4R100 Sprag Clutch 1999-04, used and ready to install. Fits the 4R100. Ships fast from the USA.
This listing is called a sprag clutch, but what you get is more than the sprag: it is a used, inspected Ford OEM 4R100 direct clutch drum, the 5-clutch heavy-duty version, with the intermediate sprag and outer race already installed and the clutch plates included. It is the part to look for when a 1999-2004 F-250, F-350 or larger Super Duty, Excursion or E-Series van with the 7.3L Power Stroke, 5.4L or 6.8L V10 has burned the direct clutch, slips on the 2-3 shift, or came apart with a cracked drum or a sprag that no longer locks.
ATSG's 4R100 manual lists seven friction elements and three one-way clutches in this transmission. Two of them live on this one housing. The direct clutch pack sits inside the drum, applied by its own piston and return spring. On the front of the drum rides the intermediate sprag, one of the three one-way clutches, with its outer race on top. The sprag locks in one direction and freewheels in the other, which is what lets the 2-3 shift happen without the intermediate and direct clutches fighting each other. A drum that is cracked, has worn piston seal grooves, or carries a sprag that slips will show up in second, third and reverse.
Sonnax groups direct clutch failure, 2-3 slip, 3-2 slip and delayed reverse together, and points to case and center support feed leaks as a common cause. That matters: replacing the drum without fixing the leak burns the new plates too.
Start with codes and fluid. Shift solenoid or EPC faults can mimic a slipping clutch, so rule them out first with our EPC solenoid symptoms guide. Then put a pressure gauge on it. Good line pressure with a 2-3 slip points at the direct clutch circuit, either the drum and its seals or the feed passages. Our E4OD and 4R100 common problems guide covers the high-mileage failure points in this family.
This drum is listed for 1999-2004 4R100 units, and it is also described as fitting the family back to 1989 as a heavy-duty upgrade for diesel and HD use. Do not rely on the year alone. ATSG shows early and late direct drums: the early drum works with the early input sun shell and the number 8A thrust washer, while the late drum works with the late sun shell, which has tabs added and no 8A washer. The late sun shell will retrofit on all models, so if your sun shell is early, plan to replace it. Compare the drum to yours or send us the year and VIN before ordering. More 4R100 hard parts are in our E4OD/4R100 parts collection, and the 4R100 vs E4OD guide explains what interchanges.
Because a failed direct drum usually means debris through the whole unit, most builders install it with a full 4R100 overhaul kit and recalibrate the valve body with a 4R100 shift kit so the new plates are not burned by a slow apply.
| Fits | 4R100 1999-04 |
| Part type | Sprag Clutch |
| Condition | Used |
| 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.
It is the whole direct clutch drum, the 5-clutch version, with the intermediate sprag and outer race installed and the clutch plates included.
It is listed for 1999-2004 Ford 4R100 transmissions in Super Duty pickups, the Excursion and E-Series vans with the 7.3L Power Stroke, 5.4L or 6.8L V10. Early and late drums differ, so match it to your sun shell or send us your year and VIN.
Only with the early drum and early sun shell. ATSG shows that the late sun shell, with tabs added to its slots, supports the direct drum without the 8A washer and retrofits on all models.
No. ATSG specifically warns against using the diode-style intermediate one-way clutch and its drum in the 4R100.
New direct piston lip seals and a full overhaul kit at minimum, and check the case and center support feed seals, since leaks there are a known cause of direct clutch failure.
ATSG lists 0.045-0.081 in. (1.15-2.06 mm), set with the selective snap ring.
