This page is designed to assist you in identifying the transmission installed in your vehicle. We are making the assumption that your vehicle has the original type transmission that was installed at the factory. In most cases, if your vehicle has been converted from an overdrive to a 3-speed, you can still use this guide for identification. If the drivetrain in your vehicle has been customized in any other way, you should call our techs for help identifying your transmission.
Front Wheel Drive |
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3 Speed |
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| Year | Model | ||
| 1981-up | ATX | Pan on bottom and top of transmission. | |
Overdrive |
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| Year | Model | ||
| 1986-1990 | AXOD | Has T.V. cable and speedo housing. (Read more…) | Pictures |
| 1991-up | AXODE | Has electrical connector where T.V. used to be and speedo housing. (Read more…) | Pictures |
| 1995-up | AX4N | Has “AX4N” on side pan and electronic speedo connector. (Read more…) | Pictures |
| 2001-up | 4F50N | Similar to AX4N. Will have 4F50N stamped on tin side cover or it will have an aluminium side cover. (Read more…) | |
Rear Wheel Drive |
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3 Speed
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| Year | Model | Pictures | |
| 1964-1981 | C4 (Non Lock-Up) | Aluminum case, Removeable bell housing, modulator on right rear of case, 11 pan bolts. | Pictures |
| 1982-up | C5 (Lock-Up) | Same as C4 with auxiliary internal valve body. Note deeper pan (2nd pic). | |
| 1974-1987 | C3 (Smaller Vehicles) | Modulator on right side, one servo on right side of case. | |
| 1968-1981 | FMX | Cast iron case, dipstick tube in case, removable bell housing, 13 pan bolts. | |
| 1966-1980 1966-1979 1966-up |
C6 (Cars) C6 (Lincoln) C6 (Trucks) |
Cast iron case, non-removeable bellhousing, vacuum modulator on right rear, 17 pan bolts. Has aluminum case with non-removable bell, modulator in right rear side. | |
Overdrive |
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| Year | Model | ||
| 1985-up | A4LD (Smaller Vehicles) | Removable bell housing, modulator and 2 servos on right side of case, 18 pan bolts. (Read More…) | |
| 1980-1991 | AOD (FIOD) | No vacuum modulator, has kickdown (T.V.) arm, 14 pan bolts. Has cast pump. | Pictures |
| 1992-up | AODE & 4R70W | No vac mod or throttle valve rod, large “D” shaped electrical connector on right side, 14 pan bolts. Has aluminum pump. | Pictures |
| 1989-up | E4OD | No modulator, large oval electrical connector on right rear, 20 pan bolts. (Read More…) | Pictures |
| 1998 | 4R100 | It has an input speed sensor, a bypass tube and a rotor on the output shaft. Sometimes, some have PTO. |
| 2003 | 5R110 | Steel Pump, 5R55 looking black plug by dipstick tube, Rotor on outplug. Some have PTO. New Type has valv body. 6.0L Diesels |