Mitsubishi 380. Manual - part 437

SPECIAL TOOLS

AUTOMATIC TRANSMISSION

23A-288

MB991897
Ball joint remover

MB991113-01, 
MB990635-01 or   
general service 
tool

Knuckle and tie rod end ball joint 
breakaway torque check

NOTE: Steering linkage 
puller(MB990635 or MB991113)is 
also used to disconnect knuckle 
and tie rod end ball joint.

MB990241
Axle shaft puller

A: MB990242

Puller shaft

B: MB990244

Puller bar

MB990241-01 or 
General service 
tool

Removal of the drive shaft

MB991354
Puller body

General service 
tool

MB990767
End yoke holder

MB990767-01

Fixing of the hub

A: MB991017
B: MB990998
C: MB991000
A, B: Front hub remover 

and installer

C: Spacer

MB990998-01

• Removal of the hub

• Provisional holding of the wheel 

bearing

• Measurement of hub starting 

torque

• Measurement of wheel bearing 

end play

NOTE: MB991000, which 
belongs to MB990998, should be 
used as a spacer.

TOOL

TOOL NUMBER AND 
NAME

SUPERSESSION APPLICATION

AC106827

MB990241AB

A

B

MB991354

B990767

AC100320 AB

A

B

C

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-289

ON-VEHICLE SERVICE

A/T CONTROL COMPONENT LAYOUT

M1231008600343

NAME

SYMBOL NAME

SYMBOL

A/T control relay

B

A/T-ECU

E

A/T control solenoid valves

D

Stoplight switch

F

Data link connector

G

Sports mode shift switch

H

Input shaft speed sensor

A

Transmission fluid temperature sensor

D

Output shaft speed sensor

A

Transmission inhibitor switch

C

10DB134A

<3.8L ENGINE>

A

C

D

E

B

10DB135A

F

G

H

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-290

AC207308AI

INPUT SHAFT

SPEED SENSOR

OUTPUT SHAFT

SPEED SENSOR

BATTERY

A

10DB136A

B

A/T 
CONTROL 
RELAY

RELAY BOX

10DB137A

B-110 (B)

TRANSMISSION

INHIBITOR SWITCH

C

10DB138A

Underdrive
solenoid
valve

Second
solenoid
valve

Damper
control clutch
solenoid
valve

Overdrive
solenoid
valve

Low-reverse
solenoid
valve

Reduction (RED)
solenoid
valve

Transmission fluid
temperature
sensor

Valve body
asssembly

D

10DB139A

E

COVER

A/T

CONTROL

UNIT

AIR

CLEANER

AC004673AE

STOPLIGHT SWITCH

BRAKE PEDAL

F

10DB140A

ACCELERATOR
PEDAL

G

SHIFT SWITCH 
(UP SIDE)

SHIFT SWITCH 
(DOWN SIDE)

10DB168A

SPORTS MODE
SHIFT SWITCH

H

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-291

ESSENTIAL SERVICE

TRANSMISSION FLUID CHECK

M1231021400050

1. Drive the vehicle until the transmission fluid temperature 

rises to the normal operating temperature [70 

− 80°C (158 − 

176

°F)].

NOTE: The transmission fluid temperature is measured with 
diagnostic tool MB991958 (MUT-III sub assembly).

NOTE: If it takes some amount of time until the transmission 
fluid reaches its normal operating temperature [70 

− 80°C 

(158 

− 176°F)], check the transmission fluid level by refer-

ring to the left diagram.

2. Park the vehicle on a level surface.

3. Move the selector lever through all positions to fill the torque 

converter and the hydraulic circuits with fluid, and then move 
the selector lever to the "N" position.

4. After wiping off any dirt around the dipstick, remove the 

dipstick and check the condition of the transmission fluid.

NOTE: If the transmission fluid smells as if it is burnt, it 
means that the transmission fluid has been contaminated by 
fine particles from the bushings and friction materials. 
Transmission overhaul and cooler line flushing may be nec-
essary.

5. Check transmission fluid level is at the "HOT" mark on the 

dipstick. If the transmission fluid level is less than this, add 
DIAMOND ATF SP III until the level reaches the "HOT" 
mark.

NOTE: If the transmission fluid level is too low, the oil pump 
will draw in air along with the transmission fluid, which will 
cause to form bubbles. If the transmission fluid level is too 
high, rotating components inside the transmission will churn 
the fluid and air into a foamy liquid. Both conditions (level 
too low or too high) will cause the hydraulic pressure to 
drop, which will result in late shifting and slipping of the 
clutches and brakes.

NOTE: In either case, air bubbles can interfere with normal 
valve, clutch, and brake operation. Also, foaming can cause 
transmission fluid to escape from the transmission vent 
where it may be mistaken for a leak.

6. Securely insert the dipstick.

NOTE: The transmission fluid should always be replaced 
under the following conditions:
.

• When troubleshooting the transmission.

• When overhauling the transmission.

• When the transmission fluid is noticeably dirty or burnt 

(driving under severe conditions).

AC005860

80

DIPSTICK

60

40

(176)

(140)

(104)

FLUID TEMPERATURE [˚C (˚F)]

– 30 (– 1.2)

– 20 (– 0.8)

– 10 (– 0.4)

0 (0)

10 (0.4)

FLUID LEVEL [mm (in)]

AB

AC106828AB