AODE Governor Pressure Solenoid 1998-2004, new and ready to install. Fits the AODE. Ships fast from the USA.
Parts books still call Ford's rear-drive electronic four-speed the AODE long after the 4R70W name took over, and a lot of people searching for an AODE governor pressure solenoid are really chasing a line pressure problem. There is no governor in this transmission. This listing is the electronic pressure control (EPC) solenoid for 1998-2004 units, the years built with Ford's molded hard wire frame. Typical buyers own a 1998-2004 Crown Victoria, Grand Marquis or Town Car, an F-150, Expedition or Navigator, or an automatic Mustang, and are dealing with slipping, flaring or suddenly harsh shifts.
The computer reads throttle angle, load, vehicle speed and fluid temperature and feeds the EPC solenoid a varying current. The solenoid answers with a signal pressure, EPC oil, that works against the pressure regulator valve. More EPC oil means more line pressure, which means firmer clutch and band apply. Because the system is built to fail toward high pressure, a solenoid that loses its coil leaves the vehicle drivable but shifting hard.
What makes 1998-2004 different is how the solenoid gets power. ATSG's Wayne Colonna explains that for 1998 Ford replaced the internal wiring harness on all AODE/4R70W transmissions with a molded circuit board, the hard wire frame, which changed the case pass-through connector and every internal solenoid. The EPC solenoid in this listing is the style that clips into that frame.
Start with codes and the electrical side. On these years a cracked hard wire frame or a loose case connector can set the same codes as a failed solenoid, and Colonna notes the hard wire frame layout developed a record of electrical concerns, which is why Ford dropped it in 2009. Test the circuit at the case connector, then put a gauge on the line pressure port. Low pressure with a healthy circuit is often mechanical: Sonnax reports that the pressure regulator valve in AODE and 4R70W units commonly scores on its EPC end, giving reduced line pressure and low line rise, and the casting bore can wear with it. Our 4R70W F-150 shift problems guide and the Crown Victoria common problems guide cover the road test and gauge readings step by step.
Listed for 1998-2004 AODE and 4R70W transmissions with the black case connector and hard wire frame. It will not fit the 1993-1997 soft-harness units; ATRA's interchange notes say the early white-connector solenoids and the 1998-on black-connector solenoids do not interchange. Owners of an earlier car need the 1992-1997 EPC solenoid. It also is not for 2009-on 4R75E units, which went back to a soft harness with new design solenoids that do not retrofit. Compare your old solenoid's connector to the photo and send us your year and VIN if you are unsure. See every part for this family on the 4R70W and AODE parts page.
The EPC solenoid sits on the valve body under the pan, so drain the fluid, drop the pan and filter, and work the solenoid out of its retainer without bending the hard wire frame tabs. Inspect every terminal on the frame for cracks and burn marks while it is exposed. Lubricate the new solenoid's O-rings with clean fluid before seating it so they do not roll, and make sure the frame clips fully onto each solenoid. Fit a new filter, refill with MERCON V and set the level hot.
If the frame or the shift solenoids are also suspect, the 1998-2004 shift solenoid and filter kit covers the rest of the electrical side in one job. If the gauge showed low line rise with a good solenoid, an AODE shift kit with a new pressure regulator valve addresses the wear Sonnax describes.
| Fits | AODE 1998-2004 |
| Part type | Governor Pressure Solenoid |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
There isn't one. The AODE and 4R70W are computer controlled with no governor. Line pressure comes from the EPC solenoid, the part in this listing.
No. 1993-1997 units use a white connector with a soft internal harness, and their solenoids do not interchange with the 1998-on hard wire frame style. Order the 1992-1997 version.
Replace it if any terminal is cracked, loose or discolored, or if the codes come and go when the connector is moved. A new solenoid will not fix a broken frame.
Put a gauge on line pressure. Low line rise with a good solenoid points to pressure regulator valve and bore wear in the valve body.
MERCON V for 1998-2004 AODE and 4R70W units. Do not substitute MERCON LV.
