4R100 Sprag Clutch, remanufactured and ready to install. Fits the 4R100. Ships fast from the USA.
If you are rebuilding the 4R100 out of a 7.3L Power Stroke or V10 Ford and the direct clutch is the pack that cooked, this is a ready-to-drop-in answer. Although it is filed under sprag clutch, the part is a remanufactured Ford diesel heavy-duty direct drum that has been updated from 4 clutches to 5, fitted with new friction and steel plates, and supplied with its sprag assembly. It is aimed at Super Duty, Excursion and E-Series owners who tow or haul and want more direct clutch capacity than a 4-plate drum gives, without hunting down a 5-clutch core and plates separately.
The 4R100 carries seven friction elements and three one-way clutches, according to ATSG. The direct clutch is one of the multi-disc packs, and its drum also carries the intermediate sprag, the one-way clutch that holds for second gear and then overruns as the direct clutch takes over on the 2-3 shift. Every 3rd and 4th gear mile, and every reverse engagement, runs through this housing. ATSG notes the number of direct plates is model sensitive, which is why heavy-duty drums with more plates exist: more friction surface spreads the same torque over more area, so each plate runs cooler under a trailer.
Sonnax ties direct clutch burnup, 2-3 and 3-2 slip and delayed reverse to feed leaks at the case and center support, so a new drum alone may not cure a leak. Pressure-test before teardown. Electrical problems in the solenoid pack and case connector are also common on this family and can cause slips, odd shifts or limp mode with nothing worn inside; our shift solenoid symptoms guide shows how to check them. The E4OD and 4R100 common problems guide walks through the rest.
This drum is listed for the Ford 4R100, the later version of the E4OD, as used in Super Duty trucks, the Excursion and E-Series vans. It is described as the bearing-type drum, and Ford built early and late direct drums: per ATSG, the early drum uses the number 8A thrust washer with the early input sun shell, and the late drum pairs with the late, tabbed sun shell and no 8A washer. Match your drum, sun shell and thrust parts to this one, or send us your year and VIN before ordering. See the 4R100 vs E4OD comparison for what crosses over between the two, and our E4OD/4R100 parts collection for the rest of the hard parts.
Pair the new plates with corrected valve body calibration so they are not glazed by a slow apply: the 4R100 shift kit is the usual partner for a towing truck.
| Fits | 4R100 |
| Part type | Sprag Clutch |
| Condition | Remanufactured |
| 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.
A remanufactured 4R100 heavy-duty direct drum, updated from 4 to 5 clutches, with new friction and steel plates and the sprag assembly. Lip seals are not included.
More plates give the direct clutch more friction area to carry the same torque, so it runs cooler and slips less under towing loads. ATSG notes that direct plate count varies by model.
It is listed for the Ford 4R100 in Super Duty trucks, the Excursion and E-Series vans. Early and late drums differ in how they pair with the input sun shell and the 8A thrust washer, so compare yours or send us your year and VIN.
The inner and outer direct clutch piston lip seals, plus any case and center support feed seals that are worn. A master rebuild kit covers them.
Not always. Feed leaks at the case and center support and electrical faults can cause the same complaint, so pressure-test and scan for codes first.
Mercon V ATF.
