545RFE Clutch Drum 2014-2024, used and ready to install. Fits the 545RFE. Ships fast from the USA.
This listing is filed under clutch drum, but the part itself is the genuine Mopar underdrive clutch piston, part number 4799652, the piston that rides inside the input clutch retainer and squeezes the underdrive pack. It is listed as used condition and was catalogued for 2014-2024 Ram trucks, with the same number called out for the 545RFE, 45RFE and 68RFE. If your 545RFE in a Durango, Grand Cherokee, Commander or Ram 1500 flares between gears, feels soft in first through third, or a teardown showed a torn piston seal or a cracked apply surface, this is the factory piece that fixes it without buying a whole drum.
The 545RFE has no bands. Every ratio comes from two clutches applied together, and three of them, underdrive, overdrive and reverse, live in the input clutch retainer that spins with the input shaft. The underdrive piston is the hydraulic apply for the UD pack. According to Chrysler's 545RFE clutch application chart, the UD clutch is on in first, second, second prime and third, so it carries engine torque every time the truck pulls away from a stop and through the low-speed shifts. If the piston cannot hold pressure, every one of those gears suffers at once while fourth and fifth can still feel normal.
Read the codes and watch which gears slip. A slip that follows the UD clutch across first to third points inside the input retainer, while a slip only in third, fourth and fifth points at the overdrive circuit, which is covered in our 45RFE 3-4 clutch failure guide. Rule out low fluid and line pressure first; the 45RFE and 545RFE problems and fixes page walks through the common faults. With the unit apart, an air check of the UD circuit should give a firm clutch apply with no hiss past the piston. A leak there, a damaged lip seal or a cracked piston means the piston gets replaced.
The listing ties this piston to 2014-2024 Ram applications and names the 45RFE, 545RFE and 68RFE under Mopar 4799652. The 545RFE ran in Ram 1500, Durango, Grand Cherokee and Commander models, and Chrysler revised the input retainer and pressure plates over the years, so set your old piston next to this one before you assemble: diameter, seal lip location and the number stamped on the part should match. If you are not sure which revision you have, send your year and VIN and we will check it. Other 545RFE parts are on the 45RFE / 545RFE collection page.
Since the retainer is open anyway, this is the time to replace the UD frictions and steels. The 45RFE master rebuild kit carries the frictions and seals, and if the retainer itself is cracked or worn at the lugs, the 545RFE input drum for 2007-2017 replaces the housing.
| Fits | 545RFE 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. It is the Mopar 4799652 underdrive piston that sits inside the input clutch retainer. If the retainer housing is cracked or worn, you need the input drum as well.
In the 545RFE the underdrive clutch is applied in first, second, second prime and third. A weak UD piston shows up as slipping in those gears while fourth and fifth still hold.
The listing names the 45RFE, 545RFE and 68RFE under Mopar 4799652. Compare the old piston and its stamped number before assembly, or send year and VIN so we can confirm.
Replace the UD frictions and steels and every seal in the input retainer at the same time. A master rebuild kit covers those parts.
Mopar ATF+4. After assembly, run a quick learn with a scan tool so the controller resets clutch volume values, then drive it through normal shifts to finish the adaptive learn.
