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Section III.   PRINCIPLES OF OPERATION - TM-9-2320-365-10_64
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/.5tonv1-2/TM-9-2320-365-10 Palletized Load System Model M1074/M1075 NSN 2320-01-304-2277 2320-01-304-2278 Manual
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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  N   N  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  7   2, 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 1   1 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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