The invention relates to a transmission module (17) for a transmission system. The module comprises a transmission device (35) with a transmission device shell (36) and at least one swash-plate machine (1) each with a shell (4). The at least one swash-plate machine (1) is fixed on the transmission device (35). The transmission device shell (36) and the at least one shell (4) are at least partially integrated by means of at least one connecting shell part (43), so that the at least one connecting shell part (43) at least partially forms the transmission device shell (36) and at least partially forms the shell (4) of the swash-plate machine (1).