68RFE Sprag Clutch 2007-2020, new and ready to install. Fits the 68RFE. Ships fast from the USA.
A 6.7L Cummins Ram that will not pull away in Drive, flares on takeoff, or feels like it is in neutral until it grabs second is often pointing at the one part in the 68RFE that has no hydraulics at all: the overrunning clutch, often called the sprag. This is a new Mopar overrunning clutch listed for 2007 through 2020 68RFE transmissions, the six-speed behind the Cummins in the Ram 2500 and 3500 and the 4500 and 5500 chassis cabs.
Ram's own specifications describe the 68RFE as three planetary gearsets, one overrunning clutch and full electronic control. That single one-way clutch carries first gear. In Drive, first gear uses the underdrive clutch plus the overrunning clutch; the low/reverse clutch is only applied at very low output speed, below about 150 rpm according to ATSG, and then releases. From that point the overrunning clutch is holding the gearset alone. When the transmission shifts to second, the overrunning clutch simply freewheels, so the 1-2 shift needs no clutch-to-clutch timing. In manual low, the low/reverse clutch stays applied to give engine braking. On a diesel that puts the full launch torque of the Cummins through this part every time the truck pulls away with a load behind it.
That last symptom is the best quick test. Manual low holds the low/reverse clutch on, so the truck can still pull even with a slipping one-way clutch. In Drive the clutch releases almost immediately, so the overrunning clutch is on its own. If the truck pulls in low but slips in Drive first, and reverse is fine, the sprag is the prime suspect. Rule out the simple things first: fluid level checked hot, and line pressure on a scan tool, since a weak pump or low pressure can also cause a slip in first. Our 68RFE pump failure guide covers the pressure checks, and the speed sensor guide explains why a bad input or output sensor can set a ratio code on a healthy transmission.
The listing covers 68RFE transmissions from 2007 through 2020, in Ram 2500 and 3500 pickups and Ram 4500 and 5500 chassis cabs with the 6.7L Cummins. The 68RFE was revised several times in that span, including the 2019 solenoid and valve body redesign, so compare the outer and inner spline counts and the overall size of your old part before installing, or match the Mopar number on your original. Send us your year and VIN if you want us to check it. Other parts for this transmission are on our 68RFE parts page.
| Fits | 68RFE 2007-2020 |
| Part type | Sprag Clutch |
| Condition | New |
| Brand | Mopar |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes. On the 68RFE the one-way clutch that holds first gear is called the overrunning clutch in Chrysler service information, and many shops call it the sprag.
Manual low keeps the low/reverse clutch applied, so the truck can still pull. In Drive that clutch releases at very low speed and only the overrunning clutch holds first gear. Slipping in Drive first is a classic sign of a failed overrunning clutch.
No. It sits inside the geartrain, so the transmission has to be removed and disassembled.
The listing covers 2007 through 2020. Compare the spline count and size with your original, or send us the VIN and we will check it.
A gasket and seal kit, filters, ATF+4, and any worn clutch frictions. If the low/reverse clutch is burnt, replace it too, and clean the cooler.
