A dual-clutch powershift transmission for use in a motor vehicle having an
engine and a driveline includes an output shaft adapted for connection to
the driveline, first and second input shafts, a first engine clutch
operable for establishing a releaseable drive connection between the
engine and the first input shaft and a second engine clutch operable for
establishing a releasable drive connection between the engine shaft and
the second input shaft. A first constant-mesh gearset is driven by the
first input shaft. A second constant-mesh gearset is driven by the second
input shaft. A first shift clutch releasably engages the first gearset to
establish a drive connection between the first input shaft and the output
shaft. A second shift clutch releasably engages the second gearset to
establish a drive connection between the second input shaft and the
output shaft.