TM-9-2320-366-10-1 MTV Operator Manual M1083 Series - Volume 1 Download
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TM 9-2320-366-10-1 Figure 1-19. Powertrain (Cont) b. Transmission. The vehicle is equipped with a fully automatic, electronically con- trolled, seven-speed close-ratio Allison transmission Model MD3070PT (2, Figure 1-19). WTEC II Transmission ECU Pushbutton Shift Selector (TEPSS) has a velcro cover, 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 (N) range. (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. 1-51