I believe that is a ( 4R70W )
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.
The 1987 Ford Mustang came with a T-5 five-speed manual or optional automatic transmission.
The 2000 Ford Mustang GT came with a five-speed manual or an optional four-speed automatic
Manuel transmission- Borg & warner T5 5 speed Automatic transmission- AOD 4 speed auto
The 1997 Ford Mustang came standard with a five-speed manual or an optional four-speed automatic
4 speed with a lock up torque converter
The 1989 Ford Mustang GT came with a T-5 five-speed manual or an optional automatic transmission
3 speed manual or 3 speed automatic transmission 7.5 inch open rear end
Motorcraft MERCON automatic transmission fluid in the 5 speed manual transmission according to the 1997 Ford Mustang Owner Guide
I believe that is the ( 5R55S ) 5 speed automatic transmission Open the drivers door and look for an information sticker , it will show the transmission code ( TR ) The code for the ( 5R55S transmission is " L " )
The 6 cylinder Mustangs came with 2 transmission options Base option was a 3 speed manual which could be upgraded to the 3 speed automatic .
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 )