4R70W Pump 2003-2008, used and ready to install. Fits the 4R70W. Ships fast from the USA.
This is a used OEM front pump for the Ford 4R70W covering 2003 through 2008, a budget way to replace a worn or damaged pump in an F-150, Expedition, Crown Victoria, Grand Marquis or Town Car without paying for a remanufactured unit. Buyers usually land here after a transmission started taking a second or two to engage Reverse, began slipping when hot, or picked up a whine in Park that rises with the throttle. It carries a 1-year warranty and ships from the USA.
Every drop of pressure in a 4R70W starts at the front pump. The converter hub drives a pair of gears inside the pump body, and that flow becomes line pressure, converter charge, cooler flow and lube. The same casting carries the intermediate clutch piston that applies second gear, and the stator support bolted to it routes oil to the forward clutch through sealing rings. Sonnax points out that damage at the inner ring area of the stator support can drop forward clutch pressure and burn the overdrive band, so a pump problem can look like a band problem.
This listing crosses the biggest change the 4R70W ever had. Transmission Digest reports that Ford released the updated 4R70E and 4R75E at the start of 2004 production, and ATRA's interchange notes show the 2004-up pump body uses a larger bonded rubber intermediate piston instead of the earlier aluminum piston, with a different return spring. A 2003 transmission and a 2006 transmission therefore do not take the same pump interchangeably. ATRA also notes the W and E stator supports use different forward sealing rings, cast iron on the W and a thinner plastic ring on the E, so the rings must match the support.
Gauge line pressure at idle and stall. If it is low everywhere, the pump is the prime suspect. If it is good at idle but will not rise, look at the pressure regulator bore and the EPC circuit first. On 2001 and later valve bodies there is also a known forward and direct clutch cross-leak after Ford deleted the stiffener plate, which our 4R70W and 4R75W problems guide explains along with the retainer plate fix. SUV owners can work through the Expedition common problems guide for the truck-specific failures.
Before you order, pull your old pump or check your build date and tell us which side of the 2004 change your transmission is on. Match the intermediate piston style, the stator support sealing rings and the casting to the pump you remove, or send us your year and VIN and we will confirm the correct one. If you would rather have a remanufactured late unit, see the 2004-2008 4R70W pump; earlier transmissions use the 1995-2003 pump. Everything else for the transmission is on the 4R70W collection page.
For a 2001-up valve body, the Sonnax 76507F-01K retainer plate kit addresses the cross-leak while you are in there, and the 4R70W master rebuild kit covers frictions and seals if the old fluid was burnt.
| Fits | 4R70W 2003-2008 |
| Part type | Pump |
| Condition | Used |
| 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.
No. The 2004-up pump body uses a larger bonded rubber intermediate piston and a different return spring than 2003 and earlier. Tell us which transmission you have, or send the year and VIN, so we ship the pump that matches.
Cost. A good used OEM pump with sound gears and pocket is a solid repair for a high-mileage vehicle. Inspect the bushing and gear faces when it arrives, and if you want a rebuilt unit, the remanufactured 2004-2008 pump is also listed.
Indirectly, yes. Sonnax notes that damage at the inner ring area of the stator support, which bolts to the pump, can cause low forward clutch pressure and a burned overdrive band. Inspect that area on the old pump.
The front seal, pump gasket, outer O-ring, filter and fluid at minimum. On 2001-up valve bodies consider the Sonnax retainer plate kit for the forward and direct cross-leak, and flush the cooler before the first start.
MERCON V. Ford lists about 13.9 quarts as the approximate dry fill for the 4R70W in its 2003 Crown Victoria owner guide, but a pump swap only loses part of that, so set the final level on the dipstick hot.
