Mitsubishi 380. Manual - part 466

AK300469

TRANSMISSION

AUTOMATIC TRANSMISSION OVERHAUL

23B-24

54.Remove the snap ring.

AK300470

55.Remove the second brake piston and the return 

spring.

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56.Remove the pressure plate, second brake discs 

(four pieces) and second brake plates (three 
pieces).

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57.Remove the planetary carrier assembly.

AK300473

58.Remove the snap ring.

AK300474

59.Remove the reaction plate and the brake disc.

AK300475

60.Remove the snap ring.

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61.Remove the brake plates (five pieces), brake 

discs (six pieces) and pressure plate.

TRANSMISSION

AUTOMATIC TRANSMISSION OVERHAUL

23B-25

NOTE: *Includes the brake discs removed in step 
57.

AK300477

62.Remove the wave spring.

AK202194

MD998924

MD999577

AC

63.Remove the one-way clutch inner race and low-

reverse brake piston as follows:
(1) Using special tools to compress the one-way 

clutch inner race.

• Spring compressor (MD999577)

• Spring compressor retainer (MD998924)

(2) Remove the snap ring.
(3) Remove the special tools.
(4) Remove the one-way clutch inner race, O-ring, 

spring retainer, return spring and low-reverse 
brake piston.

AK300479

AK303642AE

Bolt (Four)

Bolt 
(Four)

64.Remove the transfer drive gear bearing mounting 

bolts (four pieces).

 

Then, turn the gear 1/8 turn and remove the 
remaining bolts (four pieces).

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65.Remove the transfer drive gear.

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66.Remove the snap ring.

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TRANSMISSION

AUTOMATIC TRANSMISSION OVERHAUL

23B-26

67.Remove the one-way clutch.

68.Remove the seal rings (two pieces).

69.Remove the needle bearing.

70.Remove the differential bearing outer race from 

the transmission case.

REASSEMBLY

CAUTION

• Never reuse any gasket, O-ring, and oil seal. 

Always replace them with new ones.

• Never use any product other than blue petro-

latum jelly or white Vaseline to lubricate or 
hold parts during assembly.

• Apply ATF to friction elements, rotating parts, 

and sliding parts before installation.Soak new 
clutch discs or brake discs in ATF for at least 
two hours before installing them.

• Never apply sealant or adhesive to gaskets.
• When a bushing requires replacement, 

replace the assembly of which the bushing 
forms a part.

• Never use any cloth gloves or any rags during 

reassembly. Use only nylon cloth or paper 
towels if necessary.

•

AK301090AE

MD998412

Change also the ATF in the cooler circuit.

1. Install special tool Guide (MD998412) in the 

installation screw hole of the transfer drive gear 
bearing located in the transmission case. Using 
this as a guide, install the transfer drive gear 
bearing and gear in the transmission case.

AK300489

2. Tighten the mounting bolts (eight pieces) of the 

transfer drive gear bearing to the specified torque 
of 34 

± 2 N⋅m.

AK301620AC

Low-reverse brake piston

Return spring

Spring retainer

3. Install the low-reverse brake piston, return spring, 

and spring retainer into the transmission case.

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One-way clutch inner race

O-ring

AC

4. Fit a new O-ring into the groove of one-way clutch 

inner race.

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Transmission case

Identification

notches

AB

A

A

TRANSMISSION

AUTOMATIC TRANSMISSION OVERHAUL

23B-27

5. Check the placement of the identification notches 

in the one-way clutch inner race. Install the one-
way clutch inner race to the transfer drive gear 
bearing so that the notches fall along the A 

− A 

line.

AK202194

MD998924

MD999577

AC

6. Put the snap ring on the inner race.

7. Set special tools as shown, and then compress 

the one-way clutch inner race and install the snap 
ring.

• Spring compressor (MD999577)

•

AK300491

Spring compressor retainer (MD998924)

8. Install the wave spring onto the low-reverse brake 

piston.

AK303645

Snap ring

Reaction plate

MB991632

AE

9. Install the brake discs (six pieces), brake plates 

(five pieces) and snap ring as shown in the figure.

NOTE: Do not install the pressure plate at this 
time.

10.Install special tool Clearance dummy plate 

(MB991632) on the brake disc.

11.Install the reaction plate and the used snap ring.

12.Move special tool Clearance dummy plate 

(MB991632) to measure the end play of reaction 
plate. Then replace the snap ring installed in step 
11 to adjust the end play to standard value.

Standard value: 0 

− 0.16 mm

AK303646

Second brake piston

MB991632

Snap ring

Return spring

AD

13.Install the brake discs (four pieces) and brake 

plates (three pieces) as shown in the figure.