R134a
The 2004 Toyota Tacoma has double overhead cam (DOHC).
It does not use Freon as a refrigerant. It uses R134 refrigerant.
R 134-A refrigerant
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.
R134a
The 2014 Toyota Tacoma has double overhead cam (DOHC).
The 2013 Toyota Tacoma has double overhead cam (DOHC).
The 2012 Toyota Tacoma has double overhead cam (DOHC).
The 2007 Toyota Tacoma has double overhead cam (DOHC).
The 2009 Toyota Tacoma has double overhead cam (DOHC).
The 2005 Toyota Tacoma has double overhead cam (DOHC).