4R70W Pump 1995-03, remanufactured and ready to install. Fits the 4R70W. Ships fast from the USA.
A tired front pump is behind a lot of the 4R70W complaints that owners of 1995-2003 F-150s, Expeditions, Mustangs, Crown Victorias, Grand Marquis and Town Cars describe: a clunk-and-wait into gear after the truck has been driven hard, soft slipping shifts that get worse on a long highway pull, and a steady whine at idle. This remanufactured pump assembly covers the 1995 through 2003 model years, the long middle stretch of 4R70W production before Ford redesigned the pump for 2004.
In the 4R70W the pump is the only source of oil pressure. It bolts to the front of the case, its gears are turned by the torque converter hub, and its output feeds the main pressure regulator. From there the EPC solenoid raises and lowers line pressure based on throttle and load, and the valve body sends that oil to the forward, direct, intermediate and overdrive circuits and to the converter clutch. The pump body also holds the stator support shaft and the bushing that centers the converter hub. A 4R70W pulling a loaded F-150 or Expedition asks a lot of that pump, because heat thins the fluid and every worn clearance leaks a little more, so volume drops off right when line pressure needs to be highest.
Gauge line pressure first. Low pressure in every range that climbs with RPM points at the pump, but the 4R70W has a well-documented look-alike: a scored pressure regulator valve on the EPC end lets EPC oil bleed back to the pump inlet and kills line rise, so the valve body needs to be ruled out too. Our 4R70W and 4R75W problems guide explains that test and the forward and direct clutch cross-leaks that can mimic a weak pump. For truck owners, the F-150 problems guide and the Expedition problems guide cover the towing-related failures that usually travel with pump wear.
From 1993 through 2003 the 4R70W pump uses gears roughly 0.608 inch thick and a stator support shared with the AODE. For 2004 Ford changed the stator support, and many 2004-up pumps also carry thicker 0.656 inch gears, so this pump is not a swap for a 2004-up transmission; those owners should look at the 4R70W pump for 2004-2008. A 2003 sits right at the changeover, so pull the old pump and measure gear thickness and compare the stator splines before installing. You can also send us your year and VIN and we will check fitment. See the whole 4R70W parts collection for every pump and hard part we stock for this unit.
The pump is serviced with the transmission out of the vehicle and the converter removed. Fit a new front seal and verify the bushing-to-hub clearance; Ford's original bushing is machined in place, and thin aftermarket drop-ins can leave too much clearance. Check the converter hub for wear grooves or a damaged drive tang before it goes back in. Use a new pump gasket, outer O-ring and sealing rings if they are not supplied, center the pump with an alignment band and torque the bolts evenly. Refill with Mercon V; a dry 4R70W takes about 13.9 quarts including the converter, with the final level set hot on the dipstick. With the pan off, test the EPC solenoid on 1995-97 units, and replace the TCC solenoid if converter lockup was also acting up. Clear adaptive memory when the job is done.
| Fits | 4R70W 1995-03 |
| 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.
Usually, but 2003 is the changeover year. Measure the old pump's gear thickness (about 0.608 inch on this design) and compare the stator support splines against the new pump, or send us your VIN and we will confirm.
The pump body, gear thickness and stator support are shared across the 1993-2003 AODE and 4R70W family, which is why both names appear on pumps in this range. Matching your old pump's stator, gears and bolt pattern is the reliable check.
A front seal, pump gasket, outer O-ring and stator support sealing rings, plus a filter. Inspect the converter hub, and if the old pump shed debris, flush or replace the cooler and inspect the valve body.
Ford lists Mercon V and about 13.9 quarts dry with the converter. A pan drop takes far less, so always set the final level on the dipstick at operating temperature.
Clear the adaptive memory with a scan tool or a battery disconnect, then drive through all gears at light and moderate throttle so the computer relearns shift timing on the new pressure.
