FORD 2006 Freestar v.2 - Manual (Page 314)

TRANSMISSION/TRANSAXLE CODE DESIGNATIONS
You can find a
transmission/transaxle code on the
Safety Compliance Certification
Label. The following table tells you
which transmission or transaxle
each code represents.
Description Code
Four-speed automatic (4F50N) N
2006 Freestar (win)
Owners Guide (post-2002-fmt)
USA (fus)
Maintenance and Specifications
314