Public pools and beaches have lifeguards watching over the action, waiting to swoop in and save a hapless swimmer from drowning. You tranny has something similar: an automatic transmission protection switch. This Hasselhoffian part is there to keep an eye on your tranny, and it's important to replace a washed up automatic transmission protection switch right away. For a premium automatic transmission protection switch automatic transmission guaranteed low prices, steer your web browser over to AutoAnything and get free shipping on your order.