5R110W Shift Kit 2003, new and ready to install. Fits the 5R110W. Ships fast from the USA.
A 2003 Ford with the 5R110W TorqShift is now more than twenty years old, and the complaints these first-year units bring in are predictable: reverse that slips or disappears, a truck that will not move after a hard engagement, a drop into neutral at stop signs, and converter clutch slip once it is loaded. This TransGo shift kit is listed for the 2003 model year 5R110W, the first year Ford put the five-speed TorqShift in the Super Duty and Excursion.
The 5R110W sets line pressure with a pressure regulator valve that sits in the pump and takes its signal from the PC-A line pressure solenoid in the solenoid body. When the pump casting distorts and that valve hangs up, pressure either collapses or runs away. TransGo's instructions put typical runaway reverse pressure near 450 psi with the throttle on, which is what tears the low/reverse snap ring lugs off the case. The kit replaces the regulator lineup with a hardened steel valve, adds a pressure control limit bushing that caps pressure if the EPC solenoid sticks, supplies new converter regulator springs to raise lockup apply pressure, and includes a high-tension low/reverse snap ring that TransGo rates at 400 percent tougher than stock.
Check line pressure with a 600 psi gauge at the line tap in every range, including reverse with some throttle. Readings well above TransGo's post-kit Reverse range of 100-320 psi point straight at the regulator and pressure control circuit this kit fixes. Rule out the solenoid body and wiring next, since an electrical fault in pressure control solenoid A on these trucks sets P0753; our 5R110 shift solenoid symptoms guide explains how to test each solenoid. If reverse is already lost, inspect the low/reverse case lugs before you spend money on anything else.
This listing is for 2003 5R110W transmissions in the F-250, F-350, F-450 and F-550 Super Duty and the Excursion, behind the 6.0L Power Stroke or the gas V8 and V10. Not every 2003 Super Duty has it: early 2003 trucks with the 7.3L Power Stroke kept the four-speed 4R100, so read the transmission tag or send us your VIN before ordering. The same kit design carries forward to later TorqShifts, so if your build date is borderline, compare our 2003-2016 5R110W shift kit and the rest of our 5R110W TorqShift parts.
For a first-year unit, most shops pair the kit with a 2003-04 5R110W master rebuild kit and replace the direct drum bushings, which TransGo warns can look fine and still be worn out. If the early pump is damaged, a complete replacement 5R110W pump avoids any half-and-half mismatch. Fill with MERCON LV, which Ford now authorizes for full refill of the 5R110W. Our 5R110 rebuild wear points guide covers the other early-unit weak spots.
| Fits | 5R110W 2003 |
| 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.
Engine is the first clue: 6.0L Power Stroke trucks have the five-speed 5R110W, while early 2003 trucks with the 7.3L Power Stroke kept the four-speed 4R100. The transmission identification tag on the case settles it, or send us the VIN and we will check.
Sonnax notes the computer on these trucks was never programmed to monitor the pressure switches, which is why Ford later removed them. The kit includes one aluminum plug for a damaged switch or dummy plug; TransGo sells a five-plug pack (5R1-PLUG-PS) separately if you find more than one damaged.
A complete pump can be swapped across years. What you cannot do is mix a 2003-04 pump body, stator or two-slot wear plate with 2005-later pieces, because TransGo lists that mismatch as a cause of no movement after a repair.
It can if the low/reverse case lugs are still present. Lugs worn at an angle can be saved by the tougher snap ring; lugs that have broken off mean the case must be replaced first.
Usually a full rebuild kit with clutches and seals, the direct drum bushings, any damaged pressure switch, and a new filter. If the pump gears or pocket show welding or scoring, replace the pump as a complete assembly.
