Mazda Training manual — part 34

Powertrain Transmissions

•

The three shaft design with one input shaft and two output shafts allows for a more
compact construction, since each output shaft only carries three or four gears.

•

As a result of this construction there are two different final gear ratios available, i.e. one
for the first to fourth gear and another one for the fifth, sixth and reverse gear.

L1001.4_02003

1

Differential

3

Output shaft no. 2

2

Output shaft no. 1

4

Input shaft

Curriculum Training

02-7

Transmissions Powertrain

S15M(X)-D Transmission

•

The S15M(X)-D is a three-shaft (coaxial arranged) five-speed MT, which is directly
operated by the shift lever.

•

The S15M-D transmission is fitted in the RWD version of the Mazda BT-50, while the
S15MX-D transmission with bolted-on transfer case is fitted in the 4WD version.

NOTE: When replacing or refilling the transmission oil and/or the separate transfer oil only

use the specified MTF (Manual Transmission Fluid) “Type A” (refer to the workshop
manual for details).

Overview

L1001.4_02006

1

Output shaft

4

Counter shaft

2

Extension housing (S15M-D)

5

Input shaft

3

Transfer case (S15MX-D)

02-8 Curriculum

Training

Powertrain Transmissions

Automated Shift Manual Transmission

•

The automated shift manual transmission is based on the two-shaft five-speed MTX iB5.
Compared to the cable operated version of the iB5 transmission the automated shift
manual transmission features a bolted-on shift actuator, and a separate clutch actuator
with integrated TCM (Transmission Control Module). Depending on the signals from the
TCM the clutch actuator operates the clutch via the clutch slave cylinder, and the shift
actuator performs the gearshifts accordingly.

•

The automated shift manual transmission is only fitted in the Mazda2 (DY) models with
1.4 MZI engine.

Overview

L1001.4_02011

1

Clutch actuator with integrated TCM

3

Clutch slave cylinder

2 Shift

actuator

Curriculum Training

02-9

Transmissions Powertrain

Service Procedures

Bleeding the Clutch System

•

The hydraulic fluid of the clutch system should be replaced every two years, together
with the hydraulic fluid of the brake system. Since the clutch system can only be bled in
a certain position of the clutch master cylinder, the clutch actuator first needs to be
driven to this position with the aid of M-MDS. To perform the procedure select the option
Toolbox

Æ PowertrainÆASM Service FunctionsÆShift Actuator Bleed and follow

the instructions of M-MDS.

02-10 Curriculum

Training