The kind that is compatible with the specific model you had in mind. "Four wheel drive Ford" leaves a whole lot of models which you could be referring to, not to mention that, you never gave a model year, either, so you could be talking about models which are out of production, too.
The 2003 Ford Expedition has rear wheel drive.
The 2003 Ford Explorer has rear wheel drive.
The 2002 Ford Escape has front wheel drive.
The 2011 Ford Expedition has rear wheel drive.
The 2002 Ford Expedition has rear wheel drive.
The 2009 Ford Fusion has front wheel drive.
The 2010 Ford Mustang has rear wheel drive.
The 2003 Ford Focus has front wheel drive.
The 2009 Ford Expedition has rear wheel drive.
The 2011 Ford Mustang has rear wheel drive.
The 2004 Ford Focus has front wheel drive.
The 2012 Ford Fiesta has front wheel drive.