The valve shown in a transmission diagram is what type?

The governor valve is an essential component in an automatic transmission system, primarily responsible for helping to manage fluid pressure based on vehicle speed. This valve adjusts the hydraulic pressure to various transmission components, contributing to shifting and performance.

The governor valve operates by utilizing centrifugal force from the rotation of the gears, which allows it to sense the speed of the vehicle and adjust the line pressure accordingly. As the vehicle accelerates, the governor valve increases the pressure to facilitate smoother and more efficient shifts at higher speeds. This is crucial for ensuring that the transmission shifts appropriately based on driving conditions and maintaining performance and drivability.

In contrast, the other types of valves mentioned serve different functions in an automatic transmission system. For example, the pressure regulator valve controls the overall pressure within the transmission system, while the manual valve permits the driver to select different driving modes. The primary throttle valve is involved in managing flow to the transmission based on throttle position. Each of these plays distinct roles, but the function of the governor valve is specifically aligned with responding to vehicle speed, making it the correct choice in this context.