4R44E Pressure Control Solenoid 1995-2012, new and ready to install. Fits the 4R44E. Ships fast from the USA.
If you own a 2.3L or 3.0L Ford Ranger, a mid-1990s Aerostar or Explorer, or a Mazda B2300 or B3000 with the four-speed 4R44E, and the truck has started banging into gear, slurring the 1-2 shift or throwing a pressure control fault, this is the part most shops test first. It is a new electronic pressure control (EPC) solenoid in the original equipment layout: a steel body with a flat mounting tab, a two-blade electrical connector and twin red filter screens on the nose. That red-screen, bracket-mounted design is the one Ford installed at the factory, and the same solenoid carried on into the five-speed 5R44E and 5R55E, which is why this listing spans 1995 through 2012.
The 4R44E was released for 1995 behind the smaller Ford and Mazda engines, and it was one of the first rear-drive Ford automatics with no throttle cable and no vacuum modulator. Line pressure is decided entirely by the powertrain computer. It reads throttle angle, load and road speed, then sends a varying current to this solenoid. The solenoid bleeds a signal pressure to the boost valve, and the boost valve sets mainline at the pressure regulator. That mainline is what squeezes the clutch packs and applies the bands. Sonnax also points out that the converter clutch regulator in this valve body is fed by line pressure, so poor line rise from a dirty EPC solenoid can show up as converter slip, not just soft shifts.
Start with the cheap checks: fluid level, fluid condition, and the stored codes. Unplug the transmission case connector and look for ATF wicking up the harness, which can corrupt the EPC signal on its own. Measure the EPC circuit through the connector using the method in our multimeter solenoid test guide; an open coil or a short to ground settles it. If the electrical readings are normal, put a gauge on the line pressure tap and command EPC with a scan tool. Pressure that rises and falls with the command means the solenoid is working and the problem is elsewhere, usually worn boost valve or regulator bores. The gauge procedure is in our line pressure checking guide, and the harsh or delayed shift walkthrough covers the same valve body.
Per the Rostra and Transtar interchange for this solenoid family, the 4R44E used it from 1995 through 2001, after which Ford's small rear-drive trucks moved to the five-speed 5R44E and 5R55E with the same EPC design through 2011. Vehicles on that interchange include the 1995-2011 Ranger, 1995-1997 Aerostar, Explorer, Mercury Mountaineer and Mazda B2300, B2500, B3000 and B4000 trucks. Because the title runs to 2012, treat later model years as a match-it-first case: compare the mounting tab, the two-blade connector and the twin-screen nose against your old solenoid, or send us your year and VIN and we will confirm it. This solenoid does not fit the 5R55W or 5R55S used in 2002-up Explorers and Mustangs. The rest of this family is on our 5R55 and 4R44E parts page.
If the pan is already down and the truck has high miles, replacing the other solenoids at the same time with the 4R44E solenoid kit is cheap insurance, and a valve body with repeat pressure codes is a candidate for the Sonnax 4R44E/5R55E Zip Kit.
| Fits | 4R44E 1995-2012 |
| Part type | Pressure Control Solenoid |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Yes, the 4R44E used this red-screen EPC design for its whole run, 1995 through 2001, in Ranger, Aerostar, Explorer and Mazda B-Series trucks. Match the mounting tab and two-blade connector to your old part, or send us your year and VIN if you want a second check.
The same EPC solenoid continued in the five-speed 5R44E and 5R55E that replaced the 4R44E, which ran in Rangers and Mazda trucks into the 2011 model year. The listing range reflects that whole family, not the 4R44E alone.
Either. An open coil or broken wire usually sends the transmission to maximum pressure, so every shift is hard. A solenoid that is sticking or has clogged screens tends to hold pressure low, causing flare and slipping on the 1-2 and 2-3 shifts.
No. The solenoid mounts on the valve body with one bracket bolt. Drain the fluid, drop the pan and filter, and it comes out through the pan opening.
At minimum a new filter and pan gasket. On a high-mileage truck many owners also replace the shift and converter clutch solenoids, since they are the same age and the labor is already done.
Ford specified MERCON for the early units and MERCON V superseded it. Use MERCON V or the exact fluid printed on your dipstick or in the owner's manual.
