Starting in 1982, Teague worked on the first large cars sold by AMC since 1978, the front-drive sedan code named X-58, for introduction in late-1986. and a companion code named X-59, that was to debut for the 1988 model year. He achieved a roomy interior in an aerodynamic design, and the two-door model was to have featured hidden headlamps, but the coupe was never produced. Giorgetto Giugiaro penned the sharper-edged exterior design for the four-door sedan that went into production as the Eagle Premier.