Ford Flex— Transmission Guide
Complete transmission type, fluid specification, and service interval data for every Ford Flex generation.
2009–2019
Transmission
6-Speed Automatic
Code: 6AT
Fluid Specification
ATF (check OEM spec — many require brand-specific)
Service Interval
Every 30,000 miles
Engine
3.5L Cyclone V6 NA | 3.5L EcoBoost V6 twin-turbo (SHO/Limited EcoBoost) — Direct Injection
Drivetrain Options
FWD, AWD
Frequently Asked Questions
What transmission does a Ford Flex have?
The Ford Flex uses a 6-Speed Automatic (6AT). Depending on the model year and trim level, the exact transmission may vary — see the year-by-year breakdown above for full details.
What fluid does a Ford Flex transmission take?
The recommended transmission fluid is ATF (check OEM spec — many require brand-specific). Always verify with your owner's manual or dealership, as the correct fluid can vary by production year and transmission variant.
How often should I service the Ford Flex transmission?
The recommended service interval is every 30,000 miles. Severe driving conditions (towing, frequent stop-and-go, extreme temperatures) may require more frequent service. Regular transmission maintenance is one of the best ways to prevent costly repairs.
Use our transmission lookup tool to search by year, make, and model for any vehicle.
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