5R55W Valve Body 2001-2008, new other (see details) and ready to install. Fits the 5R55W. Ships fast from the USA.
A 2001-2008 Explorer, Mountaineer, Lincoln LS or Thunderbird that shifts harshly, flares between gears, or sets a solenoid or pressure code is a common complaint on the 5R55W, and nearly all of the shift control in this unit runs through the valve body. This valve body covers the 2001-2008 production run and is new other (see details) rather than a pulled, used unit.
The 5R55W belongs to the later 5R55N/S/W family Ford introduced for the redesigned Explorer and Mountaineer and for the Lincoln LS and Thunderbird, distinct from the earlier 5R55E. Per Sonnax, these units carry a more complex solenoid pack than the earlier 5R55E - four on/off shift solenoids, one PWM TCC solenoid and three variable force solenoids - all commanded through the valve body, so shift quality, converter lockup and pressure control all route through the same hydraulic bores this part houses. The W and S variants share the same case but run different internal calibrations; Sonnax identifies them externally by the casting bosses behind the intermediate servo cover, so confirming which one your vehicle actually has before ordering matters more here than on most transmissions.
Because the 5R55W and 5R55S share a case but run different calibrations, a valve body swap between the two will not restore correct shift behavior even though it may bolt in. Confirm you have a W-code unit by checking the casting bosses behind the intermediate servo cover before ordering, and work through the full symptom-to-cause pattern in our 5R55 harsh or delayed shifts guide, since servo bore wear and separator plate wear can produce the same complaints without the valve body itself being bad.
This valve body covers 2001-2008 production of the 5R55W, used in the Ford Explorer and Mercury Mountaineer and in the Lincoln LS and Ford Thunderbird within that window. Ford revised the valve body more than once across this run, so match the casting and connector count on your original unit against the listing photos, or send your exact year and VIN before ordering. See our 5R55 parts hub for the narrower year-range listings and for the 5R55S if your vehicle turns out to run the sport-calibration variant instead.
Drop the pan and change the filter and fluid at the same time as the valve body so debris from the old unit does not circulate into the new one - the 5R55W runs on Mercon V ATF. Torque the solenoid body bolts in sequence and to spec rather than corner to corner; overtorquing this casting is a documented cause of comebacks. Clear codes and run the adaptive relearn drive cycle after installation instead of driving normally, since the computer needs to recalibrate shift feel to the new valve body. If the complaint included converter shudder, check the 5R55W solenoid kit alongside this valve body, and if you are already into the pan for a full repair, the 5R55W master rebuild kit covers the frictions, steels and seals for a complete rebuild.
| Fits | 5R55W 2001-2008 |
| Part type | Valve Body |
| Condition | New Other (See Details) |
| Brand | Sonnax |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
They share the same case but run different internal calibrations, so swapping between them will not restore correct shift behavior even though it may physically bolt in. Confirm which variant you have by the casting bosses behind the intermediate servo cover before ordering.
The 5R55W belongs to the later 5R55N/S/W family and carries a more complex solenoid pack - four on/off shift solenoids, one PWM TCC solenoid and three variable force solenoids - compared with the simpler 5R55E layout.
Mercon V ATF. Change the fluid and filter at the same time you install this valve body.
Yes. Clear codes and run the adaptive relearn drive cycle so the computer recalibrates shift feel to the new valve body, rather than driving it normally right away.
The Ford Explorer and Mercury Mountaineer, plus the Lincoln LS and Ford Thunderbird, within that production window.
Check the solenoid kit alongside the valve body, since a worn PWM TCC solenoid produces shudder symptoms that look like a valve body fault.
