ATS Thermal Bypass Valve O-ring Kit (Includes 4 O-Rings)

ATS Thermal Bypass Valve O-Ring Kit for Ram HD 6.7L Cummins The ATS Thermal Bypass Valve O-Ring Kit is a 4-piece replacement seal set designed to restore leak-free performance on your transmission fluid cooler lines. Over time, heat cycles, maintenance, or overtightening threaded fittings can cause factory or aftermarket O-rings to degrade, leading to automatic transmission fluid (ATF) leaks. This kit gives you the essential replacement seals needed to maintain proper fluid pressure and prevent costly transmission fluid loss on Dodge, Ram, and FCA vehicles. Quick Product Highlights Includes a full set of 4 high-quality replacement O-rings Stops and prevents transmission fluid leaks at the bypass valve and threaded fittings Direct fit for 2010 to 2024 Ram 2500, 3500, 4500, and 5500 6.7L Cummins trucks Compatible with 68RFE and Aisin AS69RC automatic transmissions Directly fits the ATS 2010-2012 Thermal Bypass Valve Upgrades, 2013-2018 Thermal Bypass Valve Upgrades, and 2019-2024 Thermal Bypass Valve Upgrades Works with most aftermarket bypass valve kits and FCA threaded cooler junctions Great to keep in the toolbox as spare maintenance parts during service Vehicle and Transmission Fitment This O-ring replacement kit is engineered for Dodge and Ram HD trucks equipped with the 6.7L Cummins diesel engine, including 2500, 3500, 4500, and 5500 models from 2010 through 2024. It provides an exact fit for lines connected to 68RFE and Aisin AS69RC automatic transmissions. Additionally, these O-rings fit various Chrysler, Dodge, Jeep, Fiat, Alfa Romeo, and Maserati vehicles that utilize threaded cooler line fittings. When to Replace Your Cooler Line O-Rings If you observe automatic transmission fluid pooling or seeping near your thermal bypass valve or cooler line connections, a compromised O-ring is often the root cause. Disassembling lines during routine maintenance or installing upgrade kits can distort old seals. Whether servicing an existing unit or stocking up on spares for your ATS 2010-2012 Thermal Bypass Valve Upgrades, 2013-2018 Thermal Bypass Valve Upgrades, or 2019-2024 Thermal Bypass Valve Upgrades, replacing them with fresh O-rings ensures a tight, reliable seal every time.