Automated transmission system power-down

An automated mechanical transmission system including a mechanical transmission having a main section connected in series with a splitter auxiliary section, an electronic control unit for receiving input signals including signals indicative of engaged gear ratio, vehicle speed and system power-down conditions, and for processing same according to predetermined logic rules to issue command output signals to system actuators including an actuator for causing automatic shifting of said splitter section, said system characterized by:

• said electronic control unit including logic effective upon initiation of a system power-down to prevent automatic shifting of said splitter section until at least one of (a) vehicle speed falling below a reference value or (b) a shift into main section neutral is sensed.