Filter, Remote Automatic Transmission Filter Kit. Derale’s Remote Automatic Transmission Filter Kits are engineered to work in conjunction with the OEM transmission filter. The OEM system prevents any foreign particles from entering the valve body or other internal components. Derale’s kit maintains the fluid, removing any varnish, sludge or contaminants. This filter goes in the pressure line going to the radiator. Doubles Transmission Life, Extends Time Between Fluid Changes, For All Automatic Transmissions.