Downshift inhibitor circuit

Abstract From the Canadian patent

In a transmission control system for a multiple speed ratio powershift transmission having a plurality of fluid pressure operated clutches adapted to establish torque ratio changes and also including an electronic speed sensing system and downshift valve means for automatically shifting the transmission from a higher speed ratio to a lower speed ratio at a first predetermined vehicle ground speed the addition of a downshift, inhibitor or delay circuit for prohibiting downshifts from the higher speed ratio to the lower speed ratio while the vehicle undergoes a full throttle directional reversal. -0-