SHELBY GT 350 Member
Joined: Jan 2011
Location: Central Massachusetts
The manual is usually right on maintenance needs since it is designed to make sure that Ford does not have warranty issues, so it does not "need" to be changed.
That said, it doesn't hurt to change it. If you do change it, use a good synthetic fluid (I like Mobil 1 but there are others) and make sure you have the correct friction modifier. Check the fluid bottle, many of them have the friction modifier already in it. After changing it, do some tight figure 8's in a parking lot to work the new fluid into the clutch packs; and if you experience any binding or jumping that does not go away after a few more figure 8's, then add more friction modifier and do it again.
| 2010 GT coupe | Daily Driver with some Steeda and GT500 take-off stuff for the occasional track day