You add the trans fluid where the dipstick is at, if it is a manual then you will have to go under the car where the transmission is find the check level plug on the transmission loosen the plug and stick your pinky in it if fluid touches the pinky then your good if not add the fluid there!
look in the manual
you can remove the shifter base from the tranny and pour in through there
The recommended automatic transmission fluid for the 2005-2007 Mustang is Mercon V automatic transmission fluid
The dipstick cover is labeled Transmission Fluid. Transmission fluid on a 2000 Ford Mustang is added in the neck of the dipstick tube after the dipstick has been removed.
it takes mercon v atf transmission fluid in all ford mustangs
Type F Automatic Transmission Fluid.
THere is no dipstick on a 2005-2007 Mustang since Ford considereds the transmission sealed it wont need fluid added unless it has a leak or you are changing the fluid.
Motorcraft MERCON automatic transmission fluid in the 5 speed manual transmission according to the 1997 Ford Mustang Owner Guide
Mercon V automatic transmission fluid
Motorcraft MERCON automatic transmission fluid in the manual transmissions on a 2004 Ford Mustang ( according to the Owner Guide )
Motorcraft MERCON automatic transmission fluid for your manual transmission
Mercon V