The VIN, or vehicle identification number, is unique to each vehicle and provides much useful information. This information does include what type of engine and what type of transmission the vehicle has.
There are two types of transmission on a 2004 Toyota Tacoma: 5 Speed Manual, or an automatic transmission. Depending on your preference, you can purchase/request the transmission that suits your needs.
Dextron III
Toyota ATF Type T4 This fluid supersedes all other fluids.
Depends on what year, look on the dipstick. And if it doesn't have a dipstick, it uses WS fluid.
The 2001 Toyota Tacoma has double overhead cam (DOHC).
The 2014 Toyota Tacoma has double overhead cam (DOHC).
The 2013 Toyota Tacoma has double overhead cam (DOHC).
The 2002 Toyota Tacoma has double overhead cam (DOHC).
The 2009 Toyota Tacoma has double overhead cam (DOHC).
The 2011 Toyota Tacoma has double overhead cam (DOHC).
The 2005 Toyota Tacoma has double overhead cam (DOHC).
The 2004 Toyota Tacoma has double overhead cam (DOHC).