E4OD Pump, new other (see details) and ready to install. Fits the E4OD. Ships fast from the USA.
The E4OD went into Ford F-150 through F-350 pickups, Broncos and E-Series vans from 1989 through 1997, and on a high-mileage truck the front pump is one of the parts that quietly wears out. Typical signs are a slow pickup into drive or reverse, slipping across all gears when hot, a whine that tracks engine speed, or an off-idle stumble that turns out to be the lockup clutch dragging. This E4OD pump is a complete front pump assembly in new other condition, ready to bolt in once you have matched it to your unit.
The pump is turned by the converter hub and supplies all line pressure, converter charge, cooler flow and lube oil. Its body also contains the main regulator, the converter regulator and the E4OD converter clutch control valve. Sonnax's article on 4R100 flow issues explains a problem the E4OD made famous: at low engine speed a weak pump could not supply enough converter release oil, so the lockup clutch dragged on the cover. Shops at the time chased it as an engine driveability problem, with off-idle hesitation, stumble or what felt like a lean condition, before finding the real cause. Restoring pump volume fixed it.
Check line pressure with a gauge at idle and at stall in drive and reverse. If it is low everywhere, the pump or regulator is the likely cause. On 1995-1997 trucks the EPC solenoid controls line pressure electronically, so test it with our EPC solenoid guide before buying hard parts. For shift and lockup faults that may be electrical, start with our E4OD shift solenoid guide. A pan full of bronze bushing material and aluminum is a strong sign the pump is done.
This listing is for the Ford E4OD and does not state a specific year range, so matching is on you before you install. E4OD pumps were made in more than one casting. Sonnax lists E9, F1, F5 and F8 pump castings, and notes that its replacement pump gear set fits only the 1995-and-later F5 and F8 pumps, so early and late pumps are not identical inside. The 1995 changeover also brought a new solenoid block, and the pump has to suit the rest of your unit. Read the casting number on your old pump body and compare it with this pump, or send us your year and VIN and we will check it for you. Year-specific options include the 1989-1997 E4OD pump, and the complete lineup is on the E4OD and 4R100 collection page.
For the full list of weak points in this transmission, see E4OD common problems and fixes.
| Fits | E4OD |
| Part type | Pump |
| Condition | New Other (See Details) |
| 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.
The listing does not name a year range. E4OD pumps came in E9, F1, F5 and F8 castings and changed in 1995, so compare the casting number on your old pump or send us your year and VIN before you order.
Yes. Sonnax describes E4OD lockup clutches dragging at low RPM because a weak pump could not supply enough release oil, which drivers felt as hesitation or stumble. A worn main regulator valve can also cause a stumble or stall on reverse engagement.
Not as a simple swap. The converter clutch control valve differs between the E4OD and the 4R100 pump bodies. Stay with an E4OD pump that matches your casting.
MERCON V. Prime the new pump with it before the first start.
A front seal, pump gasket and O-ring at minimum, plus a cooler flush. Replace the converter if its hub is scored, and fix any clutch or band damage while the unit is out.
