 Wearing all-new exterior sheetmetal, the Chrysler R-platform vehicles were a revision of the 1962-1978 Chrysler B platform (produced for the intermediate segment).With poor sales (outside of fleet markets), Chrysler ended production of R-platform vehicles, becoming the final fullsize Chrysler vehicles until the 1992 LH-platform vehicles.To replace the R-platform, for 1982, the Chrysler New Yorker and Plymouth Gran Fury nameplates shifted to the Chrysler M platform.