This component represents an aftermarket modification for a specific type of automatic transmission. It alters the operational characteristics, providing the driver with increased control over gear selection. Instead of relying solely on the transmission’s internal computer or hydraulic governor for shifting, this modification allows the operator to manually command gear changes, similar to a standard manual transmission.
The significance of this alteration lies in enhanced performance and customization. Benefits include firmer, quicker shifts, improved engine braking, and the ability to hold a specific gear at higher RPMs for racing or off-road applications. Historically, these were developed to provide greater control to drivers of vehicles equipped with automatic transmissions, addressing limitations perceived in factory programming. This can lead to advantages in competitive driving scenarios or when navigating challenging terrains.