6F50 Valve Body 2009, new other (see details) and ready to install. Fits the 6F50. Ships fast from the USA.
If your 2009 Ford Taurus, Flex, Edge or Lincoln MKS or MKX is shifting harsh, slipping, losing fuel economy, or the torque converter clutch won't apply and release cleanly, the valve body is a common point of failure on the 6F50/6F55 six-speed. This is a new-other valve body for the 2009 model year - unused but possibly showing a cosmetic mark or open-box sign, not a rebuilt core - built as a direct replacement for the unit wearing out in your transaxle.
The 6F50/6F55 is a clutch-to-clutch automatic transaxle, so there's no mechanical fail-safe behind the valve body - it routes line pressure through precision bores and spool valves to apply each clutch pack, and carries the solenoids that the transmission control module fires to time every shift. Sonnax's zip kit documentation for this valve body attributes a specific set of symptoms to worn oil circuits inside the casting: burnt clutches, line pressure instability, loss of fuel economy, no line rise, pressure loss, shift concerns, and torque converter clutch apply and release problems with stored TCC codes - which lines up with most of what drivers notice before the transmission finally throws a hard fault.
Scan for codes first and note whether the complaint is a clean mechanical shift problem or a TCC-specific fault - the two point at different circuits inside the same valve body. 2009 sits exactly on the dividing line between Sonnax's two remanufactured valve body catalog numbers for this transmission: the early FD6F50E (1.35 ratio 3-5-R clutch regulator, stamped BS7T4P, covering 2007-2009 units) and the late FD6F50L (1.83 ratio, stamped BSAA5P, covering 2009-and-later units). Sonnax specifically warns the two look nearly identical but are not interchangeable, so pull the casting stamp before you order rather than going by model year alone.
This listing is for the 6F50/6F55 as installed in the 2009 Ford Taurus, Flex and Edge and the Lincoln MKS and MKX. Because 2009 is the exact changeover year between the early and late valve body design, check the BS7T4P or BSAA5P stamp on the side of your unit against the photos before ordering, or send your VIN so we can confirm which revision your vehicle actually carries. We also stock the early-production 6F50 valve body and the standard 6F50 valve body listing if your casting marks point the other way. If you're running the related transaxle in a Ford Escape, Fusion or Lincoln MKZ, that's the 6F35 rather than the 6F50 - see our 6F35 transmission problems guide for that family's specific failure points.
Change the fluid at the same time as the valve body - this transaxle is specified for Motorcraft Mercon LV ATF, and running anything else risks the exact line-pressure and shift-feel complaints this part is meant to fix. Torque the valve body bolts in the factory sequence rather than corner to corner, and after the swap clear codes and let the TCM run its adaptive relearn so shift timing is tuned to the new unit instead of the worn one. If your complaint was TCC-specific rather than a full shift-quality problem, a standalone 6F50 solenoid kit may address it for less, and a 6F50 shift kit firms up shift feel once the hydraulics are sound.
| Fits | 6F50 2009 |
| Part type | Valve Body |
| Condition | New Other (See Details) |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The 2009 Ford Taurus, Flex and Edge, and the 2009 Lincoln MKS and MKX, all equipped with the 6F50 or 6F55 six-speed automatic transaxle.
2009 is the changeover year between Sonnax's two valve body designs for this transmission: the early 1.35-ratio unit (stamped BS7T4P) and the late 1.83-ratio unit (stamped BSAA5P). They look nearly identical but are not interchangeable, so confirm your casting stamp before ordering.
Harsh or flared shifts, loss of fuel economy with no other cause, a torque converter clutch that won't apply or release cleanly with a stored TCC code, and line pressure instability or no pressure rise under load.
Motorcraft Mercon LV ATF, changed at the same time you install this part.
No. The 6F35 is a related but different Ford six-speed transaxle used in the Escape, Fusion and Lincoln MKZ. See our 6F35 transmission problems guide if that's your vehicle.
Yes - clear the stored codes and run the TCM's adaptive relearn so shift timing is tuned to the new valve body instead of the worn one.
