4R100 Solenoid Kit 1998-2004, remanufactured and ready to install. Fits the 4R100. Ships fast from the USA.
Across its full 1998-2004 run, the 4R100 sat behind the 7.3L Power Stroke, the 5.4L and the 6.8L V10 in Super Duty pickups, Excursions and E-Series vans, and on a high-mileage tow rig the solenoid pack is one of the first electrical parts to give out. If your truck has lost overdrive, starts in 2nd, flares between gears, or flashes the overdrive light with a stored solenoid or EPC code, this remanufactured 4R100 solenoid kit replaces the complete block that runs every shift.
The block bolts to the bottom of the valve body and holds five solenoids: shift solenoids A and B, the coast clutch solenoid, the torque converter clutch solenoid and the EPC solenoid. The computer grounds A and B in combinations to select each gear, fires the coast clutch solenoid for engine braking in manual ranges, and varies current to the EPC solenoid to set line pressure for the load. EPC is built to fail safe at maximum pressure, which is why a dead EPC circuit feels like harsh, banging shifts rather than slipping. All of the solenoid feed oil passes through the solenoid regulator valve first, so the pack and that valve work as a team.
A shift-error code such as P0781-P0783 means the computer did not see the expected speed change, and that can be a worn clutch just as easily as a solenoid, so do not buy on that code alone. Start at the case connector: corrosion, loose pins and broken lock tabs are common on this family and cause repeat codes on new packs. Then ohm the block with the key off: about 20-30 ohms on each shift, coast and on/off converter solenoid, 3-5 ohms on EPC. An EPC complaint that only appears under load may also be a worn line pressure modulator sleeve in the valve body. The full test procedure is in our shift solenoid guide, and the valve body testing guide covers the bore wear that mimics a bad pack.
This kit is listed for the 4R100 from 1998 through 2004. The photo shows the solenoid block with a filter and pan gasket, marked 2WD, so four-wheel-drive owners should confirm the filter before ordering. The bigger issue across these years is converter clutch control: Ford built the 4R100 with either PWM or on/off lockup, with all diesels and most gas trucks on PWM, and the solenoid block must match the pump's TCC valve. Checking the TCC valve end-plug depth on the pump is the reliable test. Super Duty diesels moved to a different five-speed when the 6.0L arrived, so a late 4R100 is usually behind a gas engine or in a van. Send us your year and VIN if you need a second check, and see every E4OD and 4R100 part on the E4OD/4R100 collection page.
On a truck that has been slipping, inspect the fluid for friction material. Worn clutches are the next stop, and a 4R100 master rebuild kit or a replacement 4R100 valve body covers the hydraulic side. Our common problems guide lists the other known 4R100 failure points.
| Fits | 4R100 1998-2004 |
| Part type | Solenoid Kit |
| 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.
No single block covers both. The solenoid block must match the converter clutch design in your pump. Diesels and most gas trucks used PWM, a few gas models used on/off. Check the TCC valve end-plug depth or send us your VIN.
Only if the EPC solenoid itself has failed. P1747 can also come from wiring or a failed computer driver, so check EPC resistance (about 3-5 ohms) and the circuit back to the computer before replacing the pack.
If the new pack ohms correctly and there are no circuit codes, the solenoid regulator valve bore in the valve body is the likely cause. It feeds oil to every solenoid, and a worn bore starves them when hot.
A new filter, pan gasket and connector O-ring at minimum, and clean or replace the solenoid screen in the spacer plate. Refill with Mercon V.
The kit shown is marked 2WD. The solenoid block itself is the same part, but the included filter differs, so confirm with your VIN before ordering for a four-wheel-drive truck.
