6F50 Pump 2007

This is a used oil pump assembly for the first-generation Ford 6F50 and 6F55 six-speed transaxle, Ford service number 8A8Z-7A103-A, which replaced the original 7T4Z-7A103-A from the 2007 launch. Ford's parts catalog applies it to the V6 Edge and Lincoln MKX from 2007, the Taurus and Taurus X, Mercury Sable, Flex, Lincoln MKS and MKT, and the 2011-2012 Explorer. If your Edge or Flex is slow to pick up Drive when hot, slips everywhere, or a rebuild came out with no line pressure, this is the part that makes the pressure for the whole unit.

What the oil pump does in a 6F50

Older Ford automatics put the pump right on the converter hub. The 6F50, developed jointly with GM's 6T70, does it differently: Sonnax describes it as an off-axis, chain-driven vane pump. The converter hub turns a drive sprocket, a chain carries that motion to the pump's driven sprocket, and the vane pump sitting off to the side of the case produces the oil for line pressure, the solenoid feed, converter charge and lube. Because the pump turns at engine speed through the chain, wear in the vanes, rotor or pump body shows up as pressure loss everywhere at once rather than in one gear.

Symptoms that point to the pump

• Slow or no engagement into Drive and Reverse, worse once the fluid is hot
• Slipping in every gear, not just one shift
• A whine that rises and falls with engine speed, in Park as well as in gear
• Low line pressure on a gauge, or a no-move condition after an overhaul
• Overheated, darkened fluid from the extra slip

How to confirm before you buy

Put a pressure gauge on the line tap and compare idle and stall readings to the service manual. Low pressure in all ranges that does not respond to the pressure control solenoid points at the pump or its drive, not the clutches. Before blaming the pump itself, check the drive chain: ATSG documented a no-move after a rebuild where the chain had come off the pump gears and the gears were worn, and recommends new pump gears and chain on high-mileage units. If pressure is normal but shifts are harsh or slip in one gear, the cause is more likely a solenoid or clutch; our Ford 6F35 and 6F50 problems guide walks through those.

Fitment

Ford's catalog lists 8A8Z-7A103-A for 2007-2012 Edge and MKX, 2008-2012 Taurus, 2008-2009 Taurus X and Sable, 2009-2012 Flex and MKS, 2010-2012 MKT and 2011-2012 Explorer with the 6F50 or 6F55. The listing also notes the design is shared with GM's 6T70 and 6T75, but GM units carry GM numbers, and later 6F50s use a different Ford number, so compare the casting and part number on your old pump or send us your year and VIN before ordering. Everything we stock for this family is on the 6F35/6F50 collection page.

Install notes

• Inspect the chain and both sprockets whenever the pump is off; a stretched chain or worn teeth will undo a good pump. We carry a new 6F50 pump drive chain and sprocket set.
• Check the converter hub and the front pump support journal for scoring; the 6F50 front pump support is a separate part.
• Use new gaskets and seals, torque the pump bolts evenly to spec, and refill with Mercon LV, the fluid Ford lists for the 6F50 and 6F55.
• Start the engine and check the level hot; the pump has to prime the remote circuit before engagement settles.

Is this the complete pump or just a part of it?

It is the oil pump assembly, Ford base part 7A103, listed as 8A8Z-7A103-A. The drive chain and sprockets and the front pump support are separate parts.

Which vehicles does it fit?

Ford lists it for 2007-2012 Edge and MKX, 2008-2012 Taurus, 2008-2009 Taurus X and Sable, 2009-2012 Flex and MKS, 2010-2012 MKT and 2011-2012 Explorer with the 6F50 or 6F55. Match the number on your old pump or send us your VIN.

Will it fit a GM 6T70 or 6T75?

The 6T70 and 6F50 share a basic pump design, and the listing says it fits both families, but GM units use GM part numbers. Compare your old pump side by side before installing.

What fluid does a 6F50 use?

Mercon LV. Do not mix in older Mercon V fluid.

What else should I replace with the pump?

Inspect or replace the pump drive chain and sprockets, use new gaskets and seals, and check the converter hub and pump support for wear.

Is this part new?

No, it is a used assembly. It is backed by our 1-year warranty.

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