Dual clutch transmission with an input shaft; two couplings (3.1, 3.2) for the rotationally fixed connection of the input shaft with one partial transmission input shaft (4, 5) each; two countershafts (6, 8), each with an output gear (7, 9) arranged coaxially thereto; first, second, and third forward gear idlers (15, 17, 18), each arranged coaxially to one of the countershafts (6, 8); fourth and fifth forward gear idlers (20, 23), each arranged coaxially to the other of the countershafts (8, 6); wherein a first output gear of the output gears (7, 9) is designed as a larger output gear which has a larger diameter and/or a greater number of teeth than a smaller second output gear of the output gears (7, 9), the first forward gear idler is used to form a second gear stage, the second forward gear idler is used to form a third gear stage, the third forward gear idler is used to form a fourth gear stage, the fourth forward gear idler is used to form a fifth gear stage, and the fifth forward gear idler is used to form a sixth gear stage, wherein the gear stages in the order mentioned have a decreasing ratio, wherein the larger first output gear is designed as an idler which can be connected in a rotationally fixed manner to the associated countershaft via a switching element, wherein the smaller second output gear is designed as a fixed gear which is rotationally fixedly connected to its countershaft, wherein the second gear stage, the third gear stage, and the fourth gear stage each take place with an output via the smaller second output gear, and the fifth gear stage and the sixth gear stage each take place with an output via the larger first output gear, wherein a reverse gear idler is arranged on the countershaft with the larger output gear and rotatably on a hub of the larger output gear, characterized in that the reverse gear idler meshes only with the first forward gear idler. an input shaft; two couplings (3.1, 3.2) for the rotationally fixed connection of the input shaft with one partial transmission input shaft (4, 5) each; two countershafts (6, 8), each with an output gear (7, 9) arranged coaxially thereto; first, second, and third forward gear idlers (15, 17, 18), each arranged coaxially to one of the countershafts (6, 8); fourth and fifth forward gear idlers (20, 23), each arranged coaxially to the other of the countershafts (8, 6); wherein a first output gear of the output gears (7, 9) is designed as a larger output gear which has a larger diameter and/or a greater number of teeth than a smaller second output gear of the output gears (7, 9), the first forward gear idler is used to form a second gear stage, the second forward gear idler is used to form a third gear stage, the third forward gear idler is used to form a fourth gear stage, the fourth forward gear idler is used to form a fifth gear stage, and the fifth forward gear idler is used to form a sixth gear stage, wherein the gear stages in the order mentioned have a decreasing ratio, wherein the larger first output gear is designed as an idler which can be connected in a rotationally fixed manner to the associated countershaft via a switching element, wherein the smaller second output gear is designed as a fixed gear which is rotationally fixedly connected to its countershaft, wherein the second gear stage, the third gear stage, and the fourth gear stage each take place with an output via the smaller second output gear, and the fifth gear stage and the sixth gear stage each take place with an output via the larger first output gear, wherein a reverse gear idler is arranged on the countershaft with the larger output gear and rotatably on a hub of the larger output gear, characterized in that the reverse gear idler meshes only with the first forward gear idler.