66RFE Clutch Drum 2005, used and ready to install. Fits the 66RFE. Ships fast from the USA.
When a Ram with an RFE transmission slips in some gears but pulls fine in others, the problem is often one holding clutch, and that clutch lives in this drum. This is a used, complete 2-4 clutch drum that came out of a 2005 transmission. It carries OE reference 4799648AE and is listed as interchangeable across the 45RFE, 66RFE and 68RFE families. If your teardown found a cracked drum, a burned 2C or 4C pack, or a piston bore that will not hold air, this replaces the housing those clutches ride in.
The RFE family uses six clutches. Three are driving clutches in the input housing: underdrive, overdrive and reverse. The other three are holding clutches that lock a planetary member to the case, and ATSG names them the 2nd clutch (2C), the 4th clutch (4C) and the low/reverse clutch. This drum is the 2-4 assembly that houses the 2C and 4C packs. In the 66RFE and 68RFE, Chrysler's apply chart pairs them like this:
So each pack works in two gears. That pattern is the best diagnostic tool you have, because slip that follows a pair of gears points straight at one clutch in this drum. The 45RFE and 545RFE use the same 2C and 4C holding clutches, but their shorter gear sets assign them to different ranges.
Burned 2C or 4C clutches are often a symptom of a hydraulic problem, so prove the circuit before you replace the drum. Check fluid level hot, scan for codes, and note exactly which gears slip. If 2nd and 3rd both slip, underdrive is the shared element, not this drum. Our 66RFE slipping guide lays out the gear-by-gear logic, and the 66RFE P0733 guide covers the 3rd gear ratio code that often leads back to the 4C pack. Once the unit is apart, air check the 2C and 4C pistons and look for cracks around the bolt bosses and piston bores.
This drum came from a 2005 model year transmission and is listed for 45RFE, 66RFE and 68RFE use. The 66RFE itself went into 2012-2018 Ram 2500, Power Wagon and 3500 chassis cab gas trucks, and the 68RFE into Ram 2500 and 3500 Cummins pickups from 2007. RFE parts had running changes, so do not rely on the year alone. Match the OE number 4799648AE if yours is visible, compare bolt pattern, piston bore and lug details to the photo, or send us your year and VIN and we will confirm before shipping. See the full lineup on our 66RFE parts page.
| Fits | 66RFE 2005 |
| Part type | Clutch 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.
The 2nd clutch (2C) and 4th clutch (4C), two of the three holding clutches in the RFE family. The low/reverse clutch and the input clutches are separate assemblies.
It is listed as interchangeable across the 45RFE, 66RFE and 68RFE. Because RFE parts changed over the years, match the OE number 4799648AE or compare your old drum to the photo, or send us your year and VIN to confirm.
Slip in 3rd and 5th points at the 4C clutch, which sits in this drum. Check line pressure and the valve body first, since a hydraulic leak can burn a good pack.
New frictions and steels for 2C and 4C, piston seals, filters and a cooler flush. Most people do it as part of a full overhaul.
No, it is a used complete drum. It is covered by our 1-year warranty.
