<Li> 1950--1965 Ford - O - Matic </Li> <Li> 1958--1979 Cruise - O - Matic <Ul> <Li> MX / FX </Li> <Li> 1968--1981 FMX--A hybrid of the FX and MX </Li> <Li> 1964--1981 C4 <Ul> <Li> Most small - block V8 powered cars of the 1960s and 1970s in the North American market </Li> </Ul> </Li> <Li> 1966--1996 C6 <Ul> <Li> Most big - block V8 powered cars / trucks of the 1960s and 1970s in the North American market, All Fseries trucks without O / D, 80 thru 96 (97 For F250HD, F350, and F - Superduty models) </Li> </Ul> </Li> <Li> 1974--1989 C3--Light - duty, smaller than the C4 </Li> <Li> 1982--1986 C5--Improved C4, with a lock - up converter </Li> <Li> 1985--1994 A4LD--C3 with overdrive </Li> <Li> 1989--1996 E4OD--C6 with overdrive </Li> <Li> 1998--2004 4R100--Replaces the E4OD transmission </Li> <Li> 1995--2001 4R44E--Electronically controlled A4LD, light - duty </Li> <Li> 1995--1997 4R55E--Electronically controlled A4LD, heavy - duty </Li> </Ul> </Li> <Ul> <Li> MX / FX </Li> <Li> 1968--1981 FMX--A hybrid of the FX and MX </Li> <Li> 1964--1981 C4 <Ul> <Li> Most small - block V8 powered cars of the 1960s and 1970s in the North American market </Li> </Ul> </Li> <Li> 1966--1996 C6 <Ul> <Li> Most big - block V8 powered cars / trucks of the 1960s and 1970s in the North American market, All Fseries trucks without O / D, 80 thru 96 (97 For F250HD, F350, and F - Superduty models) </Li> </Ul> </Li> <Li> 1974--1989 C3--Light - duty, smaller than the C4 </Li> <Li> 1982--1986 C5--Improved C4, with a lock - up converter </Li> <Li> 1985--1994 A4LD--C3 with overdrive </Li> <Li> 1989--1996 E4OD--C6 with overdrive </Li> <Li> 1998--2004 4R100--Replaces the E4OD transmission </Li> <Li> 1995--2001 4R44E--Electronically controlled A4LD, light - duty </Li> <Li> 1995--1997 4R55E--Electronically controlled A4LD, heavy - duty </Li> </Ul> <Li> MX / FX </Li>

What transmission is in my 2003 ford f150