"Barracuda" returned to Coco Solo, Canal Zone, on 7 September 1942 and, following voyage repairs, she proceeded to Philadelphia, Pennsylvania, for overhaul. At this time she was converted to a cargo submarine with the removal of her main engines, severely restricting her speed on the auxiliary engines. Following overhaul she was based at New London until February 1945 with Submarine Divisions 13 and 31. She operated on training problems with destroyers, other submarines, and planes in Block Island Sound. "Barracuda" arrived at Philadelphia Navy Yard on 16 February 1945; was decommissioned 3 March 1945; and sold 16 November 1945.