Patent ID: 9447868
Filing Date: 2016-09-20
CPC Classification: F16H,Y10T

Claim Text:
1. A method for operating an electro-hydraulic control of a transmission, the method comprising: deactuating a plurality of actuators to place a plurality of shift valves in a destroked position, and blocking application of a torque transmitting mechanism of the transmission in response to deactuating the plurality of actuators unless (i) one of the plurality of actuators is actuated to place one of the plurality of shift valves in a stroked position to deliver fluid pressure to a pressure switch and to a trim valve fluidly coupled to the one of the plurality of shift valves and (ii) an actuator fluidly coupled to the trim valve is actuated to place the trim valve in a stroked position to deliver fluid pressure to the torque transmitting mechanism.