5R110W Shift Kit 2003-10, new and ready to install. Fits the 5R110W. Ships fast from the USA.
The 6.0L and 6.4L Power Stroke trucks are the TorqShifts that get worked hardest: heavy trailers, tuned engines and big converter loads. When a 2003-2010 F-250 through F-550 or Excursion starts slipping the converter clutch on a grade, slips in reverse, or sits in gear without moving, a TransGo shift kit installed during the rebuild deals with the pressure problems behind those failures. This listing covers the 5R110W across 2003-2010, the whole Super Duty pickup run before Ford moved those trucks to the 6R140.
Line pressure in this transmission comes from a regulator valve in the pump, steered by the PC-A solenoid. TransGo's research found two weak spots that matter most on diesel trucks. The regulator valve sticks as the pump casting distorts, which can send reverse pressure toward 450 psi and break the case lugs. And factory converter clutch apply pressure is set too low for a heavily loaded truck, which allows lockup slip and codes. The kit supplies a steel pressure regulator valve, a pressure control limit bushing with check ball that stops runaway pressure if the EPC solenoid fails, replacement converter regulator springs, a high-tension low/reverse snap ring and a pressure switch plug.
A pressure gauge tells you more than a scan tool on these trucks. TransGo gives stock line pressure as roughly 150-170 psi at light-load cruise, 200-235 psi on hard-throttle upshifts and brief spikes near 280 psi on full-throttle starts. A tune that commands about 300 psi in the forward gears will wear out the pump no matter what kit is installed, and TransGo says plainly that no fix saves the pump under that programming, so look at the calibration before you buy parts. Check the main ground as well: TransGo has documented welded-pump failures, with the inner gear fused to the pump plate, on trucks whose main ground ran to the bell housing instead of the engine block. Our 5R110 TorqShift service guide covers the pump, cooler bypass and converter checks, and the 5R110 shift solenoid symptoms guide covers solenoid testing.
Fits the 5R110W in 2003-2010 F-250, F-350, F-450 and F-550 Super Duty, Excursion and E-Series applications with the 6.0L or 6.4L Power Stroke or gas V8/V10. Inside those years Ford changed the pump twice: a 2005 redesign (casting RF5C3P, wear plate with no slots) and a third-generation pump for 2008-later that, according to Sonnax, eliminated the external cooler filter and bypass assembly. The kit's regulator parts fit the standard bore and include an oversize-bore path, so they suit every pump in this span. The photo shows the package labeled SK 5R110W, TransGo's original kit, whose instruction sheet is written for 2003-2009 units; TransGo has since released the revised SK 5R110W-A. Read the label on the box and follow the matching TransGo sheet. Send us your year and VIN if you want fitment confirmed, or see everything for this transmission in our 5R110W parts collection.
If the pump is damaged, a 5R110W pump for 2005-2010 units replaces it as a complete assembly, and a 5R110W overhaul kit covers the clutches and seals a lockup or pressure failure usually leaves behind. Fill with MERCON LV; Ford's 2009 Super Duty owner guide lists 17.5 quarts for this transmission including a remote filter change. The 5R110 rebuild wear points guide covers the rest of the inspection list.
| Fits | 5R110W 2003-10 |
| Part type | Shift Kit |
| Condition | New |
| Brand | TransGo |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The kit is aimed at controlling line pressure and firming up converter clutch apply, not at slamming gears. TransGo's original sheet lists post-install Drive pressure of 70-220 psi, which is inside normal operating range for these trucks.
It raises TCC apply pressure, which TransGo found was set too low from the factory for loaded trucks. Slip can also come from a worn converter, low cooler flow or a worn converter pressure limit valve bore, which Sonnax documents on 2005-later units, so check those during the rebuild.
Not if the tune commands around 300 psi in the forward gears. TransGo states that no fix saves the pump under that kind of programming. Have the calibration reviewed so pressure is back near stock values before the rebuilt transmission goes in.
The pump was redesigned in 2005 and again for 2008-later units, which Sonnax notes dropped the external cooler filter and bypass assembly. The shift kit fits the standard regulator bore used across these years, but never mix pump halves or wear plates between generations.
A rebuild or overhaul kit, new direct drum bushings, a filter, and enough MERCON LV for the refill. Replace the pump as a complete unit if the gears or pocket show welding, bluing or scoring.
