4R70W Pump, remanufactured and ready to install. Fits the 4R70W. Ships fast from the USA.
A Ford F-150, Expedition, Crown Victoria, Grand Marquis, Town Car, Navigator or Mustang with the 4R70W that is slow to pick up Drive and Reverse, slips in every gear instead of just one, or whines in step with engine speed is often telling you the front pump can no longer keep up. This is a remanufactured 4R70W pump assembly, ready to bolt in, so you are not hand-fitting a worn housing and gear set at the bench. It carries a 1-year warranty and ships from the USA.
The 4R70W pump sits at the front of the case, right behind the torque converter. Its inner and outer gears ride in a pocket in the pump body and are turned by the converter hub, so the pump spins whenever the engine runs. Everything hydraulic in the transmission starts there: line pressure for the clutches and bands, converter charge oil, cooler flow and lubrication. The stator support bolts to the pump body and routes oil to the forward clutch and converter, which is why the pump and stator are treated as one assembly. Sonnax's 4R70W/AODE rebuild sheet warns that excess gear clearance means low pump volume and low cooler flow, and that combination destroys converters and gear trains.
Put a gauge on the line pressure tap before you buy a pump. If pressure is low in every range, the pump is a strong suspect. If pressure is fine at idle but will not rise when you load the engine, look at the valve body first: Transmission Digest and Sonnax both document 4R70W pressure regulator bore wear that bleeds EPC boost oil to the pump inlet and kills line rise, and an EPC solenoid fault does the same thing. Scan for codes so a solenoid problem is not mistaken for pump wear. Our 4R70W and 4R75W problems guide walks through the cross-leak and regulator failures that mimic a bad pump, and the 4R70W F-150 common problems guide covers the truck-specific complaints.
This listing is for the 4R70W without a year range printed on it. The 4R70W was built from about 1993 into 2008, and Ford revised it more than once, most notably for 2004 when Transmission Digest reports a redesign that added a turbine shaft speed sensor. Pumps and stator supports from different generations are not always interchangeable, so match the old pump casting and bushing size, or send us your year and VIN and we will confirm before it ships. If you already know your range, the 1995-2003 4R70W pump and the 2004-2008 4R70W pump are listed by year. Every pump and hard part we carry is on the 4R70W collection page.
If the pump failed from debris or heat, the clutches have usually been hurt too. Pairing the pump with the 4R70W master rebuild kit and flushing the cooler lines keeps contamination from killing the new pump.
| Fits | 4R70W |
| 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.
The listing covers the 4R70W without a printed year range. Because Ford revised the unit over its 1993-2008 run, send us your year and VIN or compare your old pump casting and we will confirm fitment. Year-specific 1995-2003 and 2004-2008 versions are also listed.
Check line pressure. Low pressure in every range points to the pump. Normal idle pressure that will not rise under load more often points to pressure regulator bore wear or an EPC problem in the valve body.
A new front seal, pump gasket and O-ring at minimum. Inspect the converter hub for scoring, flush the cooler and lines, and if the pan shows clutch material, rebuild the clutch packs at the same time.
MERCON V. Ford lists about 13.9 quarts dry fill for the 4R70W in the 2003 Crown Victoria, but always set the final level on the dipstick with the engine running and the fluid hot.
Yes. Put fluid in the converter and pump before the first start so the gears and bushing are not run dry, then top off the fluid with the engine idling.
