5R55W Solenoid Kit 2002, remanufactured and ready to install. Fits the 5R55W. Ships fast from the USA.
A 2002 Ford Explorer or Mercury Mountaineer that holds third gear, shifts hard from second, or throws shift solenoid codes after a cold start is usually telling you the solenoid block has had enough. This listing is a 5R55W/5R55S solenoid block that has been bench tested, so it arrives with test oil on it, and it comes with a new filter and gasket. It is listed for 2002-up Explorer with the 4.0L or 4.6L and for the 2003-2006 Lincoln LS with the 3.0L or 3.9L, and the part numbers on the listing are 9L2Z-7G391-AA, 4L2P-7G391-AA and 1L2P-7G391-AA, with aftermarket interchange 46420B.
2002 was the first model year for the five-speed W behind the Explorer V6 and V8. Transmission Digest counts eight solenoids in the block: four on/off shift solenoids, one PWM converter clutch solenoid and three variable force solenoids. The on/off solenoids select the gear. The three pressure solenoids shape the shift. Of those, PCA and PCB set mainline and also run the modulators that apply the intermediate servo, the overdrive servo and the coast clutch, and PCC applies the direct clutch for fourth and fifth and controls reverse engagement. Because every apply in this transmission is pressure-shaped by those three, a block that is out of range changes shift feel long before it sets a hard fault.
On a truck this age, wiring causes as many solenoid codes as the solenoids do. Unplug the case connector and look for fluid that has wicked up into the external harness, and check the pins for green corrosion. With the pan off, look at the internal harness for hardened, cracked insulation. Then look at the debris in the pan. Fine gray paste is normal, but black friction material or brass chunks mean internal damage. If the problem only shows up as a 2-3 flare, ATRA's notes also point at worn pressure regulator and servo control valves. Our 5R55W Explorer common problems guide lists the usual failures for this generation, and the 5R55 harsh and delayed shift walkthrough explains the engagement checks.
The listing is broad, covering 2002-up Explorer and the 2003-2006 Lincoln LS, but ATRA's application chart is stricter. It puts 2002-2003 Ford units and the 2003 Lincoln on the early pack, 1L2Z-7G391-AG, and 2004-on Ford units and the 2004-2006 Lincoln on the later pack, with the updated 9L2Z design preferred. Fitting the wrong pack can leave a perfectly good transmission with a 2-3 flare. So for a 2002 or 2003 vehicle, pull the pan, read the number on your old block, and send it to us with your year and VIN before ordering. Owners of 2004 and newer trucks will find the 5R55W solenoid kit for 2002-2010 lists the late design with a filter, screen and gasket. All parts for this family are on the 5R55 collection page.
| Fits | 5R55W 2002 |
| Part type | Solenoid Kit |
| Condition | Remanufactured |
| 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.
The block has been bench tested, which is why it arrives with oil on it. The filter and gasket in the kit are new.
The listing covers 2002-up Explorer with the 4.0L and 4.6L. ATRA lists 2002-2003 trucks on the early pack, 1L2Z-7G391-AG, so send us the number on your old block with your VIN and we will confirm before it ships.
The listing names the 2003-2006 Lincoln LS with the 3.0L and 3.9L. The 2003 LS used the early pack and 2004-2006 used the late one, so match your old part number.
The filter and gasket come with this block. On an older truck the internal wiring harness is worth replacing too, since heat-cracked insulation causes solenoid codes.
It helps. Clear the codes and reset the adaptive values, then drive through all five gears so the PCM relearns shift pressure.
