The AOD transmission is a classic automatic overdrive transmission developed by Ford to improve fuel efficiency and highway performance. Designed with a fourth-gear overdrive, it allows lower engine RPMs at cruising speeds, reducing wear and improving mileage. Commonly found in rear-wheel-drive Ford, Lincoln, and Mercury vehicles from the 1980s and early 1990s, the AOD transmission is known for its mechanical simplicity and durability. Its hydraulic operation eliminates the need for complex electronics, making it easier to service and rebuild. When properly maintained or replaced with a quality unit, the AOD transmission delivers smooth shifting and dependable performance. It remains a popular choice for restorations, daily drivers, and classic car enthusiasts seeking factory-style operation with improved efficiency.
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