Oil level control, function - GF27.10-P-3024SXA

TRANSMISSION 722.6 in MODEL 204.0, 216, 221 up to Model Year 8 

The oil level regulation closes the opening between the oil gallery and gear set chamber so that the rotating gear sets do not churn in the oil as the oil level rises. The power losses are reduced and the escape of oil from the transmission housing is prevented at high oil temperatures.