Mitsubishi Evolution X. Manual - part 893

AC705202 AB

MB991705

MD998330

ON-VEHICLE SERVICE

TSB Revision

REAR AXLE

27-33

5. Disconnect the hydraulic unit and the AYC pressure tube 

assembly, connect the special tools MB991705, MD998330 
to LH side port, put the lid to RH side port or connect the 
AYC pressure tube disconnected.

6. Using the scan tool, forcibly activate the hydraulic unit (item 

No. 06). (Refer to GROUP 22A 

− Actuator Test 

Table

P.22A-113

.)

NOTE: 

.

•

Forced activation (left clutch operation mode) is contin-
ued for 1 minutes, and then the operation is canceled 
automatically. Also, using the clear key on the scan tool, 
the activation can be forcibly canceled.

•

When the functions are suspended by the fail-safe func-
tion, the hydraulic unit cannot be forcibly activated.

CAUTION

While the oil pressure is checked, add fluid as necessary 
to ensure that it is left in the oil reservoir during the entire 
procedure.
7. Check that the generated oil pressure of the hydraulic unit 

satisfies the standard value.

Standard value: 0.9 

− 1.1 MPa (130 − 159 psi)

8. Check the oil pressure of the clutch right side following step 

4 through 6. Connect the special tool to RH side port, put the 
lid to LH side port or connect AYC pressure tube assembly 
disconnected.

9. Using the scan tool, forcibly activate the hydraulic unit (item 

No. 07). (Refer to GROUP 22A 

− Actuator Test 

Table

P.22A-113

.)

10.If the measured value exceeds the standard value, replace 

the hydraulic unit.

11.Connect the hydraulic unit and AYC pressure tube 

assembly, and tighten them to the specified torque.

Tightening torque: 26 

± 4 N⋅ m (19 ± 3 ft-lb)

12.Connect the AYC differential torque transfer mechanism and 

AYC pressure tube assembly, and tighten them to the 
specified torque.

Tightening torque: 21 

± 3 N⋅ m (16 ± 2 ft-lb)

13.Perform the AYC air bleeding. (Refer to 

P.27-30

.)

WHEEL BEARING END PLAY CHECK

M1271000900894

1. Remove the rear brake disk. (Refer to GROUP36, Parking 

Brake Lining and Drum 

P.36-17

.)

AC710610 AB

ON-VEHICLE SERVICE

TSB Revision

REAR AXLE

27-34

2. Set a dial gauge as shown in the figure. Move the rear wheel 

hub assembly in the axial direction and measure the 
looseness.

Limit: 0.05 mm (0.002 inch)

3. When the looseness exceeds the limit value, replace the 

rear wheel hub assembly. (Refer to 

P.27-36

.)

4. After checking, install the rear brake disk. (Refer to 

GROUP36, Parking Brake Lining and Drum 

P.36-17

.)

HUB BOLT REPLACEMENT

M1271001000548

Required Special Tools:

• MB990767: Front Hub and Flange Yoke Holder

• MB991618: Hub Bolt Remover

1. Remove the rear brake disk. (Refer to GROUP 36, Parking 

Brake Lining and Drum 

P.36-17

.)

AC302114

MB991618

AB

Hub bolt

2. Use special tool MB991618 to remove the hub bolts.

AC205872

MB990767

AE

Plain 
washer

3. Install the plain washer to the new hub bolt, and install the 

bolt with a nut while holding the hub with special tool 
MB990767.

4. Install the rear brake disk. (Refer to GROUP 36, Parking 

Brake Lining and Drum 

P.36-17

.)

AYC DIFFERENTIAL CARRIER OIL SEAL 
REPLACEMENT

M1272001300133

DIFFERENTIAL MECHANISM PART

Required Special Tools:

• MB991245: Lower arm bush ring

1. Remove the driveshaft. (Refer to 

P.27-43

.)

2. Remove the AYC differential carrier oil seal.

AC708667

AC

MB991245

ON-VEHICLE SERVICE

TSB Revision

REAR AXLE

27-35

3. Use special tool MB991245 to press-fit a new oil seal.
4. Apply multi-purpose grease to the oil seal lip and driveshaft 

oil seal seating area.

5. Replace the driveshaft circlip with a new one, and install the 

driveshaft to the differential carrier. (Refer to 

P.27-43

.)

TORQUE TRANSFER MECHANISM PART

Required Special Tools:

• MB990938: Installer bar

• MB991551: Bearing outer race installer

1. Remove the driveshaft. (Refer to 

P.27-43

.)

2. Remove the AYC differential carrier oil seal.

AC708666

AC

MB991551

MB990938

3. Use the special tools MB990938 and MB991551 to press-fit 

a new oil seal.

4. Apply specified grease to the oil seal lip and driveshaft oil 

seal seating area.

Specified grease: Vaseline

REAR AXLE HUB ASSEMBLY

TSB Revision

REAR AXLE

27-36

REAR AXLE HUB ASSEMBLY

REMOVAL AND INSTALLATION

M1271002000972

CAUTION

• Do not disassemble the rear wheel hub assembly.
• The magnetic encoder collects metallic particles easily, because it is magnetized. Make sure that 

the magnetic encoder should not collect metallic particles. Check that there is not any trouble 
prior to reassembling it.

• When the rear wheel hub assembly is removed/installed, make sure that the magnetic encoder 

(integrated with inner oil seal) does not contact with surrounding parts to avoid damage.

• When removing and installing the rear wheel speed sensor, make sure that its sensor head at the 

end does not contact with surrounding parts to avoid damage.

• During maintenance, take care not to contact the parts or tools to the caliper because the paint of 

caliper will be scratched. And if there is brake fluid on the caliper, wipe off quickly.

•

AC705223

2

3

4

5

6

AB

1

N

7

N

N

144   176 N·m
107  129 ft-lb 

 

95 ± 14 N·m
70 ± 10 ft-lb

8.5 ± 1.5 N·m
76 ±13 in-lb

11 ± 2 N·m
98 ± 17 in-lb

Removal steps 

1. Cotter pin

<<

A

>>

>>

A

<<

2. Rear driveshaft nut

>>

A

<<

3. Washer
4. Rear wheel speed sensor and 

brake hose fixing bolt

5. Rear wheel speed sensor

6. Rear brake disk (Refer to GROUP 

36, Parking Brake Lining and 
Drum 

P.36-17

.)

<<

B

>>

7. Rear wheel hub assembly

The part indicated with * is the bolt with friction coefficient stabilizer. In removal, replace it with a 
new one.

Removal steps (Continued)