Within the past few years, Ford has introduced two 4-speed automatic overdrive transmissions: the AOD and A4LD. Many readers have inquired whether either of these new transmissions can replace ...

The original AOD (Automatic ... engine and transmission function. In 1991, Ford introduced the computer-controlled AOD-E, which was first installed behind Ford’s new SOHC 4.6L Modular V-8 ...