Mitsubishi Galant (2004+). Manual - part 1644

REVERSE AND OVERDRIVE CLUTCH

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AUTOMATIC TRANSAXLE OVERHAUL

23B-65

DISASSEMBLY SERVICE POINT

.

<<A>> SNAP RING REMOVAL
1. Set special tools MD999590 and MD998924 as shown in the 

illustration.

2. Compress the return spring and remove the snap ring.

ASSEMBLY SERVICE POINTS

.

>>A<< D-RING INSTALLATION
1. Install D-rings in the grooves on the reverse clutch retainer, 

piston, overdrive clutch piston and spring retainer. Be careful 
not to twist or damage the D-rings.

2. Apply ATF or petroleum jelly (Vaseline) to D-rings.

.

>>B<< REVERSE CLUTCH PISTON INSTALLATION
Align the outer circumference holes ("A" and "B") of the reverse 
clutch piston and the reverse clutch retainer to assemble them.

.

>>C<< SNAP RING INSTALLATION
1. Set special tools MD999590 and MD998924 as shown in the 

illustration.

2. Tighten the nut on the special tool to press down on the 

spring retainer and reverse clutch retainer, and then install 
the snap ring.

AK300525AD

MD999590

MD998924

AK301765

D-RING

REVERSE CLUTCH RETAINER

REVERSE CLUTCH PISTON

OVERDRIVE CLUTCH PISTON

SPRING RETAINER

AB

AK301276AC

A

B

AK300525AD

MD999590

MD998924

REVERSE AND OVERDRIVE CLUTCH

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AUTOMATIC TRANSAXLE OVERHAUL

23B-66

3. Check that the clearance between the snap ring and the 

return spring retainer is within the standard value. If not 
within the standard value, select a snap ring to achieve the 
standard value clearance.

Standard value: 0 

− 0.09 mm (0 − 0.0035 inch)

.

>>D<< PRESSURE PLATE/CLUTCH PLATE/CLUTCH 
DISC/CLUTCH REACTION PLATE INSTALLATION
1. Install the pressure plate in the direction shown <F4A5A>.

CAUTION

Immerse the clutch disc in ATF before assembling it. If the 
clutch disc is new, soak it in ATF for more than two hours.
2. Assemble the clutch discs and clutch plates, one on top of 

the other, inside the reverse clutch piston. Assemble both 
clutch plates so that the places with no teeth (marked "A") 
are aligned with the holes in the retainer (marked "B").

NUMBER OF CLUTCH DISCS AND CLUTCH PLATES

3. Install the clutch reaction plate in the direction shown.

.

AK300526

MODEL

CLUTCH DISC

CLUTCH PLATE

F4A4B

4

4

F4A5A

4

3

AK301766

CLUTCH PLATES ROUNDED EDGE

CLUTCH DISCS

CLUTCH 
REACTION  
PLATE

AC

<F4A4B>

AK303676AB

CLUTCH DISCS

CLUTCH 
REACTION 
PLATE

PRESSURE 
PLATE

ROUNDED EDGE

CLUTCH
PLATES

<F4A5A>

AK301272AC

A

B

REVERSE AND OVERDRIVE CLUTCH

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AUTOMATIC TRANSAXLE OVERHAUL

23B-67

>>E<< SNAP RING INSTALLATION
1. Install the snap ring into the groove in the reverse clutch 

piston.

2. Set special tools MB991628 <F4A4B> or MB991629 

<F4A5A> and MD998924 as shown in the illustration, and 
compress the clutch element.

3. Check that the clearance between the snap ring and the 

clutch reaction plate is within the standard value. If not within 
the standard value, select a snap ring to achieve the 
standard value clearance.

Standard value: 1.6 

− 1.8 mm (0.0630 − 0.0709 inch)

.

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

CAUTION

Immerse the clutch disc in ATF before assembling it. If the 
clutch disc is new, soak it in ATF for at least two hours.
1. Assemble two clutch discs and two clutch plates, one on top 

of the other, inside the reverse clutch retainer. Assemble 
both clutch plates so that the places with no teeth (marked 
"A") are aligned with the holes in the retainer (marked "B").

2. Install the clutch reaction plate in the direction shown. Install 

it the same as the clutch plate, so that the places with no 
teeth (marked "A") are aligned with the holes in the retainer 
(marked "B").

.

>>G<< SNAP RING INSTALLATION
1. Install the snap ring into the groove of reverse clutch 

retainer.

2. Set special tools MB991790 <F4A4B> or MB991789 

<F4A5A> and MD998924 as shown in the illustration, and 
compress the clutch element.

3. Check that the clearance between the snap ring and the 

clutch reaction plate is within the standard value. If not within 
the standard value, select a snap ring to achieve the 
standard value clearance.

Standard value: 1.5 

− 1.7 mm (0.0591 − 0.0669 inch)

AK202313

MD998924

AG

MB991628 
<F4A4B> OR 
MB991629 
<F4A5A>

AK301272AC

A

B

AK301320

AK301320

AC

CLUTCH 
PLATES

ROUNDED 
EDGE

CLUTCH DISCS

CLUTCH 
REACTION 
PLATE

AK300528AD

MB991790 <F4A4B> OR 
MB991789 <F4A5A>

MD998924

PLANETARY GEAR

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PLANETARY GEAR

DISASSEMBLY AND ASSEMBLY

M1233002500173

AK301602

1

3

4

6

2

5

7

9

8

10

AB

APPLY AUTOMATIC
TRANSMISSION FLUID
TO ALL MOVING PARTS
BEFORE INSTALLATION.

DISASSEMBLY STEPS

1.

STOPPER PLATE

>>B<<

2.

ONE-WAY CLUTCH

3.

SNAP RING

4.

OUTPUT PLANETARY CARRIER

>>A<<

5.

THRUST BEARING NUMBER 3

6.

UNDERDRIVE SUN GEAR

>>A<<

7.

THRUST BEARING NUMBER 4

8.

SNAP RING

9.

OVERDRIVE PLANETARY 
CARRIER

10. OVERDRIVE ANNULUS GEAR

DISASSEMBLY STEPS