My manuals don't give an actual quantity, only that the level should be flush with the bottom of the threads of the plug on the right-hand side of the transmission. As I recall, it took mine around two-and-a-half quarts.
The Mustang GT (2011 model) has a 6-speed manual transmission standard and a 6-speed automatic transmission optional. The 2010 Mustang GT had a 5-speed manual transmission standard and a 5-speed automatic transmission optional.
5 speed manual 3.4 quarts 6 speed manual 4 quarts automatic 5 quarts
For a 2002 Ford Mustang , 5 speed manual transmission : With the 3.8 liter V6 engine ( 2.8 U.S. quarts of Motorcraft MERCON automatic transmission fluid ) With the 4.6 L , V8 ( 4.0 quarts of SYNTHETIC MERCON automatic transmission fluid )
The 2007 Ford Mustang has a 5-speed manual.
The 2003 Ford Mustang has a 5-speed manual.
The 2009 Ford Mustang has a 5-speed manual.
The 2014 Ford Mustang has a 6-speed manual.
The 2006 Ford Mustang has a 5-speed manual.
The 2010 Ford Mustang has a 5-speed manual.
The 2005 Ford Mustang has a 5-speed manual.
The 2004 Ford Mustang has a 5-speed manual.
The 2002 Ford Mustang has a 5-speed manual.