This tech tip comes from the March issue of BRAKE & FRONT END and Glen Beanard's article about the Ford Fusion
The transmission choices in the Fusion/Milan/ Zephyr/MKZ are the G5M 5-speed manual and FNR5 5-speed auto for the 2.3L versions. The manual transmission has no fluid surprises. It uses 75w90 gear oil.
However, the 5-speed automatic does have a surprise. It doesn’t use Mercon V. The fluid requirement of the 5-speed auto is Mazda V trans fluid. Do not confuse Mazda V fluid for Mercon V, it is not the same thing. The Motorcraft part number for Mazda V fluid is XT-9-QMM5. The 3.0L and the 3.5L have Aisin 6 speed automatics. The 6-speed auto also contains a fluid requirement surprise of its own. It does not use Mercon V or Mazda V. It simply uses a Mercron/Dextron equivilent.
About the Author
Editor, Brake & Front End Magazine
Andrew Markel is a former technician and service writer and he brings this practical knowledge to the Brake & Front End team as editor.