4R44E Input Drum, used and ready to install. Fits the 4R44E. Ships fast from the USA.
If your four-cylinder or 3.0L Ford Ranger or Mazda B-Series will not pull into overdrive, flares on the 3-4 shift, or freewheels on a downhill coast in manual ranges, the front section of the 4R44E is where the trouble usually lives. This listing is that front section: a used OEM overdrive drum together with the overdrive planetary assembly, the parts that sit right behind the pump and take power straight from the turbine shaft. That is why it is sold as the input drum. What you receive is what the photo shows: the drum, the planetary carrier, the sun gear and the ring gear with its shaft.
Ford built the A4LD by adding an overdrive unit to the front of the three-speed C3, and the 4R44E kept that layout when it went fully electronic for 1995. Everything behind this front gearset is basically the old three-speed. In first through third, the overdrive one-way clutch locks the gearset so it turns as one piece and passes engine speed straight back. For fourth, the overdrive band clamps the outside of this drum, which stops the sun gear, and the planetary spins the output faster than the engine for the 0.75 overdrive ratio. The coast clutch lives inside the same drum. When it applies, it ties the gearset together so the one-way clutch cannot overrun, which is what gives you engine braking in manual ranges. One drum, three jobs: band surface, coast clutch housing, and sun gear driver.
Lost overdrive is not always hard parts. Sonnax notes that leakage at the coast clutch valve can take out fourth or engine braking, and that EPC circuit problems can break bands. Put a gauge on the unit first; our line pressure testing guide walks through the hookup. If pressure is right and fourth still slips, pull the pan and read the debris, then use the slipping diagnosis guide to separate a band problem from a clutch problem. Once the unit is apart, The Ranger Station's advice for this family applies: the overdrive drum is stamped steel, so replace it if it is out of round or heat damaged.
The 4R44E was the light-duty version, used behind the 2.3L four-cylinder and 3.0L V6 in the 1995-2001 Ranger and Mazda B-Series, and it also appeared in the 1995-1997 Aerostar. This set comes from the A4LD-based 4R44E, 4R55E, 5R44E and 5R55E family, but the 4R55E was built with a larger overdrive drum and more clutch capacity for the 4.0L, so the 4R44E and 4R55E pieces are not automatically interchangeable. Compare your old drum and planetary to the photo before you order, or send us your year and VIN and we will check it. You can also browse other 4R44E planetary parts.
Clean the drum and check the band surface for scoring and the bushing and sealing ring surfaces for wear. Install new coast clutch frictions, steels and piston seals, air-check the coast clutch piston before the unit goes in, and set the clutch clearance to spec. A new overdrive band is cheap insurance; the 4R44E master rebuild kit for 1995-1996 covers the soft parts, or the overhaul kit if you only need gaskets and seals. Flush the cooler and lines before refill so old debris does not come back in, as covered in flushing a cooler after a failure. Refill with MERCON V; Motorcraft MERCON V is the factory-type fluid.
| Fits | 4R44E |
| Part type | Input Drum |
| Condition | Used |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
It is the overdrive drum together with the overdrive planetary assembly, as shown in the photo: drum, planetary carrier, sun gear and ring gear with shaft. Only the items in the photo are included.
Not safely without checking. The 4R55E used a larger overdrive drum and more clutch capacity for the 4.0L. Match your old parts to the photo or send your year and VIN before ordering.
No fourth gear or a slipping 3-4 shift, no engine braking in manual ranges, a burnt overdrive band, or metal debris in the pan. Check line pressure and the coast clutch valve first, because valve body leaks cause the same complaints.
Coast clutch frictions, steels and piston seals, the overdrive band, and the sealing rings. A master rebuild kit covers these. Flush the cooler before refilling.
MERCON V is the recommended fluid for this family. Fill with the engine running and check the level hot.
