Reseals a Ford 6R80 during an overhaul with the gaskets, seals and Teflon rings that cause leaks, low line pressure and slipping.
A 6R80 that keeps losing fluid, takes a second to pull into Drive once it is hot, or starts slipping under a trailer is very often a sealing problem before it is a clutch problem. This overhaul kit is the reseal half of a 6R80 rebuild: the paper and rubber gaskets, lip seals, O-rings and Teflon sealing rings that harden and shrink after years of heat cycling in an F-150, Expedition, Mustang or Navigator. It is what goes back into the case when the unit is already apart on the bench.
It is a soft-parts kit only. There are no friction plates, steel plates, bushings or filter in the box, so plan on sourcing those separately if your teardown shows burned packs or worn hard parts.
The 6R80 is Ford's version of the ZF 6HP26 six-speed, and like its ZF parent it makes every gear by applying two of five clutch packs at the same time. Each of those packs is fed by a circuit that runs through rotating shafts and drums, and the Teflon rings at those journals are what keep apply oil inside the circuit while the parts spin. When a ring wears or loses its tension, pressure that the valve body commands bleeds back to the sump before it reaches the piston. The clutch then applies late and soft, heats up, and starts to glaze. Lip seals and O-rings do the same job at the pistons, the pump and the case passages. Replacing all of them together restores the hydraulic side of the transmission so the valve body and solenoids are actually controlling what they think they are controlling.
Be careful with that last group. On the 6R80, Ford's own recalls and its extended coverage program point at the molded lead frame for harsh shifts, unexpected downshifts and codes such as P0720 and P0722. A bad lead frame or tired variable bleed solenoids can feel a lot like internal pressure loss.
Check for open recalls on the VIN and scan for codes first. If the electrical side is clean, a line pressure gauge reading taken in each range tells you whether pressure is falling away in specific clutch circuits. Our 6R80 common problems and fixes guide lists the recall and lead frame history, and the F-150 shift problems guide walks through separating a solenoid fault from a mechanical one.
The kit is catalogued for the Ford 6R80 family and listed for: Explorer 4.6L (2005-2010), Expedition 3.5L, 5.0L and 5.4L (2009-2014), F-150 3.5L, 4.6L, 5.0L, 5.4L and 6.2L (2009-2014), Mustang 3.7L and 5.0L (2010-2014), Ranger 2.2L, 2.5L, 3.0L and 3.2L (2010-2014), Transit 3.2L, 3.5L and 3.7L (2014), Everest (2011-2014), Lincoln Navigator 5.0L and 5.4L (2009-2014), and Mazda BT-50 (2012-2014). Some of the earlier V8 Explorer units in that list carry the 6R60 tag rather than 6R80, and Ford made running changes through 2011 and again in 2014, so read the identification tag on your case before ordering. If you are unsure, send us the year and VIN and we will check it. The full lineup of 6R80 parts is on our 6R80 parts page.
Replace rings and seals as each subassembly comes apart, not in a pile at the end, so every ring goes back to the shaft or drum it came from. The Teflon rings stretch on and need a sizing tool to shrink them back down; without one they will not slide into the bore and can shear. Lubricate lip seals and O-rings with clean fluid or assembly gel, never dry. Drop a new 6R80 filter and pan gasket kit in at the same time, and inspect the gearsets while the case is empty; a worn rear set is where the 6R80 planetary comes in. Refill only with Motorcraft MERCON LV, enter the solenoid body strategy if the valve body was changed, and let the PCM relearn over several drive cycles.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is an overhaul (reseal) kit with gaskets, lip seals, O-rings and Teflon sealing rings. If your clutch packs are burned, pair it with frictions and steels or choose a master rebuild kit instead.
Yes, the 2009-2014 F-150 with the 3.5L, 4.6L, 5.0L, 5.4L or 6.2L is in the listed fitment. Confirm the 6R80 tag on the case before ordering, or send us your VIN.
Pan gasket and case connector leaks can be handled in the truck. Leaks from the pump, the internal rings or piston seals require removing the transmission and taking it apart, which is what this kit is for.
Motorcraft MERCON LV. Ford's fluid chart lists MERCON LV for the 6R80 and warns against supplemental additives. Fluid is not included.
Yes. Teflon sealing rings stretch during installation and must be resized with a ring sizing tool before the shaft or drum goes into its bore, otherwise they can cut or roll.
Yes. Clear the transmission adaptive values with a scan tool and drive it through normal shifts. If the valve body was replaced, its solenoid strategy codes also have to be programmed into the PCM first.
