Mitsubishi Galant (2004+). Manual - part 613

GENERAL DESCRIPTION

TSB Revision

AUTOMATIC TRANSAXLE

23A-3

GENERAL DESCRIPTION

M1231000100366

F4A4B and F4A5A models have been established.

ITEM

SPECIFICATION

Transaxle model

F4A4B-4-L1Z

F4A5A-4-F1Z

Engine model

4G69-MPI-MIVEC

6G75-MPI

Torque converter

Type

3-element, 1-stage, 2-phase type

Lock-up

Provided

Stall torque ratio

2.0

1.7

Transaxle type

4 forward speeds, 1 reverse speed, fully automatic

Transaxle gear ratio

1st

2.842

2.842

2nd

1.573

1.576

3rd

1.000

1.000

4th

0.688

0.686

Reverse

2.214

2.193

Final reduction ratio (Differential gear ratio) 4.212

3.728

Clutch

Multi-disc type 3 sets

Brake

Multi-disc type 2 sets

Manual control system

P-R-N-D-3-2-L (7 positions)

P-R-N-D (4 position) + Sport 
mode (up, down)

Shift pattern control

Electronic control

Hydraulic control during shifting

Electronic control (Each clutch hydraulically independently 
controlled)

Torque converter clutch control

Electronic control

Transmission fluid

Specified lubricants

DIAMOND ATF SP III

Quantity dm

3

 (qt)

7.7 (8.1)

8.4 (8.9)

GENERAL DESCRIPTION

TSB Revision

AUTOMATIC TRANSAXLE

23A-4

TRANSAXLE

The transaxle is made up of the torque converter and gear train. A 3-element, 1-stage, 2-phase torque con-
verter with built-in torque converter clutch is used. The gear train is made up of four sets of multi-disc 
clutches, two sets of multi-plate brakes, one set of one-way clutches and two sets of planetary gears. The 
planetary gears are made up of sun gears, carriers, pinion gears and annulus gears.

.

TRANSAXLE CONFIGURATION DRAWING

.

COMPONENTS AND FUNCTIONS

FUNCTION ELEMENT TABLE

×: Function element     −: Not applicable
NOTE: * operates only when the vehicle is stationary [at approximately 10 km/h (6.2 mph) or less].

AC001813

OD

REV

2ND LR

OWC

UD

AB

COMPONENT

FUNCTION

Underdrive clutch

UD

connects the input shaft to the underdrive sun gear.

Reverse clutch

REV

connects the input shaft to the reverse sun gear.

Overdrive clutch

OD

connects the input shaft to the overdrive planetary carrier.

Low-reverse brake

LR

holds the low-reverse annulus gear and the overdrive planetary 
carrier.

Second brake

2ND

holds the reverse sun gear.

One-way clutch

OWC

restricts the rotation direction of the low-reverse annulus gear.

OPERATING ELEMENT

ENGINE START PARKING 

MECHANISM

UNDERDRIVE 
CLUTCH (UD)

REVERSE 
CLUTCH (REV)

OVER-DRIVE 
CLUTCH (OD)

LOW-REVERSE 
BRAKE (LR)

SECOND 
BRAKE (2ND)

TRANSMISSION RANGE

P

Parking

OK

×

−

−

−

×

−

R

Reverse

−

−

−

×

−

×

−

N

Neutral

OK

−

−

−

−

×

−

Sport 
mode

1st

−

−

×

−

−

×*

−

2nd

−

−

×

−

−

−

×

3rd

−

−

×

−

×

−

−

4th

−

−

−

−

×

−

×

GENERAL DESCRIPTION

TSB Revision

AUTOMATIC TRANSAXLE

23A-5

SECTIONAL VIEW <F4A4B>

AC305544AC

1

4

3

2

5

6 7

8

9

19

11

12

13

14

15

16

17

18

10

1. OVERDRIVE 

CLUTCH

2. REVERSE 

CLUTCH

3.  OVERDRIVE PLANETARY CARRIER
4. SECOND 

BRAKE

5. LOW-REVERSE 

BRAKE

6. OUTPUT 

PLANETARY 

CARRIER

7. ONE-WAY 

CLUTCH

8.  TRANSFER DRIVE GEAR
9. UNDERDRIVE 

CLUTCH

10. TRANSAXLE CASE

11. TORQUE CONVERTER
12.  TORQUE CONVERTER CLUTCH
13. INPUT SHAFT
14. OIL PUMP
15.  TORQUE CONVERTER HOUSING
16. DIFFERENTIAL
17. TRANSFER DRIVEN GEAR
18. OUTPUT SHAFT
19. REAR COVER

GENERAL DESCRIPTION

TSB Revision

AUTOMATIC TRANSAXLE

23A-6

SECTIONAL VIEW <F4A5A>

AC211841AC

1

2

3

4

5

6

7 8

9

19

11

12

13

14

15

16

17

18

10

1. OVERDRIVE 

CLUTCH

2. REVERSE 

CLUTCH

3.  OVERDRIVE PLANETARY CARRIER
4. SECOND 

BRAKE

5. LOW-REVERSE 

BRAKE

6. OUTPUT 

PLANETARY 

CARRIER

7. ONE-WAY 

CLUTCH

8.  TRANSFER DRIVE GEAR
9. UNDERDRIVE 

CLUTCH

10. TRANSAXLE CASE

11. TORQUE CONVERTER
12.  TORQUE CONVERTER CLUTCH
13. INPUT SHAFT
14. OIL PUMP
15.  TORQUE CONVERTER HOUSING
16. DIFFERENTIAL
17. TRANSFER DRIVEN GEAR
18. OUTPUT SHAFT
19. REAR COVER