4R44E Solenoid Kit 1997-2011, new and ready to install. Fits the 4R44E. Ships fast from the USA.
A Ford Ranger or Mazda B-Series with the four-speed 4R44E that suddenly starts out in second, refuses fourth, or drops into a single gear with the check engine light on is telling you the computer has lost control of the hydraulics. Very often the reason is a tired solenoid. This is a new kit, not a rebuilt one, and the photo shows six pieces: four on/off shift solenoids plus the two larger pressure and lockup solenoids. It carries reference A56420K and is listed for 1997 through 2011, so one order replaces every coil on the valve body instead of one at a time.
The 4R44E is Ford's light-duty rear-drive four-speed, and it shares one valve body design with the 4R55E, 5R44E and 5R55E. Nothing on it shifts by itself. The PCM reads throttle and road speed, then switches the on/off solenoids to stroke the shift valves into each gear. The pressure solenoid sets a signal that the boost valve and main regulator use to decide line pressure, which is what makes engagements firm and keeps the bands and clutches from slipping. The lockup solenoid applies the converter clutch at cruise. A shift solenoid that sticks costs you a gear. A weak pressure solenoid shows up in every shift. A lazy lockup solenoid shows up on the highway.
Sonnax lists most of these same complaints against worn valve body bores in this family, so a new kit fixes them only when the solenoids are really the cause.
Read the codes and note whether they set cold or hot. Unplug the case connector and look for fluid or green corrosion on the pins, because a wet connector can throw solenoid codes on perfectly good parts. Then check each solenoid's resistance at the connector against the factory spec; our solenoid multimeter test guide shows how. A reading that is open, shorted or drifts when warm condemns the set. If the coils test good but the codes keep coming back, the valve body is the likely problem, and a gauge on the line tap will tell you more.
The listing covers the 4R44E from 1997 to 2011. In practice that range follows the shared solenoid design used across the 4R44E, 4R55E, 5R44E and 5R55E in Ford Rangers, Explorers and Mazda B2300, B2500 and B4000 trucks, not a promise that every truck in that window has a 4R44E. Read the tag on the transmission case first. Then set each old solenoid beside its new one and match the body shape, O-ring positions and connector before you install. If your truck is a 1995 or 1996, compare it with our 1995 4R44E solenoid kit as well. Not sure? Send us the year and VIN and we will check it. The rest of this family's parts are on the 5R55 and 4R44E parts page.
| Fits | 4R44E 1997-2011 |
| Part type | Solenoid Kit |
| Condition | New |
| Brand | OEM |
| Reference | A56420K |
| Ships | From the USA |
| Warranty | 1-year |
New. We also list a remanufactured 4R44E solenoid kit for buyers who want to spend a little less, and a separate kit for 1995 trucks.
Six, as pictured: four on/off shift solenoids plus the two larger solenoids for line pressure and converter lockup.
It is listed for 1997-2011 4R44E applications. Check the tag on the case to confirm which transmission you have, compare the old solenoids with the new ones, or send us your VIN and we will confirm it.
It can be a stuck shift solenoid, but Sonnax also links second-gear starts to a worn EPC and engagement control area and a worn solenoid regulator valve in the valve body. Test the solenoids first so you replace the right part.
Refill with Mercon V and check the level hot. Clear the codes, reset adaptive learning and drive through every gear so the PCM relearns its shift pressure.
