5R55E Pump 1997, remanufactured and ready to install. Fits the 5R55E. Ships fast from the USA.
Ranger, Explorer and Mountaineer owners with the 5R55E five-speed usually start looking for pump parts after a teardown turns up scored gears, or after a slow, soft engagement and a whine that tracks engine speed. This part is a remanufactured 5R55E pump stator assembly supplied with its gear set, for 1997-and-later units that use the 24-tooth inner pump gear. It carries the Ford reference number F77Z-7A103-CA. It is the stator half of the pump with the gears, not the bell housing, so it suits a rebuild where your housing and bushing are still in good shape.
The 5R55E is not a cousin of the 5R55W and 5R55S that came later. Sonnax traces it from the 4R44E of 1995, which became the 4R55E with stronger parts for the 4.0L in 1996 and then a five-speed for 1997, when Ford began applying the front servo for an overdriven first and fifth. It belongs to the A4LD family. In this design the converter hub drives the inner gear, the gears turn inside the pocket, and the oil they move feeds the pressure regulator. The regulator, steered by the EPC solenoid, sets line pressure for the clutches, bands, servos and converter. Sonnax describes the bushing that supports the converter hub on the A4LD, 4R44E/55E and 5R44E/55E as a bell housing bushing that has to be finished in place, which is why the stator and gears are serviced on their own.
Many 5R55E pressure complaints come from the valve body rather than the pump. Sonnax points out that the EPC circuit wears and leaks in several places and has an engagement control valve that sticks, which causes delayed reverse, flares and harsh shifts. If the engine stalls when you shift into Drive or Reverse, Sonnax suggests checking for blown gaskets and a worn pressure regulator bore before blaming the pump or converter. A pressure gauge and a cooler flow check tell you which one you are dealing with: low pressure in every range with good EPC readings points to the pump. Our 5R55 harsh or delayed shift walkthrough covers the test order, and the 5R55 identification guide shows how to confirm you have an E and not a W or S before buying anything.
This stator assembly is listed for 1997-and-later 5R55E transmissions with the 24-tooth inner gear, as used in the Ranger, Explorer and Mountaineer. Count the teeth on your old inner gear and compare the stator casting and bolt pattern with the photo. If anything looks different, send us your year, engine and VIN before ordering. It will not fit a 5R55W, 5R55S or 5R55N. Other parts for this family are on our 5R55 transmission page.
| Fits | 5R55E 1997 |
| 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 the pump stator assembly with the gear set. It does not include the bell housing, which holds the converter hub bushing on this transmission family.
No. The 5R55E is an A4LD-family transmission, and the 5R55W and 5R55S are a different design with different pump hardware. Check your transmission code before ordering.
Count the teeth on your old inner pump gear. This assembly is listed for 1997-and-later units with the 24-tooth inner gear.
Mercon V. Lube the gears with it when you assemble the pump, and set the final level with the transmission at operating temperature.
The front seal, stator support seal rings, pump gaskets and filter. Inspect the bell housing bushing and converter hub, and check the valve body if the old pump left metal in the pan.
