4R75W Input Drum 2004, remanufactured and ready to install. Fits the 4R75W. Ships fast from the USA.
If your 2004 Ford with the 4R75W suddenly has no Drive, slips in first through third, or throws gear ratio codes while Reverse still pulls, the input drum is one of the first hard parts a rebuilder checks. This listing is a remanufactured 2004-up 4R75W input drum: the forward clutch drum on its long splined input shaft, the version built for the late-design 4R75W case and geartrain.
In the 4R70W family the input drum is the forward clutch drum. Engine power comes off the converter, through the input shaft, and into this drum, which houses the forward clutch piston and plate pack. When the forward clutch applies it drives the forward sun gear in the planetary, so this drum is carrying torque in first, second and third gear in Drive. It is released in fourth and is not used in Reverse, which is why a failed forward drum often leaves you with a working Reverse and a dead or slipping Drive.
Sonnax describes forward clutch drum breakage as a chronic problem across the AOD, AODE and 4R70W series. That is the heart of it: the drum takes a beating from torque spikes and from low apply pressure that lets the pack slip and overheat.
Start with line pressure and the fluid. Low line pressure from EPC or pressure regulator problems burns forward clutches and can make a good drum look bad, so check pressure against spec before condemning hard parts. Our 4R70W Crown Victoria common problems guide covers the EPC and pressure regulator bore wear that feeds these failures. Once the unit is apart, inspect the drum for cracks around the apply area, worn splines, a scored bushing and damaged sealing ring grooves, and air-check the piston. If you are also chasing a 3-4 shift complaint, read our 4R70W 3-4 clutch failure guide so you do not miss a direct drum problem at the same time.
This drum is listed for the 2004 4R75W. ATRA's interchange notes show that starting in 2004 the forward drum was made with three clutch apply holes spaced 120 degrees apart instead of the single hole used before, a change ATRA calls cosmetic for forward clutch apply. The bigger reason to keep a 2004 unit matched is everything around the drum: 2004 brought a new ring gear and output speed sensor that do not interchange with earlier parts, and later sun shells changed too. Build the geartrain from parts of the same era. Match your old drum's shaft length, spline count and apply-hole pattern against the photo, or send us your year and VIN and we will confirm it before it ships. You can see every 4R70W and 4R75W part we carry on the 4R70W/4R75W collection page. For 2003 and earlier, see the 2003 4R75W input drum.
| Fits | 4R75W 2004 |
| Part type | Input Drum |
| 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.
Yes. In the 4R70W and 4R75W the input drum is the forward clutch drum. It rides on the long input shaft and holds the forward clutch piston and plates that drive the transmission in first through third gear.
ATRA notes the 2004-on forward drum gained two extra apply holes and that the change does not affect forward clutch apply. Even so, the 2004 ring gear and output speed sensor do not interchange with earlier parts, so keep the build matched to its year. Send us your year and VIN and we will confirm before shipping.
It is a strong suspect, because the forward clutch works in Drive but not in Reverse. Check fluid level and line pressure first, since low pressure from EPC or pressure regulator wear can burn the forward clutch without the drum itself failing.
New forward clutch frictions, steels and piston seals at minimum, plus the sealing rings. If the old drum broke, inspect the forward sun gear and reaction shell and flush the cooler, because metal from a failed drum spreads through the unit.
MERCON V automatic transmission fluid. Ford says not to use MERCON V in vehicles that call for MERCON SP, LV or ULV, so check the owner guide for your exact vehicle.
