MITSUBISHI 380 2005 Workshop Manual

AUTOMATIC TRANSMISSION23A-2
SPECIAL TOOLS . . . . . . . . . . . . . . . .23A-286
ON-VEHICLE SERVICE. . . . . . . . . . .23A-289
A/T CONTROL COMPONENT LAYOUT . . 23A-289
ESSENTIAL SERVICE . . . . . . . . . . . . . . . . 23A-291
TRANSMISSION FLUID CHECK . . . . . . . . 23A-291
TRANSMISSION FLUID CHANGE . . . . . . . 23A-292
OIL COOLER FLOW CHECK . . . . . . . . . . . 23A-294
TRANSMISSION RANGE SWITCH
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-294
TRANSMISSION RANGE SWITCH AND
CONTROL CABLE ADJUSTMENT. . . . . . . 23A-294
AUTOMATIC TRANSMISSION CONTROL
COMPONENT CHECK . . . . . . . . . . . . . . . . 23A-295
CRANKSHAFT POSITION SENSOR
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-295
TRANSMISSION FLUID TEMPERATURE
SENSOR CHECK . . . . . . . . . . . . . . . . . . . . 23A-296
TRANSMISSION RANGE SWITCH
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-296
STOPLIGHT SWITCH CHECK . . . . . . . . . . 23A-296
A/T CONTROL RELAY CHECK . . . . . . . . . 23A-296
SOLENOID VALVE CHECK . . . . . . . . . . . . 23A-298SELECTOR LEVER OPERATION
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23A-299
TRANSMISSION CONTROL CABLE
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . 23A-299
TRANSMISSION CONTROL* . . . . . . .23A-300
REMOVAL AND INSTALLATION . . . . . . . . 23A-300
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 23A-301
DISASSEMBLY AND ASSEMBLY . . . . . . . 23A-302
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 23A-303
TRANSMISSION ASSEMBLY . . . . . .23A-304
REMOVAL AND INSTALLATION . . . . . . . . 23A-304
TRANSMISSION FLUID COOLER,
HOSE AND PIPE . . . . . . . . . . . . . . . .23A-312
REMOVAL AND INSTALLATION . . . . . . . . 23A-312
SPECIFICATIONS . . . . . . . . . . . . . . .23A-313
FASTENER TIGHTENING
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 23A-313
SERVICE SPECIFICATIONS . . . . . . . . . . . 23A-313
LUBRICANT . . . . . . . . . . . . . . . . . . . . . . . . 23A-314

GENERAL DESCRIPTION
AUTOMATIC TRANSMISSION23A-3
GENERAL DESCRIPTIONM1231000100366
ITEM SPECIFICATION
Transmission modelF5A5A-4-C5Z
Engine model 6G75-S4-MP
Torque converter Type 3-element, 1-stage, 2-phase type
Lock-up Provided
Stall torque ratio 1.71
Transmission type5 forward speeds, 1 reverse speed, fully automatic
Transmission gear
ratio1st 3.789
2nd 2.162
3rd 1.421
4th 1.000
5th 0.686
Reverse 3.117
Final reduction ratio (Differential gear ratio) 3.325
Clutch Multi-disc type 4 sets
Brake Multi-disc type 2 sets, band type 1 set
Manual control system 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 MITSUBISHI ELC4-SP III
Quantity (litres) 8.4

GENERAL DESCRIPTION
AUTOMATIC TRANSMISSION23A-4
TRANSMISSION
The transmission is made up of the torque converter and gear train. A 3-element, 1-stage, 2-phase torque
converter 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 band type brake, two set of one-way clutches and three sets of
planetary gears. The planetary gears are made up of sun gears, carriers, pinion gears and annulus gears.
.
TRANSMISSION CONFIGURATION DRAWING
.
COMPONENTS AND FUNCTIONS
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.
Direct clutch DIR connects the direct sun gear and direct 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.
Reduction brake RED locks the direct sun gear.
One-way clutch(DIR) OWC-D restricts the rotation direction of the direct sun gear.
One-way clutch(LR) OWC-LR restricts the rotation direction of the low-reverse annulus gear.

GENERAL DESCRIPTION
AUTOMATIC TRANSMISSION23A-5
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].
OPERATING
ELEMENTSTART PARKING
MECHANI
SMUNDER
DRIVE
CLUTCH
(UD)REVERSE
CLUTCH
(REV)OVER-
DRIVE
CLUTCH
(OD)DIRECT
CLUTCH
(DIR)LOW-
REVERSE
BRAKE
(LR)SECOND
BRAKE
(2ND)REDUCTI-
ON
BRAKE
(RB) TRANSMISSION
RANGE
POK
R
NOK
Sport
mode1st*
2nd
3rd
4th
5th

GENERAL DESCRIPTION
AUTOMATIC TRANSMISSION23A-6
SECTIONAL VIEW
1. OVERDRIVE CLUTCH
2. REVERSE CLUTCH
3. OVERDRIVE PLANETARY CARRIER
4. OUTPUT PLANETARY CARRIER
5. SECOND BRAKE
6. LOW-REVERSE BRAKE
7. ONE-WAY CLUTCH
8. TRANSFER DRIVE GEAR
9. TRANSMISSION CASE
10. UNDERDRIVE CLUTCH
11. OIL PUMP
12. TORQUE CONVERTER HOUSING13. TORQUE CONVERTER CLUTCH
14. TORQUE CONVERTER
15. INPUT SHAFT
16. DIFFERENTIAL
17. REAR COVER
18. OUTPUT SHAFT
19. DIRECT CLUTCH
20. REDUCTION BRAKE BAND
21. DIRECT PLANETARY CARRIER
22. TRANSFER DRIVEN GEAR
23. OUTPUT GEAR
24. DIFFERENTIAL DRIVE GEAR

GENERAL DESCRIPTION
AUTOMATIC TRANSMISSION23A-7
ELECTRONICALLY-CONTROLLED SYSTEM
.
INVECS-II
When in drive ("D" range), the new automatic transmission
employs an innovative shift schedule to provide a high level
of comfort and "easy driving style" that matches all driving
conditions as well as the driver's driving style.
INVECS-II features "Optimum Shift Control," which provides
shift timing the average driver perceives to be the optimum
timing under any road conditions. "Adaptive Shift Control"
adjusts shift timing to match the driving habits and prefer-
ences of individual drivers.
.
INVECS-II Sports Mode Automatic Transmission
A further development of the INVECS-II automatic transmis-
sion, incorporating a sports mode that enables quasi-manual
gear shifts. When the gear shift lever is pushed sideways fronm
the "D" position to the sports mode position, the driver can use
it to make gear selections manually. The sports mode has the
following features.
In contrast to the automatic "D" range, the sports mode
does not perform automatic upshifts. Thus, the engine can
be driven fully into its red zone.
For more rapid gear shifting, it is possible to shift directly
from 4th gear to 2nd gear, therby skipping a gear.
When the vehicle decelerates and stops, the system auto-
maticaly shifts down to 1st gear for conveinience when the
vehicle starts moving again. Further, 2nd gear can be
selected with the vehicle stationary, so standing starts can
be made in 2nd gear on slippery surfaces.
.

GENERAL DESCRIPTION
AUTOMATIC TRANSMISSION23A-8
FEATURES
OPTIMUM SHIFT CONTROL
1. The shift patterns found satisfying by the typical driver for all
ranges of driving are stored in the computer's memory. The
computer uses this data to analyze road conditions and the
driver's style of operation, and then outputs the optimal shift
patterns stored in its memory to best match the conditions.
2. We introduce the latest control technologies with an innova-
tive new algorithm called the "neural network" that works to
imitate the decision-making processes of the human brain.
The neural network links a wide variety of input data regard-
ing road and operating conditions, and instantly makes
accurate shift control decisions.
.
ADAPTIVE SHIFT CONTROL
1. The computer learns the driving habits and pref-
erences of each individual driver by processing
driving data on engine output, tyre load, foot
brake operation, etc. It then uses this data to
adjust shift timing to best suit the driver's style.2. If the computer determines from the driving pat-
terns that the driver is one who enjoys a relaxed,
unhurried style, it adjusts timing to execute
up-shifts at a lower engine speed to provide a
smooth, quiet ride. On the other hand, if the com-
puter determines the driver to prefer a sporty ride,
it adjusts timing to shift up at a higher engine
speed to provide more powerful response.
.

GENERAL DESCRIPTION
AUTOMATIC TRANSMISSION23A-9
SYSTEM CONSTRUCTION DIAGRAM

GENERAL DESCRIPTION
AUTOMATIC TRANSMISSION23A-10
SHIFT PATTERN CONTROL.
UPSHIFT PATTERN
.
DOWNSHIFT PATTERN
NOTE: INVECS does not function on downshift.

GENERAL DESCRIPTION
AUTOMATIC TRANSMISSION23A-11
TORQUE CONVERTER CLUTCH CONTROL.
5TH GEAR RANGE
.
4TH GEAR RANGE