45RFE Clutch Drum 2014-2024, used and ready to install. Fits the 45RFE. Ships fast from the USA.
Shopping for a 45RFE clutch drum because your Ram 1500, Dakota, Durango, Liberty or Grand Cherokee slips pulling away and through the first few shifts? Check the piston before you buy a whole drum. This page covers the genuine Mopar underdrive piston, part 4799652, listed in used condition. It was pulled under a 2014-2024 Ram listing, which is where the year range in the title comes from, and the same Mopar number is called out for the 45RFE, 545RFE and 68RFE. For a 45RFE the piston is a straight factory replacement for one that is cracked, leaking or has a damaged seal.
The 45RFE is a clutch-to-clutch four-speed with the input clutch retainer holding three packs: underdrive, overdrive and reverse. Oil from the valve body pushes the UD piston against its pack to tie the input to the underdrive gear path. The UD clutch is applied from first gear through third, so on a 45RFE it is working in most of the city driving a truck does. Third is the shift where the UD and OD clutches are both on, giving the 1.0:1 direct ratio listed in Chrysler's specifications, which is why a weak UD piston can feel like a bad 2-3 shift.
Check fluid level and condition, then pull codes and note exactly which gears slip. The 45RFE shares the solenoid switch valve and valve body wear problems of the whole RFE family, and a pressure fault can mimic a clutch fault, so work through the 45RFE / 545RFE valve body testing guide and the pressure control solenoid and line pressure guide first. When the unit is on the bench, air check the UD apply passage. The pack should apply with a solid thump and release cleanly; air hissing past the piston means a seal or piston failure.
The listing gives 2014-2024 and names the 45RFE among the transmissions that use Mopar 4799652. The 45RFE itself was built for 1999-2009 Ram 1500, Dakota, Durango, Grand Cherokee, Commander and Liberty, and Chrysler made running changes to the input retainer, pressure plates and snap rings during that time. Hold the old piston against this one and check diameter, seal position and the stamped number before installing. If anything looks different, send your year and VIN before the transmission goes back together. The rest of our 45RFE parts are on the 45RFE collection page.
New UD frictions and steels belong in the same job; the 45RFE master rebuild kit for Dodge Ram and Jeep covers them along with the seals. If the drum has worn lugs or a cracked hub, replace it with the 45RFE input drum for 1999-2007.
| Fits | 45RFE 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.
That range comes from the Ram application the piston was listed under. The same Mopar 4799652 number is called out for the 45RFE, 545RFE and 68RFE. Match the old piston or send year and VIN to confirm.
No, it is the underdrive piston only. It installs inside the input clutch retainer. Order the input drum separately if the housing is damaged.
Yes. The underdrive clutch applies in first through third, so a leaking UD piston usually shows up as slip in those gears while fourth still holds.
Chrysler lists 0.84-1.54 mm (0.033-0.061 in.) for the UD clutch pack, set with the select snap ring.
Mopar ATF+4. Run a quick learn after the repair so the controller resets its clutch fill values.
