Mitsubishi Lancer Evolution 8. Manual — part 8
POWER TRAIN – MANUAL TRANSMISSION
2-11
Reverse Gear protection when changing into 5
th
or 6
th
gear
The lock moves against the base bracket when shifting to 5
th
or 6
th
gear,
thus preventing a change into reverse.
When engaging reverse
Reverse can be engaged by pulling up the collar beneath the gear knob
Engaging to
5
th
gear
Engaging to
6
th
gear
Lock
Base bracket
Engaging reverse
Lift the collar
Lock
Base bracket
POWER TRAIN – ACD AND AYC
2-12
Active Centre Differential (ACD) and Active Yaw Control (AYC)
General information
The following has been changed with the new additions to the Lancer Evolution-VIII.
• Super AYC has been adopted in the rear differential (refer to P. 2-14).
• Only one position in line with the adoption of Super AYC.
Electronic control system
4WD-ECU
The 4WD-ECU ABS monitor terminal No. 49 has changed to No. 48 in line with the adoption of Super AYC.
Other terminal numbers are the same as for the Lancer Evolution-VII. However, if the 4WD-ECU for the Lancer Evolution-VII is
mounted in the Lancer Evolution-VIII, it becomes AYC control defect, and Diagnosis Code No. 65 appears 60 seconds after
Ignition is switched ON and the ACD and AYC systems stop. (the same applies if the 4WD-ECU for the Lancer Evolution-VIII is
mounted in the Lancer Evolution-VII)
POWER TRAIN – PROPELLER SHAFT, FRONT AXLE AND REAR AXLE 2-13
Propeller Shaft
The specifications of the propeller shaft have changed as follows for the 6M/T mounting.
Specifications
Item
New 6M/T
New and old 5M/T
Universal joint
Journal diameter mm
18.3
16.3
Front Axle
EBJ has been adopted in the drive shaft wheel constant velocity joints.
Specifications
Item
New
Old
Wheel
EBJ
*1
BJ
Joint type
Transmission
TJ
LH
352.5 x 26
350 x 26
Drive shaft
Shaft length
*2
x Shaft
diameter mm
RH
429.5 x 26
427 x 26
Notes
*1: EBJ: by adopting 8 reduced diameter balls, the velocity joints weigh less and are more compact than
the original BJ
*2: The location of the central point of each joint is shown.
Rear axle
EBJ has been adopted in the drive shaft wheel constant velocity joints.
Specifications
New
Old
Item
AYC not
mounted
AYC
mounted
AYC not
mounted
AYC
mounted
Wheel
EBJ
*1
BJ
Joint type
Trans-
mission
TJ
TJ
LH
485.6 x 25
428.5 x 25
483 x 25
426 x 25
Drive
shaft
Shaft length
*2
x
Shaft diameter
mm
RH
575.5 x 25
448.5 x 25
573 x 25
446 x 25
Notes
*1: EBJ: by adopting 8 reduced diameter balls, the velocity joints weigh less and are more compact than
the original BJ
*2: The location of the central point of each joint is shown.
Propeller Shaft
Front Axle
Rear Axle
the original BJ
POWER TRAIN – DIFFERENTIAL
2-14
Differential
The differential has changed as follows.
• Optimisation and weight saving of the differential carrier wall thickness (RS)
• Installation of super AYC (standard for GSR; optional for RS)
Super AYC
The performance in track competitions such as rally cross and circuit races has improved significantly with AYC, where the
torque differential has increased by 1.6 compared to the original by changing the design of the AYC torque transfer differential.
It is has the following features.
• Turning characteristics: The yaw has increased because of the increased torque differential between the right and left
wheels. The turn-in has improved further and understeer is reduced.
• Traction performance: Improved performance (LSD effect) on a wide range of road conditions
• The original case-to-shaft system (system of transmitting torque between the differential case and the right axle) has been
changed to a shaft-to-shaft system in order to increase the amount of torque movement.
• The differential mechanism has changed from bevel gear to a planetary gear type in order to operate the shaft-to-shaft
system.
Construction Diagram
New: Super AYC (shaft-to-shaft system)
Old: AYC (case-to-shaft system)
Differential
mechanism
planetary
gear system
Input axle
Fluctuating speed gear
Set of 2 clutches
Differential
mechanism
bevel gear
system
Fluctuating
speed gear
Input axle
Left
axle
Right
axle
Left
axle
Right
axle
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