5R55W Solenoid Kit, remanufactured and ready to install. Fits the 5R55W. Ships fast from the USA.
This is the repair most 2002-up Ford Explorer and Mercury Mountaineer owners end up needing when the five-speed starts flaring on the 2-3 shift, banging into gear, or dropping into limp mode with solenoid codes. It is a remanufactured solenoid block for the 5R55W and 5R55S, tested before it ships, and it comes with a new filter and pan gasket so the whole service gets done in one pan drop. The listing calls out the 4.0L and 4.6L Explorer from 2002 on and the 2003-2006 Lincoln LS with the 3.0L and 3.9L.
On the W and S, Ford moved every solenoid into one assembly that bolts to the valve body. Inside it are four on/off shift solenoids, a pulse width modulated converter clutch solenoid, and three variable force pressure control solenoids, PCA, PCB and PCC. PCA and PCB work in opposition to raise and lower mainline pressure from Park through manual first. PCC sets reverse engagement pressure and controls the direct clutch in fourth and fifth. PCA also feeds the modulator that applies the intermediate servo in third gear. That is why a tired block does more than set codes. Small pressure errors change shift timing and feel, and the most common complaint is a soft, flared 2-3 shift or a harsh downshift.
The same symptoms can come from hydraulic wear. Servo pin bore wear in the case is a well documented 5R55W/S failure that causes slipping and P0735, and worn pressure regulator or servo control valves cause flare shifts too.
Pull codes and live data first. Inspect the case connector and harness for fluid wicking and heat damage, and look in the pan: a block will not fix a unit that is full of friction material. If the fluid is clean and the shift complaints match the pressure control pattern above, the block is the likely cause. Our 5R55S shift solenoid symptoms guide and the servo pin bore wear guide will help you tell the two apart.
This listing names the 5R55W and 5R55S in the Explorer 4.0L and 4.6L from 2002 on and the 2003-2006 Lincoln LS, and lists 9L2Z-7G391-AA along with earlier numbers and interchange 46420B. Here is why that matters. Ford built two versions of this block. Per the ATRA technical bulletin, 2002-2003 Ford units and the 2003 Lincoln use the early pack, 1L2Z-7G391-AG, while 2004-on Ford units and the 2004-2006 Lincoln use the later design, 4L2Z-7G391-AA, updated to 9L2Z-7G391-A. Fitting the wrong one is a common reason a freshly rebuilt 5R55W/S flares on the 2-3 shift. Read the number on your old block and send it with your year and VIN, and we will confirm this unit matches before it ships. All our parts for this family are on the 5R55 parts page. If you already know you need the updated 9L2Z design, see the 9L2Z-7G391-AA solenoid block.
| Fits | 5R55W |
| 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.
A remanufactured 5R55W/5R55S solenoid block, plus a filter and pan gasket so you can do the full pan service at the same time.
2002-2003 Explorers use the early solenoid pack, 1L2Z-7G391-AG, while 2004 and newer use the later design. The listing covers 2002 and up, so send us the number on your old block with your VIN and we will confirm this unit matches before it ships.
A mismatched solenoid pack is a common cause. The early and late blocks deliver slightly different pressures, and a small difference changes mainline and shift feel. Worn pressure regulator or servo control valves can also cause it.
The block bolts to the valve body inside the transmission, and the 5R55W is used in both 2WD and 4WD Explorers. Match the part number on your old block rather than the drive type.
Yes. Clear the codes, reset adaptive learning with a scan tool if you have one, and drive through every gear with light throttle so the computer can relearn shift pressures.
