Transmission control devices may have two control boxes, and a planar transmission control plate disposed between the two control boxes. The transmission control plate seals the intermediate space between the two control boxes or the channel portions and borings thereof in the form of a flat gasket. The plate also makes available throughflow-openings between channels or borings in the control boxes for a fluid, the fluid in the channels controlling the function of a transmission. The sealing function is achieved by embossed beads and/or partial coatings.