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If your asking about your 2002 F-250 tranny & it calls out auto-tranny fluid, you should be using Mercon-V as this TSB indicates. Fulltext TSBs | Ford Trucks
Mercon-V is a semi-synthetic friction modified fluid that's back specified to replace Mercon. It has a better quality base oil & additive package than the old Mercon recipe, so you might find you'll get better shift quality using it. Let us know how it goes.
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.