68RFE Tcc Solenoid, new and ready to install. Fits the 68RFE. Ships fast from the USA.
If your 6.7L Cummins Ram 2500 or 3500 with the 68RFE is shuddering at highway speed, running hot on the gauge while towing, or throwing P0740 for torque converter clutch slip, the part doing the lockup work is inside the transmission solenoid pack. On every 68RFE built before the 2019 model year there is no separate TCC solenoid: the low/reverse solenoid in the pack doubles as the converter clutch solenoid. This new Mopar unit is that complete pack, the part you are actually replacing when a pre-2019 68RFE needs a new TCC solenoid.
The 68RFE uses one solenoid, called the L/R-TCC solenoid, for two jobs. In Park, Neutral, Reverse and first gear it applies the low/reverse clutch. From second gear up, the transmission controller reuses that same solenoid to apply the converter clutch. It ramps the duty cycle up until engine speed and input shaft speed are within about 60 rpm of each other, then switches the solenoid fully on and watches for slip. ATRA's GEARS Magazine lays out this exact strategy, along with the P0740 set condition: the solenoid hits maximum duty cycle and still cannot pull the engine within 60 rpm of input speed, or slip goes past 100 rpm for 10 seconds while fully applied. The pack also carries the five pressure switches that tell the controller which clutches actually have pressure.
A pack is not always the failure behind a converter code. In the GEARS case study, a 2016 Ram 2500 with P0740 and overheating had a good pack. The real fault was a worn solenoid switch valve in the valve body plus a worn converter accumulator piston in the pump, and the valve body would not hold vacuum. Before ordering, read the codes, check fluid level hot, and watch TCC slip and transmission temperature on a scan tool during a highway drive. Our 68RFE shift solenoid symptoms and testing guide covers resistance checks and the key-on, engine-running Reverse test for the pressure switches. If the pack checks out electrically, read 68RFE valve body problems and testing before replacing anything.
This listing is for the 68RFE behind the 6.7L Cummins in Ram 2500 and 3500 trucks and the chassis cab versions. It does not list a specific year range, so match the connector before you order. The pack in the photo has a white pass-through connector. Sonnax dates the RFE connector colors as white for 2000-2009, gray for 2010-2018 and blue for 2019-on, and notes that a white pack can still service 2009-and-later valve bodies while a gray pack cannot go back onto the earlier six-solenoid design. A 2019-or-newer 68RFE with the blue connector uses a different pack, a different gasket and a separate TCC solenoid, and this part will not fit it. If you are unsure which generation is in your truck, send us the year and VIN before you buy. You can see every part we carry for this unit on the 68RFE parts page.
Common problems on these trucks, from overdrive clutch failures to cooling issues, are covered in our 68RFE Ram 2500 Cummins common problems article.
| Fits | 68RFE |
| Part type | Tcc Solenoid |
| 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.
It is the complete solenoid pack. On 68RFE units built before 2019, the low/reverse solenoid inside the pack also controls torque converter lockup, so the pack is the TCC solenoid replacement. Only 2019-and-newer 68RFE units have a standalone TCC solenoid.
No. Starting in 2019 the 68RFE uses a blue-connector pack, a different pack gasket, and a separate TCC solenoid mounted in its own housing. This white-connector pack is for the earlier valve body design.
No. A worn solenoid switch valve, a worn TCC regulator valve bore, a worn converter accumulator in the pump or a damaged converter can all set P0740. Confirm the pack with electrical tests and pressure readings before replacing it.
ATF+4. Chrysler warns against substitute fluids in the RFE family. Check the level hot with the engine running once the work is done.
Yes. Clear the stored codes and run the quick learn so the controller relearns clutch volumes with the new solenoids. Then drive the truck through several lockup cycles to confirm slip stays low.
