a method for controlling trapped air in a clutch of an automatic clutch - to - clutch transmission includes , calculating a pulse on time based on a clutch volume and adaptive convergence . a pulse off time is calculated based on a temperature of transmission fluid . a pulse number is calculated based on the temperature of transmission fluid . a maximum pressure is commanded to the clutch based on the pulse on time and a minimum pressure is then commanded to the clutch based on the pulse off time . a pulse counter is incremented when the pulse off time expires . the steps of commanding maximum pressure , then commanding minimum pressure , and incrementing the pulse counter are repeated until the pulse counter equals a desired pulse number .