4R100 Clutch Drum 1998, remanufactured and ready to install. Fits the 4R100. Ships fast from the USA.
The 1998 model year was the first for the Ford 4R100, the redesigned successor to the E4OD in heavy-duty F-Series pickups and E-Series vans with the 7.3L Power Stroke, 5.4L or 6.8L V10. If your first-year 4R100 slips in a gear, burns clutches or came back from an overhaul with a dead range, a damaged drum is often what is left behind. This remanufactured clutch drum is listed for 1998 4R100 applications.
The 4R100 kept the E4OD's overdrive-plus-main-box layout but arrived with new pump castings marked F81P, separate pump versions for PWM and on-off converter clutch control, and new coast clutch drums. Those 1998 coast drums were stamped steel instead of cast iron, with wider teeth on the coast clutch steels. The non-PTO version, YC3Z-7G387AA, rode on a bushing set toward the front and used two frictions with a thrust washer against the pump. The PTO version, YC3Z-7G387BA, carried a large gear, three frictions and a ball bearing instead of a bushing, with no thrust washer. Ford later replaced both with bearing-supported 1C3Z drums, which is why a 1998 truck that has already been rebuilt may not have its original drum anymore.
Every clutch pack in the 4R100 is housed in a drum that holds the plates, forms the piston bore and passes apply oil across sealing rings at its hub. Heat from towing, low lube flow and worn bushings are the usual killers. Once a ring land scores or the drum cracks, apply pressure leaks, the piston loses clamping force, and the plates slip and burn.
A failed coast clutch or EPC solenoid, low line pressure or a corroded case connector can all mimic hard-part slip on these trucks. Our shift solenoid guide and common problems guide cover the electrical and pressure checks. If those pass and the pan is full of friction material, air-check each clutch circuit during teardown; the circuit that leaks at the drum tells you which drum to replace.
This listing is a remanufactured 4R100 clutch drum for 1998 and does not name the drum position, so confirm what you need before ordering. For the coast drum, match PTO or non-PTO, bushing or bearing support and friction count to the drum you removed; a bushing drum and a bearing drum stack up differently and are not swapped without the matching thrust parts. Send your VIN and the drum you are replacing and we will confirm it. Later-year drums are on the 4R100 clutch drum 1999-2004 page, and the full family is on the E4OD and 4R100 collection page.
| Fits | 4R100 1998 |
| Part type | Clutch Drum |
| 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.
Not always. Ford revised the coast clutch drums after 1998, moving the non-PTO drum from a bushing to a bearing and updating the PTO drum. Match support style, friction count and gear to the drum you removed.
It is listed as a 1998 4R100 clutch drum without the position named. Send us the drum you are replacing and your VIN and we will confirm the match before it ships.
Only if it is a bushing-supported coast drum. The 1998 non-PTO coast drum uses a non-selective thrust washer against the pump; bearing-supported drums do not use one.
Heat from towing, low lube flow to the front of the unit, worn bushings and leaking sealing ring lands. Those let apply pressure escape so the pack slips and burns.
Mercon V ATF, with a new filter and a flushed cooler so old debris does not wear the fresh parts.
