4R100 Clutch Module, new and ready to install. Fits the 4R100. Ships fast from the USA.
The 4R100 behind a 7.3L Power Stroke, 5.4L or 6.8L V10 lives a hard life in Super Duty pickups, Excursions and E-Series vans. Haul a fifth-wheel or run a loaded box van long enough and the clutch packs start to give it away: a 2-3 that hangs, a slip pulling a grade in overdrive, or fluid that comes out dark and smelling burnt. This Raybestos Clutch-Pack module supplies new friction plates for a 4R100 rebuild, so the unit goes back together with fresh lining instead of glazed originals.
Ford built the 4R100 as the updated E4OD, and ATSG's 4R100 manual describes it as four forward speeds from three simple planetary gearsets. Shifts are made by seven friction apply elements - the intermediate band and six multi-disc packs (coast, overdrive, intermediate, direct, forward and low/reverse) - working with three one-way clutches. The PCM controls which packs apply through the shift solenoids, the coast clutch solenoid and the EPC solenoid, which sets line pressure and therefore how hard each piston clamps its pack.
On PTO-equipped trucks the same manual notes 4th gear is disabled during PTO operation in OD, which is worth knowing if a work truck seems to stay in 3rd.
On this transmission a bad solenoid pack, a broken connector lock tab or a weak EPC circuit can feel exactly like a burnt clutch. Pull codes and read our E4OD/4R100 shift solenoid guide before you commit to a teardown. A code like P1747 and a flashing overdrive light point toward the EPC circuit, not the frictions. Sonnax also documents low pump volume at low rpm on the 4R100, so check line pressure at idle and at stall; our valve body testing guide shows where the pressure goes missing. When pressure is good and the slip is in one range only, the pack for that range is burnt.
This module is listed for the Ford 4R100 without a year breakdown. The 4R100 ran from 1998 to 2004, and Ford changed some internals along the way: ATSG lists both 2-plate and 3-plate overdrive clutch stacks, different reverse plate counts by model, and pumps paired with cast-iron or stamped-steel coast clutch drums. Count the frictions in each of your old packs, or send us your year, VIN and the tag on the case so we can confirm the match. For a 1989-1997 E4OD, the E4OD clutch module page covers that unit. All of our 4R100 and E4OD parts are listed on the E4OD/4R100 collection page.
| Fits | 4R100 |
| Part type | Clutch Module |
| Condition | New |
| Brand | Raybestos |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
It is listed for the 4R100, which that truck uses, but plate counts vary by model in the overdrive and low/reverse packs. Count the plates in your old packs or send us your VIN and transmission tag and we will confirm.
The 4R100 is the updated E4OD and much of the hard parts carry over, but some internals changed. Match plate counts and diameters against your teardown rather than assuming the two are interchangeable.
Usually pressure or volume, not the frictions. Low pump volume at low rpm, a weak EPC solenoid, a leaking piston seal, or clearances set too loose will all burn new frictions. Check those before the next rebuild.
Piston seals and sealing rings, the filter, a gasket set, and any heat-damaged steels. Inspect the pump and replace the solenoid pack if it was causing shift complaints.
Refill with MERCON V, check the level hot with the engine running, and clear the codes. Drive gently through all gears for the first miles so the PCM can adapt.
