Mitsubishi Galant 9G. Manual - part 572

ON-VEHICLE SERVICE

TSB Revision

AUTOMATIC TRANSAXLE

23A-366

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 
scan 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. Tran-
saxle overhaul and cooler line flushing may be necessary.

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 transaxle 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 transaxle 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 transaxle.

•

When overhauling the transaxle.

•

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

ON-VEHICLE SERVICE

TSB Revision

AUTOMATIC TRANSAXLE

23A-367

TRANSMISSION FLUID CHANGE

M1231021500057

If you have an transmission fluid changer, use this changer to 
replace the transmission fluid. If you do not have an transmis-
sion fluid changer, replace the transmission fluid by the follow-
ing procedure.
1. Disconnect the hose shown in the illustration which 

connects the transaxle and the oil cooler (inside the 
radiator). Place a container under the hose to collect the 
discharge.

CAUTION

The engine should be stopped within one minute after it is 
started. If all the transmission fluid has drained out before 
then, the engine should be stopped at that point.
2. Start the engine and let the transmission fluid drain out.

(Running conditions: "N" range with engine idling)

Approximately 3.5 dm

3

 (3.7 quarts) of transmission 

fluid should be removed.

3. Remove the drain plug from the bottom of the transaxle case 

to drain the transmission fluid.

Approximately 2.0 dm

3

 (2.1 quarts) of transmission 

fluid should be removed.

4. Install the drain plug with a new gasket, and tighten it to the 

specified torque.

Tightening torque: 32 

± 2 N⋅m (23 ± 2 ft-lb)

CAUTION

Stop pouring if the full volume of transmission fluid can 
not be added.
5. Add new transmission fluid (DIAMOND ATF SP III) through 

the oil filter tube.

Approximately 5.5 dm

3

 (5.8 quarts) of transmission 

fluid should be added.

6. Repeat the procedure in Step 2. (to pump out the rest of the 

contaminated transmission fluid)

7. Add new transmission fluid (DIAMOND ATF SP III) through 

the oil filter tube.

Approximately 3.5 dm

3

 (3.7 quarts) of transmission 

fluid should be added.

NOTE: Check for contamination or a burnt odor. If the trans-
mission fluid is still contaminated or burnt, repeat Steps 6 
and 7 before proceeding to Step 8.

AC306226

<F4A4B>

DIPSTICK

AB

AC210671

<F4A5A>

AC

DIPSTICK

TRANSMISSION
RANGE SWITCH

AC306236

AB

CENTERMEMBER

<F4A4B>

AC206984AC

CENTERMEMBER

<F4A5A>

ON-VEHICLE SERVICE

TSB Revision

AUTOMATIC TRANSAXLE

23A-368

8. Reconnect the hose which was disconnected in step 1 

above, and firmly replace the dipstick.

9. Start the engine and run it at idle for one to two minutes.
10.Move the selector lever through all positions, and then move 

it to the "N" position.

11.Check that the transmission fluid level is at the "COLD" 

mark on the dipstick. If the level is less than this, add 
transmission fluid.

12.Drive the vehicle until the transmission fluid temperature 

rises to the normal operating temperature [70 

− 80°C (158 − 

176

°F)], and then check the transmission fluid level again. 

The transmission fluid level must be at the "HOT" mark.
NOTE: The transmission fluid temperature is measured with 
scan tool MB991958 (MUT-III sub assembly).
NOTE: The "COLD" level is for reference only; the "HOT" 
level should be regarded as the standard level.
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.

13.When the transmission fluid is less than the specified level, 

add transmission fluid.
When the transmission fluid is greater than the specified 
level, drain the excess fluid through the drain plug to adjust 
the transmission fluid to the specified level.

14.Firmly insert the dipstick into the oil filler tube.

AC306226

<F4A4B>

DIPSTICK

AB

AC210671

<F4A5A>

AC

DIPSTICK

TRANSMISSION
RANGE SWITCH

AC106828AB

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

ON-VEHICLE SERVICE

TSB Revision

AUTOMATIC TRANSAXLE

23A-369

FLUSHING COOLERS AND TUBES

M1231013000444

Required Special Tool:
MB995062: Flushing Tool

WARNING

•

Wear protective eyewear that meets the require-
ments of ANSI Z87.1 

−

 1968 and OSHA. Wear stan-

dard  industrial rubber gloves.

•

Keep lighted cigarettes, sparks, flames, and other 
ignition sources away from the area to prevent the 
ignition of combustible liquids and gases. Keep a 
class B fire extinguisher in the area where the 
flushing tool will be used. Keep the area well venti-
lated. Do not let flushing solvent come in contact 
with eyes or skin. If it does, flush with water for 15 
to 20 seconds. Remove contaminated clothing and 
wash affected skin with soap and water. Seek med-
ical attention.

When a transaxle failure has contaminated the transmission 
fluid, the oil cooler(s) must be flushed. The cooler by-pass 
valve in the transaxle must also be replaced. The torque con-
verter must also be replaced with an exchange unit. This will 
ensure that metal particles or sludged transmission fluid are not 
later transferred back into the reconditioned (or replaced) tran-
saxle. There are two different procedures for flushing coolers 
and lines. The recommended procedure is to use special tool 
MB995062 Flushing Tool. The other procedure is to use a hand 
suction gun and mineral spirits.
1. Remove the cover plate filler plug on special tool 

MB995062. Fill the reservoir 1/2 to 3/4 full with fresh flushing 
solution. Flushing solvents are petroleum based solutions 
generally used to clean transaxle components. Do not use 
solvents containing acids, water, gasoline, or any other 
corrosive liquids.

2. Reinstall the filler plug on special tool MB995062.
3. Verify that the pump power switch is turned "OFF." Connect 

the red alligator clip to the positive battery terminal. Connect 
the black alligator clip to a good ground.

4. Disconnect the cooler lines at the transaxle.

NOTE: When flushing the transaxle cooler and lines, always 
reverse flush.