48RE Input Drum 2003-2007, used and ready to install. Fits the 48RE. Ships fast from the USA.
A heavy-duty Ram that has spent years towing behind a 5.9L Cummins puts more torque through the input shaft than almost any other part of the transmission. When the shaft splines strip, the shaft twists, or the drum it sits in cracks, the truck can lose drive completely. This listing is a used OEM 48RE input drum for 2003-2007, photographed as the input shaft and rear clutch housing together, with the hub hand-marked 48RE. It is the part to buy when your teardown finds a damaged shaft or drum and the rest of the hard parts are reusable.
The converter turbine drives the input shaft, and the shaft drives the drum that houses the rear (forward) clutch. ATSG lists that rear clutch, the front (direct) clutch and the OD/direct clutch as the three input driving components in the 46RE, 47RE and 48RE. With the rear clutch applied, input torque reaches the front planetary for first, second and third, and the overdrive unit at the back of the case adds fourth. The shaft also carries the sealing rings that route apply oil into the drum, so worn ring grooves are as much a failure as a broken spline.
Transmission Digest notes that Chrysler increased clutch drum torque capacity when it moved heavy-duty trucks to the 48RE in 2003. That is a good reason to replace a damaged 48RE input drum with a 48RE part instead of one pulled from a lighter 46RE.
Pull the pan and look at the debris first. If the converter hub and pump are healthy, a line pressure test that is good in Reverse but low in Drive points to the forward clutch circuit. Once the unit is apart, check the turbine and pump-side splines on the shaft for twisting or rounding, look for cracks at the drum lugs, and inspect the ring grooves and bushing journal. Our 48RE Ram 2500 Cummins common problems and 48RE Ram 3500 shift problems guides cover the related symptoms.
Per ATSG, the 48RE went into the 2003-2007 Dodge Ram pickup with the 5.9L diesel and the 8.0L V10, and this input drum is listed for those years. Compare the overall shaft length, both spline counts and the drum itself with your original before installing. If anything differs, stop and send us your year and VIN. You can also see this assembly listed as the 48RE clutch drum for 2003-2007 and browse the full 48RE parts collection.
Replace the shaft sealing rings, the rear clutch piston seals and the clutch pack, and check the thrust washers on either side of the drum. Pre-soak frictions in ATF+4, air-check the piston, and set clearance with the selective snap ring. Seat the converter fully on the new shaft splines before bolting the case to the engine. If the old shaft failed from heavy towing, a 48RE shift kit for 2003-08 firms up apply pressure, and a 48RE solenoid and filter service kit covers the filter and gasket. Refill with ATF+4, roughly 29-33 pints after an overhaul per Chrysler, and check the level hot in Neutral.
| Fits | 48RE 2003-2007 |
| Part type | Input Drum |
| Condition | Used |
| 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. It is photographed with the input shaft installed in the rear clutch housing. Clutches, steels and seals are not shown and should be replaced new.
Dodge Ram 2500 and 3500 pickups with the 5.9L Cummins diesel, and Ram pickups with the 8.0L V10. Confirm with your year and VIN if you are not sure which transmission you have.
It is not recommended. Chrysler raised clutch drum torque capacity on the 48RE, and shaft dimensions vary in the RE family, so match it to your original 48RE part.
Heavy towing, high-power tuning, and a converter that was not fully seated on install. Find and fix the cause or the replacement shaft is at risk.
Mopar ATF+4. Set the level hot with the engine idling and the selector in Neutral.
