Automatic transmission governor having deceleration sensitive pressure switching feature

In a governor valve assembly for an automatic transmission in an automotive vehicle driveline having an internal combustion engine:

• a driven shaft forming a torque output member for said transmission;
• a governor body connected to and rotatable with said driven shaft, said body having an opening through which said shaft extends, said body being rotatable relative to said driven shaft, stop means for limiting relative angular displacement of said body and said driven shaft;
• spring means for biasing said body to a first position relative to said driven shaft as determined by said stop means, said body being angularly adjustable to a second position relative to said driven shaft in response to deceleration inertia forces acting on said body as said driven shaft is decelerated;
• a governor pressure port and a vent port in said body communicating with said opening at angularly spaced locations, and a governor pressure passage rotatable with said driven shaft and registering with said governor pressure port when said body and said driven shaft assumes said first relative position;
• said body being angularly adjustable to a second position relative to said driven shaft whereby said governor pressure passage is brought into communication with said vent port and said governor pressure port is blocked.