Mishimoto Transmission Cooler 10-12 Ram 6.7L Cummins

If you’re towing heavy, daily driving in hot conditions, or just want to keep your 68RFE running cooler and happier, the Mishimoto transmission cooler is a solid upgrade for your 2010–2012 Ram.

It’s a direct-fit replacement that ditches the factory weak link for something built to handle the kind of abuse a Cummins is known for dishing out. This cooler uses a tried-and-true tube-and-fin design, which makes it perfect for heavy towing and rapid load changes, exactly the kind of scenario where stock parts fall short. With a 60% increase in core volume and an 86% bump in external fin area compared to the OEM unit, you’ll see noticeably better cooling performance and heat dissipation. That translates to more stable transmission temps, even when you’re working your truck hard.

One of the smartest features? It can pair up with Mishimoto’s optional transmission line kit to bypass the factory cooler and A/C condenser. That’s huge if your transmission has ever failed and you’re worried about leftover contaminants taking out your rebuild. This kit makes sure your fluid runs clean and cool, whether you're using the stock or Mishimoto cooler setup.

Built for a clean install, engineered to keep temps under control, and designed with towing in mind, the Mishimoto cooler is the peace of mind your Ram deserves.