5R55E Pressure Control Solenoid 1997-2011, new and ready to install. Fits the 5R55E. Ships fast from the USA.
If your Ford Ranger, 1997-2001 Explorer or Mercury Mountaineer with the 5R55E five-speed has started banging into gear, flaring between upshifts, or setting an EPC (electronic pressure control) code, this is the part most shops test first. It is a new, bracket-mounted EPC solenoid for the 1997-2011 5R55E, cross-referenced to Ford service numbers XL2Z-7G383-AA and 9L2P-7G383-AA. It plugs into the valve body under the pan, so on most trucks the repair is a pan-drop job rather than a transmission removal.
The 5R55E does not use a vacuum modulator or throttle cable to set line pressure. The PCM does it through this one solenoid. The EPC solenoid sends a regulated signal oil to the boost valve in the valve body, and the boost valve pushes on the main pressure regulator to raise or lower line pressure. Because the 5R55E applies its intermediate and overdrive bands with servos, line pressure decides how firmly those bands grab during the 2-3 and 3-4 shifts. Ford designs this solenoid to fail toward high pressure: with no current flowing through it, the signal goes to maximum and line pressure climbs. That is why a solenoid with an open circuit usually causes harsh, slamming shifts, while one that is worn or sticking can cause soft shifts and slipping.
Scan for codes first and note whether they are electrical (open or short) or performance related. Unplug the case connector and look for fluid that has wicked into the terminals, since that alone can set intermittent codes. Measure the EPC solenoid resistance at the connector and compare it to your service manual. The best test is a line pressure gauge on the case tap: if pressure does not change when the scan tool commands EPC up and down, the solenoid or its signal circuit is at fault. If pressure follows the command but is still low, look at the boost valve and sleeve, which Sonnax lists as a common wear point in this valve body family. Our 5R55 harsh or delayed shift walkthrough covers the order to run these tests.
This solenoid is listed for the 5R55E from 1997 through 2011, and Ford used the same EPC solenoid across the 4R44E, 5R44E and 5R55E family. The application list supplied with it covers the 1997-2011 Ford Ranger with the 2.3L, 3.0L or 4.0L, the 1997-2001 Explorer and Mountaineer with the 4.0L V6, and Mazda B2300, B3000 and B4000 trucks through 2010. It is not the part for the later 5R55W or 5R55S used in 2002-up Explorers, Mustangs and Lincoln LS models, which carry their pressure control solenoids inside a solenoid body. Match the bracket shape, the two-blade connector and the screened tip to your old part, or send us your year and VIN and we will confirm it. You can browse everything else we stock for this family on our 5R55 transmission parts page.
If a pressure test shows worn valves rather than a bad solenoid, a complete 5R55E valve body is the cleaner fix. If the bands are already slipping, an overhaul kit for the 1997-2011 5R55E covers the seals and friction work the solenoid alone cannot repair.
| Fits | 5R55E 1997-2011 |
| Part type | Pressure Control Solenoid |
| Condition | New |
| 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.
If it has the 4.0L V6 and the 5R55E five-speed automatic, yes. The 1997-2001 Explorer and Mountaineer 4.0L trucks used this bracket-mounted EPC solenoid. If you are not sure which transmission is in the truck, send us the VIN and we will check it.
No. From 2002 the Explorer moved to the 5R55W and later 5R55S, which put pressure control inside a solenoid body. This part is for the 5R55E used in Rangers through 2011 and earlier Explorers.
Ford's EPC solenoid is built to default to maximum line pressure when it loses its electrical signal. That protects the clutches and bands from slipping but makes every shift firm. Fix the wiring or replace the solenoid and shift feel should return to normal.
Yes. On the 5R55E it sits on the valve body under the pan and is held by one bracket bolt. Plan on a pan drop, a new filter and a full refill of Mercon V.
Only if testing points to them. If the shift solenoids and TCC solenoid test good and there are no shift or lockup codes, the EPC solenoid alone is a reasonable repair. If several solenoid codes are present, a full solenoid set saves a second pan drop.
