Dual clutch group transmission shifttable under load

A load-shiftable group transmission having at least first and second input constants (E1, E2) and a dual clutch (1) which comprises first and second individual clutches (K1, K2) providing a first power path from the first individual clutch (K1) via a direct forward gear stage (V15 of a shifting program) to a main shaft (10), with fore and after forward gear stages (V14 and V16) disposed in the shifting program directly adjacent to the direct gear stage (V15) with a power path extending via the second individual clutch (K2) and a countershaft (14), a hollow shaft (96) arranged concentrically with respect to the countershaft (14) and supporting at least first and second countershaft gearwheels (88, 13) of which the first countershaft gearwheel (88) belongs to the second input constant (E2), and a first clutch gearwheel (8) arranged closest to the dual clutch (1) belongs to the first input constant (E1), the power path of the after gear stage (V16) extending from the second individual clutch (K2) via the first input constant (E1), the second input constant (E2) and the main shaft (10) which is rotationally fixedly coupled to a second gearwheel (9) of the second input constant (E2), the hollow shaft (96) including a first shift element (S1) for rotationally coupling and decoupling the second input constant (E2) from the hollow shaft (96).