4R55E Overhaul Kit 1985-1995, new and ready to install. Fits the 4R55E. Ships fast from the USA.
Owners of a 4.0L Explorer, Ranger, Aerostar or Mazda Navajo from the early 1990s often search for a 4R55E rebuild kit, but before the 1995 model year those trucks left the factory with the A4LD. The 4R55E is the heavy-duty electronic version Ford built from it. This listing is the Precision KP53900EV overhaul kit catalogued for 1985-1995 units of that family. It is a gasket and seal set: case and pan gaskets, O-rings, piston and lip seals, a Viton front metal-clad seal, Viton governor rings, two sets of aftermarket center support rings and a converter clutch filter. Frictions, steels, bands and the pan filter are not included.
The 4.0L V6 asked a lot of the A4LD. Explorers and Aerostars were heavy, many towed, and the transmission ran hot, which is hard on rubber seals and sealing rings. In the A4LD the computer controls the converter clutch and the 3-4 shift, while the lower shifts are made hydraulically with a governor, so leaking governor rings move shift points and leaking center support rings starve the clutches that the center support feeds. Ford answered the load problem in 1995 with the 4R55E, a fully electronic version rated for 550 ft-lb after converter multiplication, and replaced it with the five-speed 5R55E during 1997. On an electronic 4R55E the governor rings in this kit are simply not used.
Pull the pan first. If the magnet holds only fine gray sludge, seals are a reasonable repair; if you see burned friction material or metal, plan on frictions and hard parts as well. A pressure gauge on the line tap will show a circuit losing pressure, and our line pressure testing guide walks through it. If the leak is only at the front, read converter hub and pump bushing wear first, because a worn hub will chew up a new front seal.
The kit is catalogued for A4LD transmissions from 1985 to 1994 plus units carried into 1995. On this page that means the 4.0L trucks: the 1991-1994 Explorer and Mazda Navajo, the Ranger with the 4.0L, and the 4.0L Aerostar. Any 1985-1995 A4LD shares the kit, including 2.3L and 2.9L applications. If your truck has the 1995-1996 electronic 4R55E, the 4R55E 1995-1996 overhaul kit is the closer catalog match. Read the ID tag on the case, or send us the year and VIN, and match the tail seal to your two- or four-wheel-drive housing. Everything else is in our rebuild kits collection.
| Fits | 4R55E 1985-1995 |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
No. Explorers before the 1995 model year used the A4LD. The 4R55E arrived for 1995 as its fully electronic heavy-duty version. This kit is catalogued for the A4LD from 1985 to 1995, so it is the one for your truck.
Gaskets, O-rings, piston and lip seals, a Viton front metal-clad seal, Viton governor rings, two sets of aftermarket center support rings and a converter clutch filter. It does not include frictions, steels, bands or a pan filter.
The 1995-1996 electronic units are catalogued under a separate overhaul kit, which is the better match. The governor rings in this kit are not used on an electronic 4R55E.
The front seal can be replaced with the transmission out and the converter removed. Check the converter hub for a groove or polish wear first, because a worn hub will cut the new seal.
Use the automatic transmission fluid printed on the dipstick or in the owner guide, and check the level at operating temperature.
