A transmission has a float level sensor in a fluid sump of the transmission case. A shield having a first panel and a second panel connected to and generally perpendicular with the first panel. The first panel cooperates with a first wall of the transmission case in the sump. The second panel cooperates with a second wall and a bottom wall of the transmission case in the sump. The first and second panels are adapted to cooperate with the first wall, the second wall, and the bottom wall of the transmission case to form a generally stagnant well within the fluid sump surrounding the fluid level sensor to decrease fluid motion adjacent to the sensor. The generally stagnant well and the sump are in fluid communication with one another.