48RE Input Drum, new and ready to install. Fits the 48RE. Ships fast from the USA.
A Cummins Ram that pulls a heavy trailer puts more torque through its 48RE than almost any other application of the RE family, and the drums are where that load is carried from the input to the gearset. This new input drum is for a 48RE overhaul on a 2003-2007 Ram 2500 or 3500 where the old drum came out with worn lugs, damaged internal splines or a scored bushing. The listing carries no specific year, so it is up to you to match it to your unit, and the notes below show how.
Inside the 48RE's three-speed section, torque from the converter turbine comes in on the input shaft and is passed to the clutch drums. A drum carries one clutch pack: the plates engage it, the apply piston sits in it, and fluid reaches the piston through the bushing and sealing ring lands. When that piston clamps the pack, the drum locks to the next member and drives the planetary gears. The photo for this listing shows a ring-style drum with machined internal splines and feed holes, so the splines and their wear pattern are the first thing to compare against your old part.
Transmission Digest notes that the 48RE's 2003 launch brought higher-capacity clutch drums than the 46RE and 47RE used, along with a new pump stator and converter. For a Cummins truck that is the reason to run a drum built for the 48RE rather than a used core from a lighter unit.
Start with fluid level and condition, then line pressure, because a worn pump or a leaking valve body can mimic a slipping pack. The Ram 3500 Cummins common problems guide covers the usual causes on these trucks. Once the transmission is apart, clean the drum and look at the spline faces under good light, check the bushing for scoring or looseness, and air-check the assembled pack. Spline wear that lets a hub or plate rock in the drum is a replacement, not a reuse.
Listed for the 48RE with no specific year range. The 48RE was used in 2003-2007 Dodge Ram 2500 and 3500 trucks with the 5.9L Cummins. Because the listing does not name a year or revision, compare your old drum against it: spline count, outside diameter, height, number of feed holes and ring lands. If any of those differ, stop and contact us with your year, model and VIN. Other drum versions with specific year ranges are on our 48RE parts page.
| Fits | 48RE |
| Part type | Input Drum |
| Condition | New |
| Brand | OEM |
| Reference | A727 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
The 48RE was used in 2003-2007 Dodge Ram 2500 and 3500 trucks with the 5.9L Cummins. This listing does not name a year, so compare splines, diameter, height and feed holes with your old drum, or send us your VIN.
It is not recommended without checking. Chrysler raised clutch drum torque capacity when the 48RE replaced the 46RE and 47RE in 2003, so the earlier drum may not match or hold up behind a Cummins.
Look for rounded or stepped splines and lugs, a scored or loose bushing and grooved ring lands. If the assembled pack leaks air at the drum rather than the piston seals, the drum needs replacing.
New frictions and steels for that pack, piston seals and sealing rings. Most shops install it as part of a full overhaul kit and flush the cooler and lines.
ATF+4. Ram's 2006 capacity chart lists about 29-33 pints for a 48RE after an overhaul and about 8 pints for a pan service. Always finish by checking the level hot in Neutral.
