Sable. Chassis specifications The fourth-generation Marquis uses the rear-wheel drive Ford Fox platform. Initially developed for compact sedans, the architecture was expanded for a wide range of Ford and Lincoln-Mercury vehicles; as a multiple-wheelbase design, the Fox platform was introduced for the mid-size segment for 1980. A 105.6 inch wheelbase is shared with the Marquis, Ford LTD, and the Ford Granada/Mercury Cougar. The Fox architecture uses a unibody chassis, rather than a body-on-frame design used by full-size Ford and Lincoln-Mercury vehicles). In line with other Fox-platform vehicles, the Marquis uses a front suspension of MacPherson struts with a four-link live rear axle (using coil springs). As with the previous generation, the Marquis used front disc brakes with rear drum brakes. Powertrain The fourth-generation Marquis was offered with four separate engines over its production. Sedans featured a 2.3L inline-4 as standard equipment; a propane-fuel version of the engine was an option. Station wagons were marketed with six-cylinder engines; a 3.3L inline-6 (dating back to the Falcon/Comet) was the standard engine for station wagons and optional on sedans. A 3.8L V6 was optional on both body styles, replacing the inline-6 entirely for 1984. Sold only in Canada from 1984 to 1985, the Marquis LTS was powered by the 5.0L HO V8 (shared with the Mustang). A 4-speed manual was standard with the 2.3L engine, and was deleted after 1983; subsequent production used the previously optional 3-speed C3 automatic. The 3.3L six was paired solely with a 3-speed C5 automatic. The 3.8L V6 used two different transmissions: the 4-speed AOD automatic was standard for 1983, becoming an option for 1984; the 3-speed C5 became standard for 1984 (replacing the AOD entirely for 1985). All examples with the 5.0L V8 (the LTS) used the 4-speed AOD automatic. Body design The fourth-generation Marquis was produced as a four-door sedan and as a five-door station wagon (the two-door was discontinued, with the Cougar becoming the sole Mercury mid-size coupe. Sharing its entire bodyshell with its Ford LTD, the Marquis was distinguished by its own grille, taillamps, and parking lamp lenses. For the 1985 model year, the Marquis underwent a minor exterior revision; along with revised taillamps, Mercury lettering in the grille was replaced with a centered crest emblem. The interior of the Marquis and LTD was largely shared between the two model lines (with the exception of the interior door panels). To save development costs, the