What does the term "manual valve" refer to in an automatic transmission?

The term "manual valve" in an automatic transmission specifically refers to the part that allows the driver to select the desired gear range. This component plays a crucial role in the operation of the transmission system, as it provides the interface for the driver to engage or disengage specific gear settings, such as park, reverse, neutral, and drive.

When the driver moves the gear selector, it operates the manual valve, which directs hydraulic fluid to various parts of the transmission based on the selected gear. This action determines how gears are engaged and ensures that the vehicle operates smoothly in the desired mode. Thus, the manual valve has a direct impact on the performance and functionality of the transmission system, making it essential for the driver's control over the vehicle's operation.

Understanding this component is key for those looking to diagnose or repair automatic transmissions, as improper handling of the manual valve can lead to transmission issues that affect gear selection and vehicle performance.