He became a very successful breeding stallion whose other progeny included Speak John, Stage Door Johnny, Typecast, Silent Screen and Deceit.
In August at the Curragh he attempted to win his third consecutive race in the Blandford Stakes but was beaten a length into second by the Dermot Weld-trained Panamint with the filly Sassabunda in third.
[2] In the Irish St. Leger at the Curragh on 17 September Transworld was partnered by Tommy Murphy after Lester Piggott opted to ride the O'Brien stables main hope Valinsky, the winner of the Geoffrey Freer Stakes.
Murphy sent Tranworld into the lead from the start and was never seriously challenged, shaking off his closest pursuer Valinsky early in the straight and drawing clear of the field to win by four lengths from Orchestra.
The best of his offspring was the outstanding steeplechaser Lonesome Glory but he sired several other top-class performers including Winton (Venezuelan Horse of the Year), Powder Break (Pan American Handicap), The Hague (Hollywood Turf Cup) and Only Queens (Demoiselle Stakes).