4R100 Pump 1995, new and ready to install. Fits the 4R100. Ships fast from the USA.
Searching for a 4R100 pump for a Super Duty, Excursion or E-Series van and landed on a 1995 listing? Here is what this part is and why the year looks odd. The 4R100 did not exist in 1995; Ford built the E4OD that year and renamed the updated unit 4R100 for 1998. What carries over is the pump gear design. The part pictured is the 10-lobe pump gear that Ford introduced with the 1995 F5 pump casting, and Sonnax lists the same 10-lobe pattern for 4R100 pumps. It is not a complete pump body. It is for a rebuild where the pump body and cover are good and the gears are worn, causing slow engagement, slipping when hot and a whine that rises with engine speed.
The converter hub drives the inner gear, and the inner gear turns the outer gear in the pump pocket. Fluid trapped between the lobes is pushed to the pressure side to make line pressure, feed the converter and cooler, and lube the geartrain. In a 4R100 that oil also feeds the converter clutch circuit, and on many diesel and some gas models that circuit is PWM-controlled. Worn gears leak oil back to suction, so pressure and volume drop, most noticeably at idle, at low RPM and when the fluid is hot.
Transmission Digest explains that in 1998 Ford moved to a common F81P pump body and cover for the E4OD, the 4R100 with on-off lockup and the 4R100 with PWM lockup. The gear set rides in that pocket either way; the differences between pump assemblies are in the stator support and the converter clutch valve, not the gears.
Check the fluid level hot, then gauge line pressure at idle and stall in every range. Low pressure everywhere points at the pump or main regulator; a single weak range points to a leak in that circuit. A failed pressure control solenoid or computer driver can mimic a weak pump, so work through the EPC solenoid symptoms guide first. If you are deciding between E4OD and 4R100 hard parts, read 4R100 vs E4OD differences.
The listing year is 1995 because that is when the 10-lobe gear arrived. Sonnax lists 10-lobe gears for all 4R100 pumps and for 1995-later F5 and F8 E4OD pumps. Before ordering, pull your pump, confirm an F5 or F81P (F8) casting, and count the lobes on the outer gear: 10 is correct. An early E9 or F1 pump has 11 lobes and needs a different pump, not these gears. If you are unsure, send your year and VIN and we will help you match it. All of our parts for this unit are on the E4OD and 4R100 parts page.
| Fits | 4R100 1995 |
| Part type | Pump |
| 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.
The 4R100 arrived for 1998 as the updated E4OD. The year on this listing reflects the 1995 introduction of the 10-lobe pump gear in the F5 E4OD pump, the same gear pattern Sonnax lists for 4R100 pumps.
No. The part pictured is the pump gear. If your pump body, cover or stator support is damaged, order a complete pump assembly instead.
Not for the gears. PWM and on-off lockup pumps differ in the converter clutch valve in the pump cover, so keep your original cover and use the solenoid block that matches it.
Mercon V ATF. Prime the pump with fluid during assembly and check level hot after the first drive.
The front seal, pump bushing, pump gasket and O-ring, and the converter if its hub is worn. A pump job is also the right time to reseal the unit with an overhaul kit.
