This is the Rockford Drive Line company logo. Automotive Supply Company Inc. has been in the driveline / driveshaft business since 1930 and is a distributor for the following driveline manufacturers: DANA, NEAPCO, Rockford GKN, Federal Mogul and American Axle. View additional info on driveline components, driveshafts, and bearings at: https://asco-components.com/