5R110W Overhaul Kit 2005, new and ready to install. Fits the 5R110W. Ships fast from the USA.
When a 2005 Super Duty or Excursion with the 5R110W TorqShift starts leaking, flaring on the 3-5 shift, slipping in Reverse or taking its time to engage on a cold start, and the unit is coming out for a rebuild, this is the kit that reseals it. It is a new overhaul kit for the 2005 5R110W, the five-speed Ford put behind the 6.0L Power Stroke and the big gas engines in its heavy-duty trucks.
The TorqShift has no shift valves in the conventional sense. Seven variable force solenoids command each clutch directly, with the forward clutch fed through the manual valve. That design only works if every apply circuit holds the pressure the solenoid asks for, so worn piston seals and sealing rings show up quickly as flare, slip and shift codes. An overhaul kit replaces the pan and case gaskets, clutch piston seals, drum and shaft sealing rings and O-rings that keep those circuits tight. Kits of this type are the soft parts; frictions and steels are sold in master kits, so confirm the contents in the photos before teardown.
Scan for codes and record live data on a road test, because the gear the driver names is often not the shift that is failing. Put a transducer on the line pressure port; the computer raises line pressure sharply during each shift, and a circuit that cannot hold it is a sealing or clutch problem rather than a solenoid fault. Our 5R110 shift solenoid testing guide separates electrical faults from hydraulic ones, and the 5R110 rebuild wear points guide lists the parts that fail on the bench.
This kit is listed for the 2005 5R110W, used in 2005 F-250, F-350, F-450 and F-550 Super Duty trucks and the Excursion with the 6.0L Power Stroke, 5.4L or 6.8L V10. 2005 matters for two reasons. Ford dropped the solenoid body pressure switches in late 2004, so most 2005 units carry the later body, and 2005 is before the 2008 change from the external bypass cooler filter to a redesigned sump filter, which also changed the pump. Mid-life revisions like these change a few parts, so match the kit to your teardown or send us your year and VIN before ordering. The rest of the TorqShift catalog is on our 5R110W parts page.
Soak the lip seals in clean fluid, use assembly gel on the sealing rings, and air-check each clutch as it is built. Replace the low/reverse retaining ring with a higher-tension ring and inspect the case lugs for witness marks. Vacuum test the valve body bores, and check the pump pressure regulator bore and bushing while the pump is apart. Retest or replace the solenoids, since there are no valves to cover for a weak one; the 5R110W pressure control solenoid is a common replacement. Ford calls for replacing the oil-to-air cooler rather than back-flushing it, and the external bypass filter on a 2005 unit should be renewed. Install a new 5R110W filter kit and refill with MERCON SP.
| Fits | 5R110W 2005 |
| Part type | Overhaul 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.
No. An overhaul kit is the gasket and seal package. Frictions and steels come in a master rebuild kit, so check the kit contents in the photos and order clutches separately if needed.
Many seals carry across the 2005-2007 units, but Ford made running changes to the pump, filtration and planetary parts. Send your year and VIN and we will confirm before it ships.
Refill with MERCON SP, the fluid Ford specified for the 5R110W, and replace the filter and cooler-circuit filter at the same time.
A common cause is the low/reverse retaining ring walking out of its case groove. Replace it with a higher-tension ring during the rebuild and check the case lugs for damage.
Ford's guidance for this unit is to replace the oil-to-air cooler as part of an overhaul rather than back-flush it, because debris left behind goes straight into the solenoids.
