TM-9-2320-365-10
M1078 SERIES, 2-1/2 TON, 4x4, LIGHT MEDIUM TACTICAL VEHICLES (LMTV)
OPERATOR'S INSTRUCTIONS MANUAL
AUGUST 2005
CHANGE 2
TM-9-2320-365-10 - Page 70 of 836
TM 9-2320-365-10
1-14. POWERTRAIN (CONT)
Figure 1-9. Powertrain (Cont)
b. Transmission.
The vehicle is equipped with a fully automatic, electronically controlled,
seven-speed close-ratio Allison transmission Model MD3070PT (2, Figure 1-9).
The
WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) has a velcro cover and the
WTEC III Transmission Pushbutton Shift Selector (TPSS) does not have a velcro cover.
(1) The WTEC II TEPSS (7) or WTEC III TPSS (7) is located in the instrument panel,
to the Operator’s left.
(2) The transmission defaults to Neutral (
N
) whenever electrical power is removed from
the vehicle. When electrical power is first supplied to the vehicle, the WTEC II TEPSS
or WTEC III TPSS will momentarily display
MODE ON
in the LED display.
MODE ON
display will disappear and
NN
will be left in the LED display. This lets you know that
the transmission is in highway mode and Neutral range (
N
).
(3) The Drive (
D
) gear selection is used for normal driving conditions. The transmission
will engage 2nd gear when
D
is selected and the vehicle is stopped. The LED display
will illuminate
72
, indicating that the transmission is in 2nd gear and there are seven
forward gears available. Low gear (1st gear), is available only through manual selection
by pressing the down arrow button until
11
is displayed in the LED display. You may
manually downshift or upshift to a lower or higher gear range as required. However, the
transmission will not downshift to a lower gear if the engine speed is too high for the
gear selected. Selecting a specific gear; for example, 3rd; will prevent the transmission
upshifting past the selected gear.
1-32
Change 1
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