A drag winch assembly for a tow vehicle, such as a wrecker, that includes a slidable boom assembly. The drag winch assembly comprises a slidable support connected to the slidable boom assembly in slidable engagement with the main frame of the wrecker and a drag winch mounted on the slidable support. With this configuration, the slidable support is slidable between a first position corresponding to the frontmost position of the slidable boom assembly and a second position corresponding to the rearmost position of the slidable boom assembly, providing advantages existing winch assembly configurations.