4R100 Shift Kit 1989, new and ready to install. Fits the 4R100. Ships fast from the USA.
Searching for a shift kit for the 4R100 behind a 7.3L Power Stroke, 5.4L or 6.8L V10 in a Super Duty pickup, Excursion or E-Series van? This is the TransGo SK E4OD, the entry-level TransGo valve body kit, new in the box. The "1989" in the name is where TransGo's coverage starts, not a sign it only fits a 1989 truck: the same kit is cataloged for every E4OD and 4R100 from 1989 on, and its instructions carry separate steps for the later 4R100 valve bodies, solenoid packs and drums. If your truck shifts long and soft, slides the converter clutch, or delays into reverse once the fluid is hot, this is the budget way to put firmness back into the hydraulics.
The 4R100 is the late version of the E4OD. The computer chooses the gear with two shift solenoids and sets line pressure through the EPC solenoid, but the valve body springs, boost valve and accumulators decide how quickly that pressure actually clamps each clutch. When those are soft or worn, the intermediate and direct clutches spend too long half-applied, and that slip is heat. The SK E4OD swaps the pressure regulator boost valve, inner and outer springs and spring seat, puts new springs in the 2nd, 3rd and 4th accumulators, adds a steel line regulator valve, an EPC relief poppet valve and a tapered orifice bushing, and opens three separator plate feed holes. It also ships with a direct clutch seal and two snap ring upgrades for the bench-rebuild crowd.
A shift kit fixes calibration, not electrical faults or worn bores. Scan first: solenoid circuit codes point at the solenoid pack or the case connector, and our shift solenoid symptoms guide shows how to test them at the connector. If shifts swing between harsh and soft from day to day, worn line pressure modulator or boost sleeves may be leaking EPC oil, which the harsh shift causes guide covers. If the codes are clean and a pressure gauge shows normal line pressure with slow, slipping shifts, the kit is the right repair.
TransGo lists the SK E4OD for all 1989-up E4OD and 4R100 units, which takes in the 1998-and-later 4R100 found in F-250, F-350, F-450 and F-550 Super Duty trucks, the Excursion and E-Series vans. Inside, 4R100 units are not all alike, and the instructions sort them out for you. Look at the separator plate: a plate with hole 2T uses neither ball 1 nor balls 10 and 11. Check the converter clutch valve: a ball visible there means an on/off TCC solenoid, an open hole means PWM. On RFF6 and RFF8 cast valve bodies, TransGo includes a blue 1-2 shift valve spring because the original bends and breaks while still looking fine. If you are unsure which unit is in your truck, send us the year and VIN. Everything else for this transmission is in our E4OD/4R100 parts collection. Building a heavy tow rig instead? The TransGo Tugger HD2 kit is the heavier calibration.
A kit will not save clutches that are already burnt. If the pan shows friction material, pair the kit with a 1998-2004 4R100 clutch module during the rebuild.
| Fits | 4R100 1989 |
| 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. 1989 is where TransGo's coverage begins. The SK E4OD is listed for all E4OD and 4R100 transmissions from 1989 on, including the 1998-and-later 4R100 in Super Duty trucks, the Excursion and E-Series vans.
Read the separator plate. TransGo's instructions say a plate with hole 2T does not use ball 1 or balls 10 and 11; plates with hole 89 or 90 use other combinations shown in the instructions.
Yes. The instructions show how to tell on/off from PWM at the converter clutch valve: a visible ball means on/off, an open hole means PWM. The optional firmer lockup step only applies to units with an orifice cup plug.
The valve body and accumulator parts can go in on the truck. The direct clutch seal and snap ring upgrades need the unit on the bench, so save those for a rebuild.
It firms the shifts and shortens slip time. If very light-throttle 1-2 shifts feel bangy on the road test, TransGo supplies a white line boost spring to soften them.
Mercon V ATF, with a new filter and pan gasket.
