Mitsubishi Montero Sport (2004+). Manual — part 405
26-1
GROUP 26
FRONT AXLE
CONTENTS
GENERAL DESCRIPTION. . . . . . . . .
FRONT AXLE DIAGNOSIS . . . . . . . .
INTRODUCTION TO FRONT AXLE
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . . .
FRONT AXLE DIAGNOSTIC
TROUBLESHOOTING STRATEGY . . . . . .
SYMPTOM CHART. . . . . . . . . . . . . . . . . . .
SYMPTOM PROCEDURES . . . . . . . . . . . .
SPECIAL TOOLS. . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE. . . . . . . . . . .
FRONT AXLE TOTAL BACKLASH CHECK
FRONT AXLE GEAR OIL LEVEL CHECK .
DRIVE SHAFT END PLAY CHECK . . . . . .
FRONT AXLE HUB ASSEMBLY . . . .
REMOVAL AND INSTALLATION . . . . . . . .
DISASSEMBLY AND ASSEMBLY . . . . . . .
KNUCKLE . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
INSPECTION . . . . . . . . . . . . . . . . . . . . . . .
DISASSEMBLY AND ASSEMBLY <4WD> .
DRIVE SHAFT ASSEMBLY . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
DISASSEMBLY AND ASSEMBLY . . . . . . .
BJ BOOT (RESIN BOOT) REPLACEMENT
INNER SHAFT ASSEMBLY . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
DISASSEMBLY AND ASSEMBLY . . . . . . .
DIFFERENTIAL CARRIER
ASSEMBLY. . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . .
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS . . . . . . . . . . . . . . .
FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . .
GENERAL SPECIFICATIONS . . . . . . . . . .
SERVICE SPECIFICATIONS . . . . . . . . . . .
LUBRICANTS . . . . . . . . . . . . . . . . . . . . . . .
SEALANTS AND ADHESIVES . . . . . . . . . .
GENERAL DESCRIPTION
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FRONT AXLE
26-2
GENERAL DESCRIPTION
M1261000100228
RWD
• The front hub assembly which uses a double
taper roller bearing is mounted on the knuckle
spindle. For vehicles with ABS, a rotor for detect-
ing the wheel speed is press-fitted into the front
hub.
4WD
• The front axle consists of the hub assembly, drive
shaft, inner shaft, front differential. The features
are:
• The wheel bearing uses a double taper roller
bearing. For vehicles with ABS, a rotor for detect-
ing the wheel speed is bolted to the brake disc.
• Drive shafts of almost identical length reduce
torque steer. In addition, a DOJ-BJ-type constant
velocity ball joint has high power transmission
efficiency and reduces vibration and noise.
• Full time 4WD mechanism has been adopted.
• There are two types of differential gear. The dif-
ference between them is gear ratio.
NOTE:
.
DOJ: Double Offset Joint
BJ: Birfield Joint
FRONT AXLE DIAGNOSIS
INTRODUCTION TO FRONT AXLE DIAGNOSIS
M1261005500179
The full time 4WD mechanism has been adopted for
the 4WD vehicles.
Noise from the driveshaft, inner shaft or differential
can be caused by a component defect.
FRONT AXLE DIAGNOSTIC TROUBLESHOOTING STRATEGY
M1261005600198
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a
front axle 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
M1261005700214
SYMPTOM
INSPECTION
PROCEDURE
REFERENCE PAGE
Driveshaft,
inner shaft
Noise during wheel rotation
1
Noise due to excessive wheel play in
turning direction
2
Differential
Constant noise
3
Gear noise while driving
4
Gear noise while coasting
5
Bearing noise while driving or coasting
6
Noise while turning
7
Heat
8
Oil leakage
9
FRONT AXLE DIAGNOSIS
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FRONT AXLE
26-3
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: Noise during Wheel Rotation
DIAGNOSIS
STEP 1. Check the housing tube and inner shaft
for bending.
Q: Is the housing tube and inner shaft bent?
YES :
Replace the part. Then go to Step 4.
NO :
Go to step 2.
STEP 2. Check the inner shaft bearing for wear.
Q: Is the inner shaft bearing worn?
YES :
Replace the bearings. Then go to Step 4.
NO :
Go to Step 3.
STEP 3. Check the driveshaft assembly for wear,
damage or bending.
Q: Is the driveshaft assembly worn, damaged or bent?
YES :
Replace the driveshaft assembly. Then go
to Step 4.
NO :
There is no action to be taken.
STEP 4. Retest the system.
Q: Is the abnormal noise eliminated?
YES :
The procedure is complete.
NO :
Repeat from Step 1.
INSPECTION PROCEDURE 2: Noise Due to Excessive Wheel Play in Turning Direction
DIAGNOSIS
STEP 1. Check for play in the inner shaft and side
gear serration, the driveshaft and side gear, or
the driveshaft and drive flange.
Q: Is play found?
YES :
Adjust or replace the part. Then go to Step
NO :
The procedure is complete.
STEP 2. Retest the system.
Q: Is the abnormal noise eliminated?
YES :
The procedure is complete.
NO :
Repeat from Step 1.
FRONT AXLE DIAGNOSIS
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FRONT AXLE
26-4
INSPECTION PROCEDURE 3: Constant Noise
DIAGNOSIS
STEP 1. Check the oil level.
Remove the filler plug and check the gear oil level.
Q: Is the gear oil level more than 8 mm (0.3 inch) below the
bottom of the filler plug hole?
YES : Check the oil leakage from differential carrier, and
repair if necessary. Then, refill Hypoid gear oil API
classification GL-5 or higher; Above
−23°C(−10°F):
SAE 90, 85W-90, 80W-90, From
−34 to −23°C(−30 to
−10°F): SAE 80W, 80W-90, Below −34°C(−30°F):
SAE 75W. Then go to Step 9.
NO : Go to Step 2.
STEP2. Check the tooth contact (engagement) of the drive
gear and drive pinion. Refer to
Q: Is the tooth contact (engagement) of the drive gear and
drive pinion correct?
YES : Go to Step 3.
NO : Adjust or replace the part. Then go to Step 9.
STEP3. Check the side bearing for looseness, wear or
damage.
Q: Is the side bearing loosened, worn or damaged?
YES : Adjust or replace the part. Then go to Step 9.
NO : Go to Step 4.
STEP 4. Check the drive pinion bearing for wear or
damage.
Q: Is the drive pinion bearing worn or damaged?
YES : Adjust or replace the part. Then go to Step 9.
NO : Go to Step 5.
STEP 5. Check the drive gear and drive pinion for wear.
Q: Is the drive gear or drive pinion worn?
YES : Replace the part. Then go to Step 9.
NO : Go to Step 6.
STEP 6. Check the side gear thrust washer or pinion shaft
for wear.
Q: Is the side gear thrust washer or pinion shaft worn?
YES : Replace the part. Then go to Step 9.
NO : Go to Step 7.
AC000439
UPPER LIMIT
LOWER LIMIT
AB
8 mm (0.3 in)
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