Ford produced the AOD four-speed automatic transmission for its 1980s and 1990s production cars, including Lincoln, Mercury and the F-Series pick-up trucks. In 1993 the automaker came out with the AOD-E with electronic overdrive.
The AOD automatic was featured in V-6 and V-8-equipped full-size 1980 to 1992 Fords and Mercurys, 1984 to 1993 Mustangs and Mercury Cougars and Capris, Broncos with the 5-liter V-8, 1981 to 1993 F-Series pickups and E-Series vans and 1980 to 1993 Lincolns, according to Hemmings.
The standard AOD four-speed automatic had a 2.40-to-1 first gear ratio, 1.47-to-1 for second, 1.00-to-1 for third and 0.67-to-1 for fourth or overdrive. The gear ratios are near the 2.46-to-1 ratio on the C-4 and C-6 three-speed transmissions that Ford replaced with the AOD in 1986. The AOD four-speed wide-ratio version had gear ratios of 2.84-to-1, 1.55-to1, 1.00-to-1 and 0.67-to-1. Ford used the wide ratio AOD on performance Mustang and some trucks.
The AOD automatic features a 14-bolt pattern and a neutral safety switch mounted on the driver's side of the case above the valve body. Its speedometer drive cable hooks on the driver's side to the speed sensor. The AOD weighed about 40 pounds more than the C-4 and C-6 versions at 150 pounds.
F150 Ford 1990 Pickup Transmission Specifications
The 1990 Ford F-150 pickup truck had four transmission choices: a three- or four-speed automatic and a four- or five-speed manual. Ford...
How to Adjust a C4 Transmission Cable
Ford's C4 automatic transmission was first produced in 1964 and was one of Ford's most durable transmissions. The C4 provides three forward...
How to Use Overdrive Transmission in a Ford
Ford overdrive transmissions essentially have an extra gear that allows for heightened performance and fuel economy at higher speeds. When the transmission...
How to Identify Ford Automatic Transmissions
Many automatic transmissions have been used by the Ford Motor Company throughout the years, from early Ford and Cruise-O-Matic's to automatic overdrive...
How to Identify a Ford AODE Transmission
The Ford AOD automatic overdrive four-speed transmission, introduced in 1980, was used with most Ford engines of the day. Ford later introduced...
Differences Between the C6 and AOD
The C6 transmission is a three-speed that appeared in most Ford trucks between 1960 and 1997. Ford stopped using the C6 in...
C6 Transmission Specs
The Ford Motor Company manufactured the C6 transmission between 1966 and 1996. It's quite similar to the C4 transmission, but it can...
Specifications for an E40D Transmission
The Ford E40D transmission -- a heavy-duty unit found in E-series vans, F-series trucks, the Bronco and Expedition -- is a computer-controlled...