1. Ford C6 transmission (1966-1996): 125-150 lbs (57-68 kg)
2. Ford AOD transmission (1980-1993): 105-120 lbs (48-54 kg)
3. Ford E4OD transmission (1989-1997): 150-170 lbs (68-77 kg)
4. Ford 4R70W transmission (1997-2010): 120-140 lbs (54-64 kg)
5. Ford 5R55W transmission (2005-present): 130-150 lbs (59-68 kg)
These weights are for the transmission alone and do not include the weight of any additional components, such as the torque converter or transmission fluid.