Ford AOD transmission

Infobox Automobile
name=AOD
aka=AODE
AOD-EW/4R70W
production=1980–present
manufacturer=Ford Motor Company
related=E4OD
class=4-speed longitudinal automatic transmission
predecessor=Cruise-O-Matic
C-5
successor=6R
similar=GM 4L60-E/4L65-E
Chrysler A-727The AOD (for automatic overdrive) was a four-speed automatic transmission with overdrive. Introduced in 1980, it was Ford's first four-speed automatic overdrive transmission. The design is based on the same gearset as the Ford FMX transmission of the 1960s and 1970s. The AOD replaced the majority of Ford's older transmissions, including the Cruise-O-Matic and C5.

Applications:
* 1980–1986 Ford LTD
* 1980–1993 Ford Thunderbird
* 1980–1993 Mercury Cougar
* 1980–1993 Ford Mustang
* 1980–1986 Mercury Marquis
* 1980–1987 Lincoln Continental
* 1980–1983 Lincoln Mark VI
* 1983–1990 Ford Econoline
* 1983–1991 Ford LTD Crown Victoria
* 1983–1992 Mercury Grand Marquis
* 1982–1993 Ford Bronco
* 1980–1990 Lincoln Town Car
* 1980–1987 Lincoln Continental
* 1980–1983 Lincoln Mark VI
* 1984–1992 Lincoln Mark VII
* 1992 Ford Crown Victoria

Gear ratios

* First: 2.40:1
* Second: 1.47:1
* Third: 1.00:1
* Overdrive: 0.67:1
* Reverse: 2.00:1

AODE

The AOD was redesigned with electronic controls in 1991, becoming the AODE. It was mainly intended for the new Modular V8 at first, but it was also adapted to the old AOD bell-housing for vehicles still powered by OHV engines. While the AOD and AODE/4r70w share some basic components like oil pans, gear sets (AODs and AODE can be retrofit with 4r70w gear sets), most of the internals are not interchangeable. The transmissions are not interchangeable either, as the AOD only uses a throttle valve cable for operation. The AODE and 4r70w are controlled by the Powertrain Control Module (PCM) also sometimes referred to as the Electronic Engine Control (EEC). Applications:
* 1991–1994 Lincoln Town Car
* 1993–1994 Ford Crown Victoria
* 1993–1994 Mercury Grand Marquis
* 1994–1995 Ford Mustang

4R70W

A revised version of the AODE was released in 1993 with the Lincoln Mark VIII. 4R70W stands for 4 gears, Rearwheeldrive, 70x10=700 ftlb load capacity at the output of the torque converter and Wide gear ratio. It has lower 1st and 2nd gear ratios for better take-off acceleration and improved gearset strength. On vehicles powered by a 5.4 L V8, a stronger gearset is used than in normal duty 4R70Ws. In 1998, due to durability concerns, the intermediate one-way roller clutch was replaced with a mechanical diode providing extra holding capacity and longer service.

The gear ratios are:1st: 2.84 :12nd: 1.55 :13rd: 1.00 :14th: 0.70 :1Rev: 2.23 :1

Applications:
** 1993–1998 Lincoln Mark VIII
** 1993–2003 Ford F-Series
** 1994–1997 Ford Thunderbird
** 1995–1998 Lincoln Mark VIII
** 1995–2004 Ford Crown Victoria
** 1996–2001 Ford Explorer
** 1993–2004 Lincoln Town Car
** 1994–1997 Mercury Cougar
** 1995–2004 Mercury Grand Marquis
** 1997–2004 Ford Expedition
** 1997–2001 Mercury Mountaineer
** 1996–2004 Ford Mustang

With all the new components added to the 4R70w since 1993, Ford decided to designate newer transmissions with the name 4R75W so that an older transmission would not be used in the newer vehicles.

The most practical modification for the 4R70W is the [http://www.tccoa.com/articles/tranny/transmission/index.shtml J-mod] . It is a shift kit specified by one of the Ford engineers that designed the transmission. It offers quicker shifting, smoother operation, and increased service life. All parts can be bought at Ford dealers for less than $60.

A 20,000+ GVW cooler is highly recommended with or without a shift kit. Breakdown of the friction modifier in the fluid often results in "converter shudder" (feels like driving over rumble strips) where converter tries to lock up, but slips.

4R7xx Usage

2002
* 4R70W used in all applications2003
* 4R75W used in Mercury Marauder, V8 Mustang (GT and Mach 1), and 5.4 L trucks (F150, Van, and Expedition)
* 4R70W used in all other applications (V6 Mustang, 4.6 L Van, 4.2 L F150, 4.6 L F150, and Crown Vic/Grand Marquis/Towncar)2004
* 4R75E used in 5.4 L-3v F150
* 4R70E used in 4.6 L F150 (except F150 Heritage)
* 4R75W used in Mercury Marauder, V8 Mustang (GT and Mach 1), and 5.4 L-2v trucks (Van, and Expedition)
* 4R70W used in all other applications (V6 Mustang, 4.6 L Van, 4.6 L Expedition, Crown Vic/Grand Marquis/Towncar, and F150 Heritage).2005
* 4R75E used in 5.4 L trucks (F150, Van, and Expedition)
* 4R70W used in F150 Heritage (sold only in Mexico)
* 4R70E used in all other applications (4.6 L Van, Crown Vic/Grand Marquis/Towncar, and 4.6 L F150 (except F150 Classic (sold only in Mexico))2006 to 2008
* 4R70W used in F150 Heritage (sold only in Mexico)
* 4R75E used in all other applications (Van, Crown Vic/Grand Marquis/Towncar, and F150 (except F150 Heritage (sold only in Mexico))

ee also

* List of Ford transmissions