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The AOD (for automatic overdrive) is a four-speed automatic transmission with overdrive. Introduced in 1980, it was Ford's first four-speed automatic overdrive transmission. The gearset design is based on the Ford "X" automatic transmissions used during the 1950s, 60s, and 70s. The AOD replaced many of Ford's older transmissions such as the C4, C5, and light duty applications of the FMX. ==History== In 1962 Ford began working on a new type of automatic transmission that would emphasize fuel economy and driveability. The new transmission was built around the Ravigneaux planetary of the "X" transmissions. Where many transmissions had a fourth gear added on as an afterthought, Ford's new transmission was designed with a fourth gear integrated into the gearset. Because it was based on the X transmissions, its gear ratios from 1-3 were the same with the fourth being .67:1. The transmission featured a split-torque application for third gear as well as a lockup in the torque converter. The XT-LOD was initially abandoned in 1966 but design began again in 1974 as a result of rising gas prices. The project was shelved with a design that lacked a dampener in the torque converter but after the project was revisited a dampener ultimately made its way into the final design. The transmission was introduced when Ford started to downsize its full size line in 1979. Initially called XT-LOD (Extension Lock-Up Overdrive) its name was changed when revisited in 1974 to FIOD (Ford Integrated Overdrive) and then to its final name in 1979, the Ford AOD transmission.() Applications: * 1980–1986 Ford LTD * 1980–1993 Ford Thunderbird * 1980–1993 Mercury Cougar * 1984–1993 Ford Mustang * 1980–1986 Mercury Marquis * 1983–1993 Ford Econoline * 1983–1991 Ford LTD Crown Victoria * 1983–1992 Mercury Grand Marquis * 1982–1993 Ford Bronco * 1981–1992 Lincoln Town Car * 1980–1987 Lincoln Continental * 1980–1983 Lincoln Continental Mark VI * 1984–1992 Lincoln Mark VII * 1992 Ford Crown Victoria * 1980–1993 Ford F-Series 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ford AOD transmission」の詳細全文を読む スポンサード リンク
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