Tow Along is a term used to describe the act of towing a vehicle behind another. It is often done when a car needs to be moved from one place to another, such as when it has broken down or needs to be taken to a repair shop. The term DRAG is the four letter solution to this crossword puzzle and is an acronym for 'Directional Rear Axle Gear'. This refers to the gear that is used to control the direction of the towed vehicle.