68RFE Sprag Clutch 2008, used and ready to install. Fits the 68RFE. Ships fast from the USA.
A 2008 Ram 2500 or 3500 with the 6.7L Cummins that will not pull away in Drive, or that flares on a loaded launch and then catches once it hits second, usually needs its low/reverse one-way clutch checked. This is a used factory low/reverse one-way clutch assembly taken out of a 2008 Ram diesel 68RFE when the transmission was parted out. It comes as the complete holding assembly, not just a set of loose elements, which makes it the right choice when your old race is damaged and a rebuild kit alone would not fix it.
Ram's specifications describe the 68RFE as three planetary gearsets and a single overrunning clutch, and this is that clutch. First gear in Drive is made with the underdrive clutch driving and this one-way clutch holding. The hydraulic low/reverse clutch only helps at a crawl; ATSG notes it is applied below about 150 rpm output speed in first gear and then released, so from there until the 1-2 shift the sprag is carrying the reaction torque of a Cummins diesel on its own. On the upshift to second, it overruns instead of being released, which is why the 1-2 shift needs no clutch-to-clutch timing. Heavy launches with a trailer, high-torque tuning, and wheel hop are hard on it for that reason.
Rule out the hydraulic side first. Sonnax documents wear in the low/reverse switch valve bore on the 68RFE that leaks low/reverse clutch apply pressure, which can cause a burnt low/reverse clutch and delayed or missing reverse, first, or second. If reverse is delayed too, suspect the valve body before the sprag; our 68RFE valve body testing guide walks through it. If reverse is crisp, the truck pulls in low, and only Drive first slips, the one-way clutch is the likely cause. Check line pressure and fluid level hot as well; the 68RFE pump failure guide lists the healthy idle values.
This assembly came out of a 2008 Ram 2500/3500 6.7L Cummins with the 68RFE, so it matches the early 68RFE trucks built from 2007.5 on. Chrysler revised the 68RFE several times in later years, and the aftermarket offers heavy-duty sprags and roller-clutch replacements for this position, so lay your old assembly next to the photos and match the spline count, lug count and outside diameter before you order, or send us your year and VIN. Everything else for this transmission is on our 68RFE parts page.
| Fits | 68RFE 2008 |
| Part type | Sprag Clutch |
| 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.
It is the complete low/reverse one-way clutch assembly as it came out of a 2008 Ram 6.7L Cummins 68RFE, so it is a good choice when the old race is worn or damaged.
Early 68RFE trucks share this design, but Chrysler revised parts over the years. Match the spline count, lug count and size with your original part, or send us the VIN.
Probably not by itself. The sprag does nothing in reverse. Losing reverse and first together points toward the low/reverse clutch circuit or switch valve, so test the valve body first.
In Drive the low/reverse clutch releases almost right away, so the one-way clutch holds first gear by itself with full diesel torque, especially during towing launches.
ATF+4, checked at 160 degrees F or hotter. Run the quick learn with a scan tool after the rebuild.
