4R100 Clutch Module 1998-2004, new and ready to install. Fits the 4R100. Ships fast from the USA.
A 1998-2004 Ford heavy-duty pickup, Excursion or E-Series van with the 4R100 that slips on the 2-3 shift under a trailer, flares into overdrive on a grade, or comes back from a long tow with dark, burnt-smelling fluid usually has the same story inside: glazed or burnt friction plates. This 4R100 clutch module is a complete friction plate kit for 1998-and-up 4R100 units - 24 new frictions in six sizes - so every multi-disc pack in the transmission can be relined during a rebuild instead of reusing tired originals.
ATSG's 4R100 service manual lists seven friction apply elements: the intermediate band plus six multi-disc clutches - coast, overdrive, intermediate, direct, forward and low/reverse - working with an overdrive roller clutch, an intermediate sprag and a low roller clutch. Each multi-disc pack is a stack of lined friction plates splined to one member and steel plates splined to another. When line pressure strokes the piston, the stack clamps and locks those members together to make the gear. The six friction sizes in this kit line up with those six packs: 3 x 36100E, 3 x 36104E, 5 x 36106E, 5 x 36108C, 6 x 36110EA and 2 x 36112. Steel plates are not part of the listed contents, so plan to reuse yours if they are flat and unscored or replace them separately.
The 4R100 has plenty of electrical faults that feel like a slipping clutch, so rule those out before you pull the unit. A worn solenoid pack, a broken connector lock tab or a weak EPC circuit can all cause soft shifts or flare. Start with codes and the tests in our E4OD/4R100 shift solenoid guide, and check the EPC side with our EPC solenoid symptoms guide. Then put a gauge on line pressure: Sonnax documents low pump volume at low rpm on the 4R100, which starves the converter and lube circuits. If pressure is correct and the slip still follows one range, the friction pack for that range is burnt and a rebuild with fresh frictions is the fix.
This kit is listed for 1998-2004 4R100 transmissions - Ford heavy-duty F-Series pickups including the Super Duty, the Excursion and E-Series vans behind the 7.3L Power Stroke, 5.4L and 6.8L V10. Be aware that the 4R100 is model sensitive inside. ATSG shows three coast clutch housings, a cast-iron drum carried over from the E4OD and two stamped-steel versions, and that change also swaps the overdrive frictions between 64-tooth and 32-tooth designs. Forward and reverse plate counts vary by model too. Count the teeth and plates you remove and compare them to the kit before you start assembly, or send us your year, engine and VIN and we will check it. The earlier E4OD units are covered on our E4OD and 4R100 parts page, and the 4R100 vs E4OD comparison explains where the two differ.
| Fits | 4R100 1998-2004 |
| Part type | Clutch Module |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. The listed contents are 24 friction plates in six sizes. Reuse your steels if they are flat, free of heat bluing and unscored, or replace them separately when they show heat damage.
It is listed for the 1998-2004 4R100. The E4OD shares much of the design, but the coast clutch and overdrive parts changed, so E4OD owners should use an E4OD friction kit or check tooth and plate counts against their unit first.
Look at the coast clutch housing. ATSG shows a cast-iron housing and two stamped-steel versions, and the overdrive frictions changed between 64-tooth and 32-tooth designs with them. Count the teeth on the plates you remove and compare.
ATSG calls for Motorcraft Mercon multi-purpose ATF or an equivalent Mercon fluid in the 4R100; Mercon V is the common service fluid for these trucks today. Check the level hot, 150-170 F, at idle in Park.
Only if the slip is electrical. If line pressure tests good and the slip stays in one range, the frictions are burnt and need replacing. A new solenoid pack on burnt clutches will not stop the slip.
ATSG lists 0.030-0.055 inch for the 4R100 forward clutch, set with a selective snap ring and checked with a feeler gauge between the snap ring and the backing plate.
