Torque transmitting mechanism engagement control system and method

A method of controlling the engagement of a fillable torque transmitting mechanism comprising:

• providing at least one variable bleed solenoid valve operable to selectively provide pressurized fluid at various pressure values to selectively engage the torque transmitting mechanism;
• commanding said at least one variable bleed solenoid valve to a maximum pressure value for a first predetermined time to substantially fill the fillable torque transmitting mechanism;
• and
• subsequently commanding said at least one variable bleed solenoid valve to a minimum pressure value for a second predetermined time.

A method of controlling an automatically shiftable transmission having a hydraulically actuated fillable torque transmitting mechanism, the method comprising:

• providing at least one variable bleed solenoid valve operable to selectively provide pressurized fluid to selectively engage the hydraulically actuated fillable torque transmitting mechanism;
• commanding said at least one variable bleed solenoid valve to a maximum pressure value for a first predetermined time to substantially fill the hydraulically actuated fillable torque transmitting mechanism;
• subsequently commanding said at least one variable bleed solenoid valve to a minimum pressure value for a second predetermined time;
• and
• commanding said at least one variable bleed solenoid valve to an intermediate pressure value for a third predetermined time to trim the hydraulically actuated fillable torque transmitting mechanism into engagement.