In order to increase the top speed of the successful GtL 4/4 local locomotive, it was provided with a carrying axle. It was decided to attach this to the rear end of the locomotive and connect it to the last coupling axle using a Krauss-Helmholtz bogie. The boiler and cylinders remained unchanged compared to the GtL 4/4, but the supplies had been increased. The locomotives were unofficially called GtL 4/5, although according to the Reichsbahn scheme they became the class 9810.
In practice, the trailing axle was not entirely convincing, so the top speed could only be increased from 40 to 45 km/h. When production stopped, 45 had been produced. It was finally decided to equip the GtL 4/4 with a leading axle. The resulting class 9811 could be approved for 55 km/h. 