5R55S Solenoid Kit 2002-2010, new and ready to install. Fits the 5R55S. Ships fast from the USA.
A Mustang V6 that bangs into third, a late Explorer that flares on the 2-3 shift, or a Lincoln LS that falls into limp mode with a pressure control code all lead to the same part on the 5R55S: the solenoid pack. This is a new pack, not a rebuilt core, listed for the 2002-2010 5R55S and W family. Buying new matters on this unit because the pack's variable force solenoids wear internally, and a new assembly starts with full adaptive range for the PCM to work with.
The 5R55S is fully electronic. The pack bolts to the valve body and holds eight solenoids: four on/off shift solenoids, one PWM converter clutch solenoid and three variable force solenoids, according to Transmission Digest. ATRA's seminar material breaks down the variable force trio. PCA and PCB are commanded in opposite directions to move the boost valves and set mainline pressure, and they feed the modulators that apply the intermediate and overdrive servos. PCC applies the direct clutch for fourth and fifth and also controls reverse engagement. That is why one tired solenoid on this pack can upset forward shifts and reverse at the same time.
Start with the basics: correct Mercon V level checked hot, no burnt smell, and no friction material piled in the pan. Then pull codes and look at commanded versus actual gear on a scan tool. A slip in fifth with a ratio code is usually the servo pin bore wear common to this case, and a new pack will not cure it. A Mustang owner can work through our 5R55S Mustang shift problems guide, and the 5R55 harsh and delayed shift walkthrough covers the engagement tests.
The listing names the 5R55S for 2002-2010. In practice the S and W share this pack layout. Sonnax places the S in the Lincoln LS and Thunderbird from 2003 and in the Explorer and Mountaineer from the 2004 model year, after the W in 2002-2003, and the S stayed in the Mustang V6 and GT through 2010. ATRA's notes add a catch: Ford built 2002-2003 units and the 2003 LS with the early 1L2Z-7G391-AG pack and switched to the late pack for 2004 on, and the two deliver slightly different pressures. For a 2002-2003 vehicle, check the number on your old pack or send us the year and VIN. If you are not sure whether you have an S, W or N, our 5R55S vs 5R55W comparison shows how to tell. More parts for the family are on the 5R55 collection page.
| Fits | 5R55S 2002-2010 |
| Part type | Solenoid Kit |
| 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.
Yes. The Mustang V6 and GT in those years use the 5R55S, which this pack is listed for. Confirm the transmission tag if the car has been swapped.
Yes. The 5R55S and 5R55W share this pack layout. Only 2002-2003 vehicles need extra care because Ford used an earlier pack number in those years.
The listing states it is new, with a 1-year warranty.
No. Sonnax notes the 5R55N uses a different solenoid with reverse pressure switch terminals and different circuits. It does not interchange with the S or W pack.
A filter and pan gasket at minimum. If the internal harness or case connector leaks, replace those too, and relearn the adaptives after install.
