68RFE Clutch Drum 2014-2024, used and ready to install. Fits the 68RFE. Ships fast from the USA.
If your Ram 2500 or 3500 with the 6.7L Cummins is slipping in the low gears, flaring as it pulls away loaded, or you have the input clutch assembly torn down and found a cracked or distorted piston, this is the part you are looking for. Although the listing is filed under clutch drum, the actual part is the clutch drum piston that rides inside the input clutch assembly, sold under Mopar part number 4799652, which Mopar catalogs as the underdrive piston. It is a used, genuine OEM piece pulled from a 2014-2024 Ram application and is listed for the 45RFE, 545RFE and 68RFE family. You are buying the piston only, not a complete drum or clutch pack.
The 68RFE builds its gears by applying clutches rather than bands. Three of those clutches, the underdrive, overdrive and reverse packs, live together in the input clutch assembly that spins with the turbine shaft. The underdrive piston sits in that assembly. When the valve body sends underdrive pressure into the apply chamber, the piston strokes and squeezes the underdrive frictions and steels together so engine torque reaches the gearset. In this transmission family the underdrive clutch is the one doing the work in the lower gears, first through third, so it carries a heavy share of the load every time a loaded truck pulls away. When the pressure is exhausted, the return springs push the piston back off the pack.
Because the piston is a stamped steel part working against high apply pressure, it can crack at the stamped ribs, warp from heat, or wear where it seals. Any of those lets pressure bleed off, and a pack that is not fully clamped starts to slip and burn.
A slipping 68RFE has many causes, so start outside the case. Check the fluid level and condition with the correct ATF+4, scan for codes, and look at line pressure and clutch volume indexes on a capable scan tool. Overdrive clutch failure is the best-known 68RFE weak spot and can feel similar on the road; our 68RFE 3-4 clutch failure guide explains how to tell those cases apart, and the Ram 2500 Cummins common problems guide covers the rest of the usual suspects. With the transmission on the bench, air-check the underdrive circuit through the input clutch assembly. A piston that leaks, will not stroke, or shows a crack once the pack is apart is the one to replace.
This piston is listed for 2014-2024 Ram trucks with the 68RFE and carries the OEM number 4799652, the same number cross-listed for the 45RFE and 545RFE. The RFE family went through several updates, so the safest check is to match the number, or the shape of the piston you are removing, including the rib pattern and the inner and outer diameters, before you install it. If you are not sure, send us your year and VIN and we will confirm it. Other parts for this transmission are on our 68RFE parts page.
This is a used part, so inspect it before it goes in: look for cracks around the stamped ribs, check that it sits flat, and clean the sealing surfaces. Replace every seal and O-ring in the input clutch assembly while it is apart; a gasket and seal set like the 68RFE overhaul kit covers them, and burnt underdrive frictions and steels should be replaced rather than reused. If the drum itself is scored or cracked, a replacement 68RFE input drum is the better fix. Lubricate the seals with ATF+4 or assembly gel, air-check the underdrive, overdrive and reverse circuits before the assembly goes back in the case, and set the clutch clearance to the factory service manual figure. Refill with ATF+4 only and check the level with the fluid at full operating temperature. After any internal repair, run the quick learn procedure with a scan tool so the computer relearns clutch fill times.
| Fits | 68RFE 2014-2024 |
| Part type | Clutch Drum |
| Condition | Used |
| Brand | OEM |
| Reference | 4799652 |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. Despite the listing name, this is the clutch drum piston, OEM number 4799652, which Mopar catalogs as the underdrive piston. The drum, clutches, springs and seals are not included.
It is listed for 2014-2024 Ram 68RFE trucks and the same number is cross-listed for the 45RFE and 545RFE. Match the 4799652 number or compare it side by side with your old piston, or send us your year and VIN before ordering.
It is a used genuine OEM part. Inspect it for cracks and flatness before installing, and always fit new seals in the input clutch assembly.
Replace all seals and O-rings in the input clutch assembly and any burnt underdrive frictions and steels. If the transmission made metal, also replace the filter and flush the cooler and lines.
ATF+4 only. Set the level with the fluid at full operating temperature, then perform the quick learn with a scan tool after the repair.
