Abstract: The invention relates to a modular transmission system for the production of a plurality of modular transmission units that are modified for different applications purposes, comprising a transmission input and a transmission output; a power transmitting element comprising mechanical transmission parts (3; 3.2; 3.3a; 3.3b; 3.3c; 3.3d) that is arranged in a housing part (54) and that forms with the latter a basic transmission module (5; 5.2) that includes at least one input and one output; a control and supply unit (9; 9.2) integrated into the basic transmission module (5; 5.2); a logic unit (8; 8.2) integrated in the basic transmission module (5; 5.2) beneath the theoretical connecting line the input and the output or is flange-mounted in the housing part (54). The logic, control and supply units are arranged beneath the power transmitting element of the basic transmission module (5; 5.2).