOVAL STEPS (Continued)