4R100 Solenoid Kit 1998-2005, new and ready to install. Fits the 4R100. Ships fast from the USA.
If your 4R100 Super Duty, Excursion or E-Series van is launching in 2nd, refusing overdrive, banging from 1st straight to 4th, or sitting in limp mode with a shift solenoid code, this new 4R100 solenoid kit for 1998-2005 is the part most rebuilders reach for once the pack has tested bad. As pictured, the solenoid block comes with a pan gasket and filter, so the pan only has to come down once.
The 4R100 is Ford's 1998-up update of the E4OD, and it keeps the same two-solenoid shift logic. Shift solenoid 1 (A) and shift solenoid 2 (B) share a key-on power feed, and the PCM grounds each one to energize it. 1st is SS1 on, 2nd is both on, 3rd is SS2 on, and 4th is both off. The same block also carries the coast clutch solenoid, the converter clutch solenoid and the EPC (line pressure) solenoid. Because every solenoid is used in two gears, one stuck solenoid swaps pairs of gears instead of killing just one, and losing power to the whole block drops the truck into 4th in Drive.
Unplug the case connector first. This family is known for corroded pins, loose pin fit and a harness lock tab that breaks easily, and a new pack will not cure a broken tab. Then ohm the block at its connector, key off: SS1, SS2, the coast clutch and TCC solenoids should each read 20-30 ohms against the shared feed pin, and EPC should read 3.0-5.0 ohms. Our E4OD and 4R100 shift solenoid test guide walks through the pin pairs, the road-test gear patterns and how to force shifts by hand. If the complaint is harsh shifts or loss of power with P1747, read the EPC solenoid symptoms guide before blaming the shift solenoids. A truck that only starts in 2nd or 3rd when hot, with a pack that ohms good, usually has a worn solenoid regulator valve bore, which is a valve body repair rather than a pack.
This listing covers 4R100 transmissions from 1998-2005. The 4R100 was built two ways: with PWM converter clutch control (all diesel units and some gas) and with on-off lockup (a few gas applications). The solenoid block has to match the TCC valve in the pump, not just the model year, so compare your old block's connector and part number with the photos before ordering, or send us your year and VIN and we will check it. If you are not sure whether you have an E4OD or a 4R100, our 4R100 vs E4OD guide covers the PTO port and pump checks. Everything else for this unit is on the E4OD/4R100 parts page.
| Fits | 4R100 1998-2005 |
| Part type | Solenoid Kit |
| Condition | New |
| 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 listed for 1998-2005 4R100 transmissions. The block must match your pump's converter clutch design: PWM (all diesel and some gas units) or on-off. Compare the connector and part number on your old block, or send your year and VIN before ordering.
Only if the TCC control matches. A 1995-up non-PWM block suits on-off 4R100 units, while PWM 4R100 units need the PWM block. Installing the wrong one gives converter clutch problems even though it bolts on.
P0750 and P0755 are the solenoid A and B circuit codes, P1714 and P1715 flag mechanical faults, and P1747 relates to the EPC circuit. P0781-P0783 shift errors can come from a solenoid or from a slipping clutch, so test before replacing.
Mercon V ATF. Refill after installing the new filter and pan gasket, then check the level hot in Park.
Clear the codes and drive the truck through every gear under normal load so the PCM adapts shift timing. Shifts may feel slightly different for the first few drive cycles.
Inspect the case connector and harness lock tab. Corroded or loose pins and a broken tab are common on this family and will bring the same codes back on a brand-new pack.
