Transition-to-turbine seal apparatus and kit for transition/turbine junction of a gas turbine engine

One embodiment of a transition-to-turbine seal comprises a transition exit seal adapted for fixed attachment to an exit rail of a transition, and a stage-1 seal. The stage-1 seal comprises an axial seal slot comprising parallel walls adapted to slidingly engage a first male member of the transition exit seal. The stage-1 seal also comprises a radial seal slot comprising parallel walls adapted to slidingly engage a plate of a row 1 vane segment. The transition-to-turbine seal thus provides both axial and radial freedom of movement. Materials and coatings for the transition exit seal and the stage-1 seal are selected to promote preferential wear of these components relative to wear of the surface of the row 1 vane segment. Wear of the exit rail is reduced or eliminated due to the noted fixed attachment.