No Sean, no "trailer hitching" on mine, as it locks up only in 4th. The 4th gear switch must have a paint stripe on it IIRC to work as HRL descibes. Mine already had the "proper" swtich, it is hooked to the case connector, all other wiring inside the valve body was removed, except a ground, I think. Seems I got some wiring info from bowtieoverdrives or chuckthetruck's website. Brian