The TC-SST (Twin Clutch Sportronic Shift Transmis-
sion) assembly is a twin clutch type automatic M/T
that offers the easy driving similar to A/T, excellent
sport driving, and enhanced fun to drive. The
TC-SST assembly offers the following features.
Good fuel efficiency

• Because the basic structure is the same as M/T, it

is simple and has a high driving force transmis-
sion efficiency.

• Instead of the torque converter, the clutch is used

to transfer the driving force from engine, reducing
the loss of driving force.

• Through the precise joint control with the engine,

the gears can be shifted at the optimum timing.
(With NORMAL mode)

Shift feeling

• Corresponding to the optimization of shift change

timing by the automatic shifting, the shift shock is
reduced, and the shifting is made smooth without
torque loss.

Easy drive

• By adopting TC-SST-ECU, solenoid valve, sen-

sor, valve body, and others, the easy driving simi-
lar to A/T has been achieved.

Sport drive

• Drive mode switching function is equipped which

enables the selection of NORMAL, SPORT, and
S-SPORT (super sport).

Fun to Drive

• The manual mode and the paddle shift are

adopted that allow the driver to shift gears at any
timing.

Starting acceleration

• The clutch and gear shift operation are automati-

cally controlled, reducing the power transfer loss
and achieving the ideal starting acceleration.

TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)

TSB Revision

TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22B-3

SPECIFICATIONS

OVERVIEW

Item

Specifications

Transaxle model

W6DGA

Transaxle type

Forward 6-speed, reverse 1-speed, constant mesh

Clutch

Wet multiplate clutch x 2

Transmission ratio

1st

3.655

2nd

2.368

3rd

1.754

4th

1.322

5th

1.008

6th

0.775

Reverse

4.011

Final reduction ratio

4.062

Helical gear LSD (front differential)

Present

Transfer

Reduction
ratio

3.307

Differential
gear unit

Hydraulic pressure multiplate clutch (ACD)

Transmission oil

Brand

Mitsubishi genuine Dia-Queen SSTF-I

Capacity
dm

7.1 (Including 0.6 in oil cooler)

Transfer oil

Brand

Mitsubishi genuine Dia-Queen LSD Gear Oil

Capacity
dm

0.8

AWC control fluid

Brand

Mitsubishi genuine Dia-Queen ATF SPIII

Capacity
dm

1.0 (Hydraulic pipe section)

AC705560 AC

Shift control lever

Incorporates
valve body and
TC-SST-ECU

Twin clutch (Wet multiple type)

Oil filter

TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)

TSB Revision

TWIN CLUTCH-SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22B-4

DESCRIPTION OF FUNCTION

M2224000200018

The TC-SST assembly offers the following features,
achieving high-performance as well as the easy driv-
ing and sport driving.

SHIFTING MODE

By the operation of shift lever, the automatic mode and manual
mode can be selected.

AC709648

Manual mode

Shift knob

Automatic mode

Mode

Control content

Automatic mode
(Shift lever position:
D)

• Shifting is performed automatically according to the shift map. By the operation of

paddle shift, the mode can be changed to the manual mode. (When the "+" side
lever of paddle shift is pulled for 1 second, the mode returns to the automatic
mode. When the vehicle is stopped, the mode automatically returns to the
automatic mode.)

• In combination with the drive mode, it provides support for the economy driving to

circuit driving.

Manual mode
(Shift lever position:
+/

− side)

• By the operation of shift lever or paddle shift, the driver can change gears at any

timing.

• No automatic shifting is performed during driving, but the selection of 1st gear and

clutch engagement at starting are performed automatically. Also, the gear is
downshifted automatically during deceleration before a stop, and the clutch is
released during stop to achieve the neutral status.

NOTE:

•

Depending on the driving and operation conditions, the shifting may be restricted,
including the prohibition of upshifting to ensure the driving performance and
prohibition of downshifting to prevent the engine over revolution.

•

When the fluid temperature is high, the shifting may be delayed from the operation
in order to protect the TC-SST assembly.

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