For 1983, the Ford and Mercury product ranges saw a number of extensive changes. To move its full-size nameplates upmarket, the Ford LTD Crown Victoria and Mercury Grand Marquis became the sole full-size sedans, while the LTD and Marquis nameplates were moved to the mid-size Fox platform as restyled versions of the Granada and Cougar sedan and wagon to replace those slow selling models. To reverse the sales collapse of the Ford Thunderbird and Mercury Cougar (now solely a coupe), Ford redesigned the two coupes with radical new aerodynamic bodystyling.