Ford E4OD/4R100 Heavy-Duty Torque Converter, 4-Stud Lockup

This is a remanufactured lockup torque converter for the Ford E4OD and 4R100 automatics behind the gas 5.0L, 5.4L, and 5.8L V8s. It is the 4-stud pattern used on F-250, F-350, F-450, Bronco, and Expedition, so it drops in when the original converter is worn, shuddering, or was contaminated by a burnt transmission. Every unit is rebuilt to OEM spec or better, with the clutch, sprag, and pump hub resurfaced before it goes back together.

Key dimensions: 12.75-inch overall diameter, 11.425-inch bolt circle, 31-spline turbine, 4 mounting studs, and a working lockup clutch. Confirm your bolt pattern before ordering. This is the gas 4-stud converter, not the 6-stud unit used behind the 7.3L Powerstroke diesel, and the two are not interchangeable.

On the bench, prime the converter with fresh ATF, then seat it fully onto the pump. You should feel it drop and rotate through three distinct steps as the hub engages the pump gears and the input and stator splines line up. If it stands proud of the bellhousing it is not seated, and bolting it to the flexplate in that state will crack the pump. Once the trans is mated to the engine, snug the four converter nuts evenly and torque to the factory value.

It solves converter lockup shudder, no-lockup and slipping torque converter clutch complaints, and the metal-fill-and-recontaminate risk of reusing an old converter after a rebuild. New reman assembly with a warranty; ships from the USA, handling in 1-2 business days.