6F50 Pump 2007-2019

This listing is the genuine Ford front pump support for the 6F50 and 6F55 six-speed transaxles, Ford service number BT4Z-7A108-A. It is a new part, not a pull-out. It fits the V6 Edge, Explorer, Flex and Taurus, along with the Lincoln crossovers and sedans built on the same transaxle, from 2007 through 2019. Read this before ordering: it is the support, Ford part 7A108, not the complete pump with vanes and rotor. Buyers usually need it after a teardown finds a scored stator shaft, a worn bushing journal, or a support damaged by a failed converter or a seized drive.

What the front pump support does in a 6F50

The 6F50 was developed alongside GM's 6T70, and Sonnax describes the pair as using a remote-mounted, off-axis, chain-driven vane oil pump. So the pump does not sit directly on the converter hub like older Ford pumps. The front support sits where the converter enters the case. It carries the splined stator shaft that holds the converter stator, and its passages and steel tubes route converter feed, TCC apply and release, and lube oil between the case, the pump circuit and the converter. If the stator splines strip, a sealing surface wears, or a tube cracks, the converter loses charge pressure and the TCC stops behaving properly, even if the pump itself is fine.

Symptoms that point to the front support

• Torque converter clutch slip or shudder at steady cruise, often with a TCC slip code stored
• Overheating fluid or poor lube flow from converter oil leaking past a worn journal or tube
• No drive, or a loud whir with no engagement, if the stator shaft splines strip and the stator freewheels
• Low line pressure and burned clutches when worn sealing surfaces bleed pressure, the pattern Sonnax lists for the 6F50/6T70 pressure regulator circuit
• Metal debris from the converter area in the pan after a converter failure

How to confirm it is the support

Use a scan tool to check TCC slip and commanded versus actual line pressure, then rule out the valve body and solenoids, which fail more often on these units than hard parts. Our Ford six-speed transmission problems guide walks through the diagnosis. With the transmission apart, inspect the stator shaft splines, the bushing journals, and the tubes for cracks or loose fittings. Also check that the converter hub did not gall the support. If the support is damaged, replace it. Do not reuse a damaged support with a new converter.

Fitment

BT4Z-7A108-A is Ford's current number and supersedes 7T4Z-7A108-C, 8A8Z-7A108-A and 8A8Z-7A108-B, so it replaces the support used since the 6F50 launched in the 2007 Edge and MKX. The application notes for this part read "with 6F50 6-speed automatic transmission." Typical applications include the Edge, Explorer, Flex and Taurus, and the Lincoln MKX, MKT and MKS. Some of those models also used the smaller 6F35 depending on engine, and this part does not fit the 6F35. Check the transmission code on your door tag (Sonnax lists J for 6F50 and C for 6F55), or send us your year and VIN to confirm. Related parts are on the Ford six-speed collection page.

Install notes

• Transfer or replace the bushings and seals on the support and check the stator shaft splines against your converter before final assembly.
• Flush the cooler and lines if the support failed because of converter or clutch debris.
• Torque the support bolts evenly in a cross pattern so the tubes seat without stress.
• Because this is a teardown job, most buyers add a 6F50 overhaul kit. If your pump rotor or vanes are damaged, see our 6F50 pump for 2013-2019.
• Fill with Mercon LV, which Ford specifies for the 6F50 and 6F55, then clear adaptives and run the relearn.

Is this the complete 6F50 oil pump?

No. It is the genuine Ford front pump support, BT4Z-7A108-A, which carries the stator shaft and the converter oil passages. The 6F50 vane pump is a separate, chain-driven assembly mounted off-axis.

What part numbers does it replace?

Ford lists BT4Z-7A108-A as replacing 7T4Z-7A108-C, 8A8Z-7A108-A and 8A8Z-7A108-B.

Does it fit my 2.5L Escape or Fusion?

No. Four-cylinder Escape and Fusion models use the 6F35, which needs different parts. This support is for vehicles built with the 6F50 or 6F55, such as the V6 Edge, Explorer, Flex, Taurus and the Lincoln MKX, MKT and MKS.

Can a bad front support cause converter clutch problems?

Yes. Converter feed and TCC apply and release oil pass through the support. A worn journal or cracked tube can cause TCC slip, shudder and overheating.

What fluid does the 6F50 take?

Ford specifies Mercon LV for the 6F50 and 6F55. After the repair, clear the adaptive tables and run the relearn.

• Ford 6F35 Transmission Problems: Real Causes and the Fixes That Last