The ATS APPS/TPS Signal Conditioner, commonly known as "the sponge" in online communities, is designed to repair and prevent erratic lock-up shifts between 3rd and 4th gears. By conditioning the Throttle Position Sensor (TPS) signal, this product allows for smoother and more controlled transmission shifts. The factory Transmission Control Module (TCM) is highly sensitive, but with the ATS Signal Conditioner, the signal is stabilized, resulting in improved shift characteristics and enhanced driving performance. Perfect for those looking to fine-tune their transmission's responsiveness.