There's no greater enemy for a transmission than heat. Whether your 2015-2018 RAM 6.7L Cummins is a dedicated tow vehicle, hardworking fleet truck, or a daily driver with a liking for the dragstrip, you need to ensure that your transmission runs cool. Luckily, Mishimoto has developed a direct-fit transmission cooler to do just that. Our 2015-2018 RAM 6.7L Cummins transmission cooler utilizes a tube-and-fin core with internal fins to balance flow with efficient cooling. With a massive 112-percent greater core volume, 237-percent increase in fin area, and 226-percent increase in fluid capacity, this trans cooler is a huge improvement over the stock unit. All these improvements make the Mishimoto transmission cooler the ideal replacement for your stock transmission cooler.Installation of the Mishimoto 2015-2018 RAM 6.7L Cummins transmission cooler requires no cutting or other modifications and includes all hardware needed for a fast and easy install.
Features
- 237-percent increase in external fin area over stock cooler
- 226-percent increase in fluid capacity over stock cooler
- 112-percent increase in core volume over stock cooler
Mishimoto 15-18 Dodge RAM 6.7L Cummins Transmission Cooler
Vehicle fitment
Estimated fitment — verify before purchase| Years | Make | Model |
|---|---|---|
| 2015–2018 | Ram | 2500 |
| 2015–2018 | Ram | 3500 |
- Engine: 6.7L Cummins
Specifications
Manufacturer data for this part — all visible, no tabs to dig through.
| Brand | Mishimoto |
| Part number | MISMMTC-RAM-15SL |
| Category | Cooling |

Worth adding
Useful in any truck — ships separately in its own box.
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