Transmission control with governor discontinuance control valve

摘要

A transmission control for a multi-speed transmission having governor pressure controlled shift valves for controlling interchange of speed ratios. A downshift control valve is disposed in the transmission control between one shift valve and the automatic low speed ratio drive establishing device to prevent automatic downshifting to the low speed ratio from a higher speed ratio, separated therefrom by at least one step, upon sudden discontinuance of or reduction in governor pressure.