5R110W Pump 2003, remanufactured and ready to install. Fits the 5R110W. Ships fast from the USA.
If your 2003 Ford F-250, F-350, Excursion or other early Super Duty with the 5R110W TorqShift is slow to pick up Drive or Reverse, slips in every gear once it is hot, or makes a whine that rises and falls with engine speed, the front pump is the first hard part to look at. This listing is a remanufactured 5R110W front pump assembly for the 2003 launch-year transmission, built so you can bolt in a pump that already has its gears, bushing and sealing surfaces back in spec instead of rebuilding a worn one on the bench.
The 5R110W pump is driven directly by the torque converter hub, so it turns any time the engine runs. Everything hydraulic in the transmission starts here: line pressure for the clutch packs, the fluid that feeds the converter and its clutch, and the lube and cooler flow that keeps the geartrain alive under heavy towing. On this unit the pump assembly also carries valves that control those circuits. Sonnax lists a pressure regulator valve, a converter pressure limit valve and a TCC control plunger valve in the 5R110W pump, which is why a worn pump on a TorqShift can look like a solenoid or converter clutch problem rather than a simple pressure loss.
Start with fluid level and condition, then put a gauge on the line pressure tap and compare readings in Park, Drive and Reverse at idle and stall against the service spec. Low pressure in every range points at the pump or the pressure regulator circuit; low pressure in one range points at a leak in that clutch circuit instead. Pull codes and watch commanded versus actual behavior so you do not replace a pump to fix a solenoid body fault. Our 5R110 TorqShift rebuild guide walks through the known wear points, and the 5R110 solenoid symptoms guide covers the electrical faults that are most often confused with a pressure problem.
This pump is listed for the 2003 5R110W, the first year the TorqShift went into the Super Duty and Excursion. 2003 trucks use Ford's external bypass cooler-line filter, the canister system that sends most cooler oil around a fine filter and pushes a small amount through it. Transmission Digest reports that Ford later released two service pumps: one for bypass-filter models that retrofits back to 2003, and one for later trucks without the external bypass, which switched to a redesigned sump filter beginning in 2008. The bodies are shared; the difference is a notch machined into one worm track of the pump cover on the non-bypass version, and Ford's guidance is not to use that later pump on bypass-filter trucks. That is why we sell year-specific pumps rather than one universal part.
Before you order, compare the pump cover and the part number etched on the front face of your old pump, confirm your truck still has the factory bypass filter, or send us your year and VIN and we will check it. If your truck is a 2005 or later, look at the 5R110W pump for 2005-2010, and for an early unit also see the 2003-2004 pump. Every TorqShift part we carry is on the 5R110W parts page.
After installation, clear codes and let the PCM relearn shift and converter clutch apply over several drive cycles before judging shift feel.
| Fits | 5R110W 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.
It is listed for the 2003 transmission. The 5R110W pump went through three generations, and Ford also split service pumps between trucks with the external bypass cooler filter and later trucks without it, so a 2006 should be matched to our 2005-2010 pump after comparing the part number etched on your old pump. Send us your year and VIN if you are not sure which you have.
Check line pressure with a gauge. Low pressure in every range points at the pump or pressure regulator circuit. Solenoid body faults usually set specific codes and affect particular shifts or clutches rather than every gear at once.
Use Mercon SP, the fluid Ford specifies for the 5R110W in these years. Prime the pump and check the level hot with the engine running.
Replace the front seal, pump gasket and O-ring, flush the cooler lines, and change the bypass cooler-line filter and sump filter. Inspect the converter hub for wear before installing.
Yes. The 5R110W pump houses valves that control converter and converter clutch pressure, so worn pump bores can cause TCC slip, cycling and codes such as P0741.
