Allen-Bradley 309-AOD-EEC

The part number 309-AOD-EEC is specifically associated with the Ford AOD transmission, an automatic overdrive system prevalent in numerous Ford vehicles from the 1980s and 1990s, including the Mustang, F-Series, and Taurus. This transmission is characterized by its robust one-piece casting that merges the bellhousing and main case, along with a screw-in multi-pin connector for backup lights and neutral safety functions. Notable for its durability, the AOD transmission delivers smooth shifting and reliable performance, utilizing a hydromechanical design and a conventional tailshaft flyweight valve governor that adjusts shifts based on vehicle speed. While it lacks a dedicated user manual, effective troubleshooting generally involves checking fluid levels and transmission connections. Installation is best left to experienced mechanics due to the specialized knowledge required to replace the existing transmission without causing damage. The AOD transmission remains a sought-after choice for classic car enthusiasts who appreciate its distinctive characteristics and engineering legacy.