4R100 Shift Kit, new and ready to install. Fits the 4R100. Ships fast from the USA.
If your 7.3L Power Stroke, 5.4L or 6.8L V10 Super Duty, Excursion or E-Series van has started flaring into 2nd, slipping into 3rd under a trailer, or setting converter clutch slip codes, the hydraulics in the 4R100 valve body are usually the reason. This is a TransGo reprogramming kit - the heavier-calibration line that sits above TransGo's basic SK E4OD shift kit - and it is meant to go in while the valve body is out for a rebuild or service, so the new clutches you install are not cooked by the same slow, low-pressure apply that wore out the old ones.
The 4R100 is the late version of Ford's E4OD: same four-speed heavy-duty layout, with the computer controlling shift timing and line pressure through the solenoid block and the EPC circuit. What the computer cannot change is the hydraulic side - spring rates, boost valve sizes and the oil feed to the converter and lube circuit. TransGo's reprogramming kits for this transmission replace the pressure regulator boost valve, 1-2 shift valve spring and line regulator valve, add line-to-lube parts that raise cooler and converter feed, and include a calibration plate so shift firmness can be set for the truck's job. They also carry hard parts that fail in these units: a high-temperature direct clutch seal, a heavy-duty coast clutch snap ring, an overdrive housing spiral lock snap ring and an updated direct clutch outer seal.
A shift kit corrects hydraulic calibration; it does not fix a shorted solenoid, a corroded case connector or a failed EPC driver in the computer. Scan for codes first. Solenoid circuit codes point at the solenoid block or wiring, which our shift solenoid symptoms guide walks through. If the complaint is harsh or soft shifts with no electrical codes, work through our E4OD harsh shift causes guide, which covers the worn line pressure modulator and boost sleeves that leak EPC oil - wear a kit is designed to correct. Burnt fluid and debris in the pan mean the clutches are already damaged and the kit should go in with a rebuild.
TransGo lists its reprogramming kits as fitting all E4OD and 4R100 transmissions from 1989 on, so this kit works on 1998-2004 4R100 trucks and on earlier E4OD units. TransGo sells two reprogramming kits here: the E4OD-HD2, and the 4R100-HD2 Tugger, which adds a quick-fill valve and more low clutch holding pressure in manual 1st for downhill engine and exhaust braking. If you run an exhaust brake and need the Tugger calibration specifically, send us your year and VIN before ordering and we will confirm which kit ships. Every other E4OD/4R100 option we stock is in the E4OD/4R100 parts collection.
Plan on valve body removal at minimum. The seal and snap ring upgrades in the kit need the transmission on the bench, so the best time to install it is during an overhaul with a 4R100 master rebuild kit. Follow TransGo's printed instructions in order, lay out the parts you remove so nothing gets swapped, and use the calibration plate to set firmness for how the truck is used - a daily-driven Excursion does not need the same apply as a dually that tows every weekend. Clean the valve body, check every bore for wear before reassembly, and refill with Mercon V. Because these trucks run hot under load, adding a transmission cooler in the same job protects the new clutches. Clear codes after the install and road test empty, then loaded.
| Fits | 4R100 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. TransGo lists its reprogramming kits as fitting all E4OD and 4R100 transmissions from 1989 on, which includes the 1998-2004 4R100 in Super Duty, Excursion and E-Series. Send your year and VIN if you need a specific kit version confirmed.
The valve body calibration parts can go in with the transmission in the vehicle, but the direct clutch seal and snap ring upgrades need the unit on the bench. Most people install the full kit during a rebuild.
TransGo lists converter slide and shudder and codes 628, P1740 and P1744 among the problems these kits correct, but a kit will not fix a failed converter or a solenoid fault. Check the solenoids and wiring first.
The kit includes a calibration plate so firmness can be adjusted. The goal is a short, firm shift that reduces clutch slip time, not a bang into gear.
Mercon V ATF. Change the filter at the same time so debris from the old clutches does not circulate through the newly calibrated valve body.
If the clutches have worn, install it with a full rebuild kit. On towing trucks, an added transmission cooler is worth doing in the same job.
