Mishimoto misMMTC-RAM-15SL 15-18 Dodge RAM 6.7L Cummins Transmission Cooler

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. To make even better use of that extra core volume, the Mishimoto transmission cooler utilizes fins within the tubes to not only add more cooling surface area, but also ensure more of the fluid contacts the tube, leading to better cooling efficiency. 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. Like all Mishimoto products, this transmission cooler is backed up by our Lifetime Warranty with Accident Protection for worry free cooling as long as you own it. Automatic transmission oil cooler designed to regulate fluid temperature and prevent overheating. Enhances transmission longevity, maintains performance, and features durable construction with a precise fit.

• 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

The Mishimoto misMMTC-RAM-15SL transmission cooler is a direct-fit replacement designed for 2015-2018 RAM 6.7L Cummins applications. Its tube-and-fin core uses internal fins to balance fluid flow with efficient cooling, helping regulate automatic transmission fluid temperature, prevent overheating, maintain performance, and support transmission longevity.

Compared with the stock cooler, this Mishimoto unit provides a 112-percent increase in core volume, a 237-percent increase in external fin area, and a 226-percent increase in fluid capacity. Internal tube fins add cooling surface area and help more transmission fluid contact the tube walls for improved cooling efficiency.

Installation requires no cutting or other modifications. The cooler includes all hardware needed for installation and is backed by Mishimoto's Lifetime Warranty with Accident Protection. Fitment data identifies 2015 Ram 2500 and 2015 Ram 3500 applications; verify the vehicle application before ordering.

Key Features & Performance Benefits

• Direct-fit design: Replaces the stock transmission cooler without cutting or other modifications.
• Efficient tube-and-fin core: Internal fins balance fluid flow with cooling performance.
• Increased cooling capacity: Provides greater core volume, fin area, and fluid capacity than the stock cooler.
• Transmission protection: Helps regulate fluid temperature and prevent overheating during towing, fleet use, daily driving, or dragstrip use.

Key Product Specifications & Technical Data

• Brand: Mishimoto
• Part number: misMMTC-RAM-15SL
• Product type: Automatic transmission oil cooler
• Core design: Tube-and-fin
• Core volume increase: 112 percent over stock cooler
• External fin area increase: 237 percent over stock cooler
• Fluid capacity increase: 226 percent over stock cooler
• Warranty: Lifetime Warranty with Accident Protection

What's Included

Transmission cooler and all hardware needed for installation.

Fitment

2015-2018 RAM 6.7L Cummins applications. Listed fitment includes 2015 Ram 2500 and 2015 Ram 3500.

Fitments:
2015 Ram 2500 Big Horn
2015 Ram 2500 Laramie
2015 Ram 2500 Laramie Limited
2015 Ram 2500 Laramie Longhorn
2015 Ram 2500 Lone Star
2015 Ram 2500 Outdoorsman
2015 Ram 2500 Power Wagon
2015 Ram 2500 SLT
2015 Ram 2500 Tradesman
2015 Ram 3500 Big Horn
2015 Ram 3500 Laramie
2015 Ram 3500 Laramie Limited
2015 Ram 3500 Laramie Longhorn
2015 Ram 3500 Lone Star
2015 Ram 3500 SLT
2015 Ram 3500 Tradesman
2016 Ram 2500 Big Horn
2016 Ram 2500 Laramie
2016 Ram 2500 Laramie Longhorn
2016 Ram 2500 Limited
2016 Ram 2500 Outdoorsman
2016 Ram 2500 Power Wagon
2016 Ram 2500 SLT
2016 Ram 2500 Tradesman
2016 Ram 3500 Big Horn
2016 Ram 3500 Laramie
2016 Ram 3500 Laramie Longhorn
2016 Ram 3500 Limited
2016 Ram 3500 SLT
2016 Ram 3500 Tradesman
2017 Ram 2500 Big Horn
2017 Ram 2500 Laramie
2017 Ram 2500 Laramie Longhorn
2017 Ram 2500 Limited
2017 Ram 2500 Power Wagon
2017 Ram 2500 SLT
2017 Ram 2500 Tradesman
2017 Ram 3500 Big Horn
2017 Ram 3500 Laramie
2017 Ram 3500 Laramie Longhorn
2017 Ram 3500 Limited
2017 Ram 3500 Lone Star
2017 Ram 3500 SLT
2017 Ram 3500 Tradesman
2018 Ram 2500 Big Horn
2018 Ram 2500 Laramie
2018 Ram 2500 Laramie Longhorn
2018 Ram 2500 Limited
2018 Ram 2500 Power Wagon
2018 Ram 2500 SLT
2018 Ram 2500 Tradesman
2018 Ram 3500 Big Horn
2018 Ram 3500 Laramie
2018 Ram 3500 Laramie Longhorn
2018 Ram 3500 Limited
2018 Ram 3500 SLT
2018 Ram 3500 Tradesman

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1