| rdfs:comment | - The GM "old-look" bus was somewhat streamlined in appearance (resembling the PCC streetcar in styling), similar in shape to a loaf of sandwich bread, and had windows that were generally smaller than those found on more modern bus designs produced after the 1950s. Unlike most earlier buses, the GM "old-look" bus was built using a monocoque design, rather than a body-on-frame design, and it helped shepherd the change from gasoline to diesel-powered buses. Most "old-look" buses were powered with the Detroit Diesel 6-71 inline six-cylinder diesel engine, the exceptions being the shorter models that were powered by the four-cylinder version of the same diesel engine, and buses that were equipped with gasoline engines. Manual and automatic transmissions were available, with the Spicer angle-driv
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| abstract | - The GM "old-look" bus was somewhat streamlined in appearance (resembling the PCC streetcar in styling), similar in shape to a loaf of sandwich bread, and had windows that were generally smaller than those found on more modern bus designs produced after the 1950s. Unlike most earlier buses, the GM "old-look" bus was built using a monocoque design, rather than a body-on-frame design, and it helped shepherd the change from gasoline to diesel-powered buses. Most "old-look" buses were powered with the Detroit Diesel 6-71 inline six-cylinder diesel engine, the exceptions being the shorter models that were powered by the four-cylinder version of the same diesel engine, and buses that were equipped with gasoline engines. Manual and automatic transmissions were available, with the Spicer angle-drive two-speed transmission being used on automatic-equipped buses built prior to 1948. After 1948, the 2-speed Allison V-drive transmission was used on automatic-equipped buses. In 1940 and 1942, a small number of buses were built with electric propulsion systems instead of a transmission. The "old-look" was available in several lengths ranging from feet (m) to feet 6 inches (m), though the most common models were feet (m) and feet (m) feet long. Most "old-look" buses were inches (m) wide, but -inch-wide (m) models were available beginning in 1948. In 1946 GM began offering its Thermo-matic heating and ventilation system, and in 1952 started making suburban models (identifiable by larger passenger windows, and equipped with high-backed forward-facing seats and optional luggage racks). Beginning in 1953, air-ride suspension became standard on all but the smallest model buses, and in 1958, air conditioning was added as an available option. In 1959, GM introduced its New-Look bus with the "fishbowl" style front window, and production stopped on all "old-look" buses other than the "second-generation" models: the -foot (m) TGH-3102 which was built until 1963 and the -foot (m) 35xx models which were built until 1969.
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