Mitsubishi Lancer Evolution 8. Manual — part 5
ENGINE (4G6) – EMISSION CONTROL SYSTEM
1-13
Emission Control System
The following change has been made based on the 4G63-DOHC-Turbocharger engine used in the original Lancer Evolution-
VII.
• The EGR system has been discontinued.
Emission Control System Diagram
From fuel tank
Check
valve
Vacuum tank
Fuel pressure control
solenoid valve
Purge control
solenoid
valve
Fuel pressure
regulator
From fuel
pump
Oxygen
sensor
To fuel
tank
PCV valve
Injector
Catalytic converter
Air
inlet
Canister
ENGINE (4G6) – MOUNTING
1-14
Mounting
The shape of the transmission mounting has been changed for the new 6-speed manual transmission.
Construction diagram
Transmission mounting
New
Old
2-1
SECTION 2
CONTENTS
Manual transmission . . . . . . . ..2-2
General information . . . . . . . . . . ...2-2
Description of structure and operations
(6-speed manual transmission) . . . . . . 2-4
Transmission control . . . . . . . . . . ..2-9
Active Centre Differential (ACD) and
Active Yaw Control (AYC) . . . . . 2-12
General information . . . . . . . . . . .2-12
Electronic control system . . . . . . . . .2-12
Propeller Shaft . . . . . . . . . ..2-13
Front Axle . . . . . . . . . . . ..2-13
Rear Axle . . . . . . . . . . . ...2-13
Differential . . . . . . . . . . . .2-14
POWER TRAIN – MANUAL TRANSMISSION
2-2
Manual Transmission
General Information
• In accordance with the new additions to the Lancer Evolution-VIII, both the newly developed 6-speed transmission (W6MAA
type) and the original 5-speed transmission (W5M51 type) can be installed.
• The W6MAA type transmission (6-speed manual gearbox) is mounted in the GSR, and the W5M51 type (5-speed manual
gearbox) transmission and the W6MAA type transmission (6-speed manual gearbox) are mounted in the RS.
• The W6MAA type transmission (6-speed manual gearbox) enhances acceleration and high-speed performance by using a 6-
speed close ratio gearbox, and can handle a wide range of driving conditions.
• The W5M51 type transmission (5-speed manual gearbox) is basically the same as the super-close-ratio specification
mounted on the original Lancer Evolution-VII (RS).
• As well as 5- and 6-speed manual gearbox options, The transmission includes Active Centre Differential (ACD) and helical
gear LSD as standard equipment.
Specifications
Items
Specifications
New
Old
Classification
GSR/RS
RS
GSR
RS (super-
close gear)
Transmission type
W6MAA
W5M51
Engine type
4G63-DOHC-
T/C
Transmission type
6 steps
forward, 1 step
reverse,
always in
contact
6 steps
forward, 1 step
reverse,
always in
contact
1
st
2.909
2.785
2.928
2.785
2
nd
1.944
1.950
3
rd
1.434
1.444
1.407
1.444
4
th
1.100
1.096
1.031
1.096
5
th
0.868
0.825
0.720
0.825
6
th
0.693
-
Gear ratios
Reverse
2.707
3.416
Final reduction gear
4.583
4.529
Helical gear LSD (front
differential)
No
Reduction
Gear
3,307
Transfer
Limited slip
differential
Hydraulic
multiplate
clutch (ACD)
VCU or
Hydraulic
multiplate
clutch (ACD)
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