A partially automated transmission system (100) and method for controlling same is provided. The system includes a manually shifted transmission (10), preferably a compound transmission having a splitter and/or range auxiliary section (14) and a manually shifted main section (12). The main section is shifted by a manual shift lever (57). In a preferred embodiment, the auxiliary section is controlled by an auxiliary section actuator (116) under control from a system ECU (146). A sensor (56) is provided for sensing the position of the shift lever and for providing a signal indicative thereof. A control parameter having a value indicative of the rate of change of shift lever position (d/dt (lever position)) is determined and used as a system control parameter.
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