5R110W Pump 2003-2004, remanufactured and ready to install. Fits the 5R110W. Ships fast from the USA.
Owners of early TorqShift trucks, the 2003 and 2004 F-250 through F-550 Super Duty and Excursion, tend to find this page after a long, lazy engagement into gear, a slip that is everywhere instead of on one shift, or a lockup complaint that will not go away. Those all trace back to line pressure, and on a 2003-2004 5R110W the pump is where that pressure is made and regulated. This remanufactured pump is listed for the 2003-2004 years.
The converter hub turns the pump, and the pump feeds the solenoid body, the clutches, the converter and the cooler. The 5R110W puts five valves in the pump assembly, including the main pressure regulator, the converter clutch control valve and the converter pressure limit valve, so this one part touches line pressure, lockup and lubrication. The 2003-2004 trucks used the first-generation pump. Sonnax reports that Ford redesigned it for 2005, and low pressure was one of the reasons: the early main pressure regulator valve and softer cover casting are where wear shows up first. That is why a tired original pump on an early truck is such a common find.
Gauge line pressure first. Early solenoid bodies carry five pressure switches with rubber boots that can rupture and bleed off solenoid control pressure, which feels like a mechanical slip with no electrical code. Our 5R110 solenoid testing guide walks through those checks. If pressure is low across all ranges, plan on pump work, and read the pressure regulator bore section of the 5R110 rebuild wear points guide before you open it.
This pump is listed for 2003-2004 5R110W transmissions. The 5R110W arrived in 2003 with the 6.0L Power Stroke; early 2003 trucks with the 7.3L diesel used the older 4R100 and do not take this part. Sonnax identifies the first-generation pump by casting numbers RF3C3P-7B324-AA or -AB on the front of the body and rear of the cover, while later pumps read RF5C3P-7B324 with an Al11Si3Cu mark on the cover. Check those numbers on your old pump. Early trucks also used the external bypass cooler filter, so a non-bypass 2008-style pump is the wrong choice here. If in doubt, send us your year and VIN. The full lineup is on our 5R110 TorqShift parts page.
| Fits | 5R110W 2003-2004 |
| Part type | Pump |
| Condition | Remanufactured |
| Brand | OEM |
| Reference | F250 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
This listing is for the 2003-2004 first-generation design. Ford's later bypass service pump is noted as retrofitting to 2003, but a 2008-style non-bypass pump must not go on a truck with the external bypass filter. Send your VIN if you want to cross over.
No. Early 2003 trucks with the 7.3L used the 4R100. This pump is for the 5R110W, which came with the 6.0L and the gas engines.
First-generation pumps have RF3C3P-7B324-AA or -AB cast on the front of the body and rear of the cover. Later pumps read RF5C3P-7B324 and carry an Al11Si3Cu mark on the cover.
Wear in the main pressure regulator valve bore is the common cause. It drops line pressure and cuts converter and cooler flow at the same time, which is why lockup complaints often come with it.
Mercon SP, or Mercon LV, which Ford authorizes for complete refill and top-off on this transmission. Mercon and Mercon V are not acceptable.
