68RFE Reaction Shell 2010-2018, remanufactured and ready to install. Fits the 68RFE. Ships fast from the USA.
A quick correction before anything else: although this page is titled as a reaction shell, the part you receive is a heavy-duty remanufactured valve body for the 68RFE (it also fits the 66RFE), 2010-2018, 5-check-ball style. It is aimed at the Ram 2500 and 3500 6.7L Cummins owner who tows, has started seeing pressure switch or switch valve codes, and is tired of a transmission that goes into limp mode on a long grade with a trailer behind it. If you need the actual planetary reaction shell, contact us and we will point you to the right part.
The 68RFE is computer-shifted. The TCM energizes the solenoid block, and the valve body underneath it meters oil to the underdrive, overdrive, 2-4, low/reverse and converter clutches. Behind a high-torque diesel, any pressure lost in that casting shows up as slip in the clutch that is trying to hold the load. Sonnax traces repeat overdrive clutch failures in the 68RFE to a short list of causes, and the solenoid switch valve and its bore plugs are on it: when that valve leaks, overdrive apply pressure drops right when the truck is working hardest. GEARS Magazine notes a healthy 68RFE should show roughly 60 to 70 psi line pressure, commanded and actual, at idle; a worn valve body is one way that number stops matching.
This remanufactured unit is built with the upgrades a tower would want:
The solenoid block is not part of the package.
Start with fluid at full temperature and a code scan with freeze frame. If the trouble is electrical - an open solenoid, a corroded connector, a speed sensor dropping out - a new valve body will not fix it. Our 68RFE Ram 3500 Cummins shift problems guide lays out the order of checks, and if heat is part of the story, read 68RFE Ram 2500 Cummins common problems for the cooler and bypass valve side of it. Low line pressure can also come from the pump, so rule that out with the steps in 68RFE pump failure symptoms.
Listed for 2010-2018 68RFE and 66RFE transmissions with the 5-check-ball valve body. A 2010-2018 truck should have the gray pass-through solenoid connector described by Transmission Digest; 2019 and newer units use the blue connector, an added reverse solenoid and a separate TCC solenoid, and they do not take this valve body. TransGo dates its 5-ball kits to 2011-2018, so a 2010 truck deserves a check-ball count before ordering. Give us your year and VIN if you want a second set of eyes on it, or see everything we carry on the 68RFE parts page.
| Fits | 68RFE 2010-2018 |
| Part type | Reaction Shell |
| Condition | Remanufactured |
| 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.
A valve body. The listing title is wrong; the part is a remanufactured heavy-duty 68RFE/66RFE 5-check-ball valve body for 2010-2018. It does not include a reaction shell or solenoid block.
It fixes the valve body causes - switch valve leakage and accumulator wear - that starve the overdrive clutch of pressure. Burned clutches themselves still need to be replaced, and overheating and pump wear should be checked too.
No. 2019-up 68RFE units use the blue-connector solenoid assembly with a separate TCC solenoid and a different gasket layout. This valve body is for gray-connector 2010-2018 units.
ATF+4 only. Check the level hot, at 160 degrees F or above, with the engine running and the selector in Park.
Yes. Clear codes and run the quick learn so the TCM relearns clutch volumes, then put a few light shift cycles on it before pulling a trailer.
