68RFE Transmission Cooler 2013-2018, new and ready to install. Fits the 68RFE. Ships fast from the USA.
Searching for a 68RFE transmission cooler for a 2013-2018 Ram 6.7L Cummins because the trans runs hot? Read this first: this listing is not a cooler core. It is the ATS thermal bypass valve upgrade, ATS part number 310-005-2392, a billet cooler bypass block that replaces the factory thermostatic bypass, OE part 68186711AA. On these trucks a failed bypass is one of the most common reasons a cooler that looks fine stops doing its job, so for many overheating trucks this is the part that actually needs replacing.
The factory valve sits in the cooler circuit and routes returning fluid around the cooler while the transmission is cold, so it reaches operating temperature faster. When the fluid is hot the valve is meant to open fully and send everything through the cooler. GEARS Magazine explains that if the valve sticks, the cooler is effectively bypassed and the transmission overheats, and a cooler flush machine cannot clean the cooler through it. The ATS block has no thermal valve; all cooler flow is forced through the cooler at every temperature. On the 2013-2018 trucks the bypass sits under the truck on the passenger side, near where the transmission housing meets the engine block. That makes it a driveway job, unlike the 2008 6.7L truck GEARS covers, where the valve is part of the cooler and reaching it means pulling the grille, intercooler and condenser.
Follow the order GEARS uses: check for pinched or plugged cooler lines, a plugged cooler and engine cooling problems, including viscous fan operation. Then measure cooler flow; it should be at least one gallon per minute. GEARS also notes that 200 degrees F is the ideal ceiling, and every 20 degrees beyond it roughly halves transmission life. If everything else passes and flow is low, the bypass is the answer. For broader diagnosis on these trucks see our 68RFE Ram 3500 Cummins common problems guide, and if the pump is suspected, our 68RFE pump failure article.
Made for 2013-2018 Ram 2500 and 3500 trucks with the 6.7L Cummins and either the 68RFE or the Aisin AS69RC; the listing also names 4500 trucks of the same years. It replaces OE 68186711AA. Some retailers list the range as 2013-2019, so verify your bypass rather than relying on the year alone: the 2019-up heavy duty trucks changed the cooler bypass hardware, and 2010-2012 trucks use a different design. Match the OE number on your part or send us your year and VIN. See our full 68RFE parts collection.
Doing the coupler means the pan is coming off, so it is a good time for fresh filters. If the fluid shows heat damage or clutch material, consider a 68RFE overhaul kit or a 68RFE solenoid kit while you are in there.
| Fits | 68RFE 2013-2018 |
| Part type | Transmission Cooler |
| Condition | New |
| 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.
No. It is the cooler bypass block that replaces the factory thermostatic bypass, OE 68186711AA. Your existing cooler stays in place.
Yes. ATS builds it for 2013-up Ram 6.7L Cummins trucks with either the 68RFE or the Aisin AS69RC, using the same bypass location.
No. Earlier 68RFE trucks use a different bypass design. On the 2008 6.7L truck GEARS describes, the valve is part of the cooler assembly at the front of the truck.
It is a filter coupler for the in-pan spin-on filter that replaces the factory plastic coupler. It installs with a 1/2 inch hex and lets the filter be tightened correctly.
Use ATF+4. After install, top off and check the level with the fluid at 160 degrees F or more.
