4R100 Pump 1999-2003, remanufactured and ready to install. Fits the 4R100. Ships fast from the USA.
The 1999-2003 window covers the first Super Duty generation and the heart of 7.3L Power Stroke production, plus the 2000-up Excursion, E-Series vans and F-53 motorhome chassis with the 5.4L and 6.8L V10. These trucks tow and haul, and when the 4R100 starts slipping in every gear, hesitating into drive or reverse, or whining with engine speed, the front pump is often worn out. This remanufactured 4R100 pump is listed for 1999-2003 and replaces the whole assembly.
The pump turns with the torque converter and supplies all hydraulic pressure and flow in the transmission. In the 4R100 it also carries the converter clutch control valve and supports the coast clutch drum through its stator support. Ford built 4R100 pumps on the common F81P body and cover castings introduced for 1998, but the hardware inside varies. Transmission Digest explains that the pump came in two converter clutch versions, on-off and PWM, and that the stator support faces the coast clutch drum journal forward to carry the load of the PTO gear used on some trucks. Early PTO pumps even used a bearing in the stator support bore before Ford went back to a bushing.
Check line pressure with a gauge first. Low pressure in every range points at the pump or regulator, but on these trucks the electronic pressure control circuit has to be cleared too; our EPC solenoid guide covers the 4R100 as well. Read stored codes and check the solenoid block resistance as shown in our E4OD and 4R100 common problems guide. A pump that is about to fail usually leaves clues in the pan: bronze bushing material and fine aluminum.
This pump is listed for the 1999-2003 4R100. Two checks matter more than the model year. First, converter clutch type: look into the TCC valve bore on your old pump. A PWM pump has its end plug only about a quarter inch below the cover edge because it is a sleeve with a valve inside; an on-off pump's plug sits more than an inch down. All diesel trucks and most gas trucks used PWM. Second, PTO or non-PTO: the coast clutch drum changed during these years, and the drum and pump stack together. Match your solenoid block to the pump design. Transmission Digest also notes that Ford discontinued the on-off pump and that an E4OD pump can stand in for it with a stator support change. If you are not sure which you have, send us the year and VIN. Other years, such as the 1998-2005 4R100 pump, are listed separately, and the full lineup is on the E4OD and 4R100 collection page.
For how this pump differs from the earlier unit, read 4R100 vs E4OD differences.
| Fits | 4R100 1999-2003 |
| Part type | Pump |
| Condition | Remanufactured |
| 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.
Check your old pump. On a PWM pump the TCC valve end plug sits about 1/4 inch below the pump cover edge; on an on-off pump it sits more than an inch down. All diesels and most gas 4R100s used PWM. Send us your year and VIN if you want us to confirm.
Yes. PTO and non-PTO 4R100s used different coast clutch drums, and the drum rides on the pump's stator support. Match the setup you have.
Only in an on-off lockup 4R100, and only with the stator support changed, according to Transmission Digest. A PWM truck needs a PWM pump.
MERCON V. Prime the pump with it before first start and check the level at operating temperature after a test drive.
Common causes are clutch or converter debris, a worn converter hub, low fluid and heat from towing. Fix the cause and flush the cooler, or the new pump will wear the same way.
