The 2009 Ford Flex uses a six-speed automatic transmission. The exact variant depends on the drivetrain: front-wheel-drive models typically use the 6F35, while all-wheel-drive models use the higher-capacity 6F55.
In 2009, Ford offered the Flex with either front-wheel drive or all-wheel drive, pairing each configuration with a Ford 6-speed automatic from the 6F family. This piece explains which transmission you’re likely to find on a given Flex configuration and what that means for maintenance and parts compatibility.
Transmission variants in the 2009 Ford Flex
The following summarizes the two main automatic transmissions used in 2009 Flex models and the drivetrains they typically accompany.
- 6F35 — 6-speed automatic designed for front-wheel-drive configurations; standard on most 2009 Flex FWD models; features electronic controls and a manual shift mode on supported trims.
- 6F55 — 6-speed automatic designed for all-wheel-drive configurations; higher torque capacity and a tougher case; used with AWD 2009 Flex models.
These two variants cover the lineup's transmission needs, with the FWD typically paired with 6F35 and the AWD with 6F55.
Drivetrain-specific notes
Front-Wheel Drive (FWD)
In FWD Flex models, the 6F35 transmission handles the 3.5-liter Duratec V6 and is controlled by Ford's electronic transmission controls, offering standard automatic shifting and optional manual shift mode where equipped.
All-Wheel Drive (AWD)
For AWD variants, the 6F55 provides a higher torque capacity to manage the combined load of the AWD system and the V6 engine, with similar electronic controls and drive-mode behavior as the FWD version.
Summary
In short, the 2009 Ford Flex uses a six-speed automatic transmission, with the 6F35 typically found in FWD models and the 6F55 in AWD models. Identifying which variant your Flex has is helpful for maintenance, parts compatibility, and service planning.