Mitsubishi Grandis. Manual - part 971

OIL PUMP

AUTOMATIC TRANSMISSION OVERHAUL

23B-40

CAUTION

Apply ATF to the oil pump drive hub before 
installing the torque converter. Be careful not to 
damage the oil seal lip when installing the torque 
converter.
94.Install the torque converter, and secure it so that 

the dimension (A) indicated in the drawing meets 
the reference value.

Reference value: 12.2 mm

OIL PUMP

DISASSEMBLY AND REASSEMBLY

M1233001300187

AK301063AC

1

3

2

Apply automatic
transmission fluid
to all moving parts
before installation.

Disassembly steps

>>B<<

1.

O-ring

2.

Seal ring

>>A<<

3.

Oil seal

Disassembly steps (Continued)

UNDERDRIVE CLUTCH AND INPUT SHAFT

AUTOMATIC TRANSMISSION OVERHAUL

23B-41

REASSEMBLY SERVICE POINTS
>>A<< OIL SEAL INSTALLATION

Use the special tool Oil seal installer (MD998334) to 
install the oil seal.

>>B<< O-RING INSTALLATION

Install a new O-ring in the groove on the periphery of 
the oil pump, and apply ATF, blue petrolatum jelly or 
white Vaseline to the periphery of the O-ring.

UNDERDRIVE CLUTCH AND INPUT SHAFT

DISASSEMBLY AND REASSEMBLY

M1233020900133

AK300522AC

MD998334

AK301062AC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Apply automatic
transmission fluid
to all moving parts
before installation.

UNDERDRIVE CLUTCH AND INPUT SHAFT

AUTOMATIC TRANSMISSION OVERHAUL

23B-42

DISASSEMBLY SERVICE POINTS
<<A>> SNAP RING REMOVAL

Use the special tools to remove the snap ring.

• Spring compressor (MD998907)

• Spring compressor retainer (MD998924)

REASSEMBLY SERVICE POINTS
>>A<< D-RING INSTALLATION

Apply ATF, blue petrolatum jelly or white Vaseline to 
the D-rings and handle them carefully not to damage 
them during installation.

>>B<< SNAP RING INSTALLATION

Use the special tools to install the snap ring.

• Spring compressor (MD998907)

• Spring compressor retainer (MD998924)

>>C<< CLUTCH PLATE/CLUTCH 
DISC/CLUTCH REACTION PLATE 
INSTALLATION

CAUTION

Soak the clutch discs in ATF before assembling 
it.
1. Assemble the clutch plates, clutch discs, and 

clutch reaction plates with their non-toothed 
portions (A in the drawing) aligned with the hole 
(B in the drawing) formed in a crest of the 
underdrive clutch retainer.

2. Orient the clutch reaction plate as shown in the 

drawing when it is installed.

>>D<< SNAP RING INSTALLATION

1. Install the snap ring.

Disassembly steps

1.

Snap ring

2.

Input shaft

3.

Seal ring

>>D<<

4.

Snap ring

>>C<<

5.

Clutch reaction plate

>>C<<

6.

Clutch disc

>>C<<

7.

Clutch plate

<<A>>

>>B<<

8.

Snap ring

9.

Spring retainer

>>A<<

10. D-ring
11. Return spring
12. Underdrive clutch piston

>>A<<

13. D-ring

>>A<<

14. D-ring
15. Underdrive clutch retainer

AK300523AC

MD998907

MD998924

AK301292AB

D-ring

Underdrive clutch retainer

Underdrive clutch piston

Spring retainer

AK300523AC

MD998907

MD998924

AK301272AB

A

B

AK202042

Clutch 
plates

Shear droop

Clutch 
reaction 
plate

Clutch discs

AB

REVERSE AND OVERDRIVE CLUTCH

AUTOMATIC TRANSMISSION OVERHAUL

23B-43

2. Press down the clutch reaction plate on its entire 

circumference using the special tools.

• Spring compressor (MB991628)

• Spring compressor retainer (MD998924)

3. Check the clearance between the snap ring and 

clutch reaction plate. If the clearance is not within 
the standard value range, make adjustment by 
selecting a snap ring of an appropriate thickness.

Standard value:1.6 

− 1.8 mm 

REVERSE AND OVERDRIVE CLUTCH

DISASSEMBLY AND REASSEMBLY

M1233021200182

AK300524AC

MD998924

MB991628

AK301054AC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

1 2 4

6

8

13

15

19

12

17

18

16

14

11

7

3

5

9

10

Apply automatic
transmission fluid
to all moving parts
before installation.