4R70W Pump 1995, remanufactured and ready to install. Fits the 4R70W. Ships fast from the USA.
A 1995 4R70W is an early, first-design unit, and after this many years the front pump is a common wear point. Typical complaints: the truck or car sits in gear for a moment before it moves, Reverse takes even longer, and everything gets worse once the fluid is hot. You may also hear a steady whine that climbs with the tachometer. This remanufactured pump is listed for the 1995 4R70W and ships ready to install.
The 4R70W arrived around 1993 as a wide-ratio development of the AODE, built around a 2.84:1 first gear for Ford's modular V8s. The front pump is a gear pump turned by the converter hub. It pulls fluid through the filter and sends it to the main regulator in the valve body, which sets line pressure, while the EPC solenoid raises pressure with load. The forward clutch is fed from the front of the transmission, so pump volume and the sealing rings on the stator support directly decide how quickly Drive engages.
The pump also feeds converter charge and the cooler. Sonnax warns in its rebuild instructions that excessive lobe-to-lobe clearance in the pump gears means low pump volume and low cooler flow, which kills the converter and the gear train. On a 1995 unit that has never had the pump apart, that clearance is often well past the limit.
Check fluid level and condition first, then put a pressure gauge on the line tap. Low pressure at idle in every range with noise points at the pump. Pressure that is fine at idle but will not rise with throttle points at the regulator circuit or EPC instead; Sonnax documents pressure regulator valve wear across this family. On a 1995, also check wiring before condemning hard parts: ATRA notes that 1993-1997 units use a white case connector with wiring built into it, and a bad connector can cause erratic pressure and multiple codes. Our 4R70W F-150 common problems guide and the 4R70W and 4R75W diagnosis guide cover the pressure test step by step.
This pump is listed for 1995 4R70W transmissions. Several parts in this family changed between 1995 and 1996; Sonnax, for instance, sells regulator valve kits for 1995-and-earlier units separately from 1996-and-later units. Pumps and stator supports can differ by build date as well, so compare your old pump body, stator support and sealing rings with the replacement, read the ID tag on the case, or send us the year and VIN before installing. For a wider year range, see the 4R70W pump for 1995-2003, and find everything else for this unit on the 4R70W parts page.
| Fits | 4R70W 1995 |
| 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.
Often the pump bolts in, but revisions happened in this period. Compare the pump body, stator support and sealing rings with your old one, or send us the year and VIN and we will confirm the match.
Use a pressure gauge. Low pressure at idle with pump whine points to the pump. Normal idle pressure that does not rise with throttle points to EPC, the regulator valve or the 1993-1997 white connector and its wiring.
A front seal, pump gasket and O-ring at minimum, plus a converter hub inspection. If the fluid is burnt, rebuild the unit rather than replacing only the pump.
MERCON V. Prime the new pump with it before the first start and set the level hot on the dipstick.
Usually it is a misaligned pump, a worn converter hub or a restricted filter. Check alignment and the hub before blaming the new pump.
