In automatic transmissions of modern motor vehicles, the transmission control modules are in many cases arranged within the automatic transmission. In order to electrically conductively connect these transmission control modules to electrical connection lines for voltage supply, to signal lines and to bus lines, electrical lines are guided from the transmission control module to an electrical plug-type connector, which is arranged in a through-hole in a transmission housing surrounding the automatic transmission. The transmission housing delimits an interior space filled with automatic transmission oil from an exterior space surrounding the automatic transmission. The electrical plug-type connector can be electrically contacted from the exterior space by means of an electrical mating plug-type connector. The electrical plug-type connector arranged in the through-hole is formed in such a way that no fluid can pass from the interior space to the exterior space. In this case, the plug housing is sealed on its outer wall with respect to the transmission housing, generally by means of an elastomer ring seal. Electrical plug-type contacts are generally arranged in the plug housing of the electrical plug-type connector and protrude from the exterior space into the interior space. These plug-type contacts are sealed with respect to the plug housing fabricated from plastic. This can be achieved for example in that the plug-type contacts have specifically shaped surface profiles, such as a fir-tree profile, in the region with which the plug-type contacts are connected to the plug housing. It is also known to form the seal using O-rings, which are fitted to each plug-type contact. Furthermore, seals by casting, for example with polyurethane, epoxy resin, silicones or similar materials, are known.
It has been found however that, after a few temperature changes within the automatic transmission, wherein the temperature fluctuations may be between −40° C. and +150° C., the adhesion or press-fit between the plug-type contact and the plug housing can loosen. Casting compounds are also susceptible to crack formations or are not sufficiently resistant to automatic transmission oils. This leads to leaks in so far as fluid can now pass from the interior space along the plug-type contacts through the plug housing into the exterior space.