Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
For Your Every Summer RSVP, with Code: SUMMER15
Description
Mishimoto 03-09 Dodge Ram 5.9L/6.7L Cummins Transmission CoolerThere's no greater enemy for a transmission than heat. Whether your 2003 2009 Dodge Ram 5. 9L 6. 7L Cummins is a dedicated tow vehicle, hardworking fleet truck, or a daily driver, you need to ensure that your transmission runs cool. Luckily, Mishimoto has developed a direct fit transmission cooler to do just that. Our 2003 2009 Dodge Ram 5. 9L 6. 7L Cummins transmission cooler utilizes a stacked plate core for durable and powerful cooling. With a
There's no greater enemy for a transmission than heat. Whether your 2003-2009 Dodge Ram 5.9L / 6.7L Cummins is a dedicated tow vehicle, hardworking fleet truck, or a daily driver, you need to ensure that your transmission runs cool. Luckily, Mishimoto has developed a direct-fit transmission cooler to do just that. Our 2003-2009 Dodge Ram 5.9L / 6.7L Cummins transmission cooler utilizes a stacked plate core for durable and powerful cooling. With a massive 212% greater core volume, 244% increase in fluid capacity, this trans cooler is a huge improvement over stock 2003-2009 Dodge Ram 5.9L / 6.7L Cummins transmission cooler. The Mishimoto transmission cooler is not only larger than the stock cooler, but more reliable too. When the stock cooler's thermostat fails, it fails closed, bypassing the cooler and returning hot fluid to the transmission. Mishimoto has solved this common issue by making the thermostat in our 2003-2009 Dodge Ram Cummins transmission cooler fully serviceable and easily bypassed for constant cooling. A port located at the top of the cooler provides easy access to the thermostat for servicing in just a few minutes. Replacement thermostats can be purchased individually if needed; no more replacing the entire cooler if the thermostat fails. Owners in cold climates can still enjoy the fast warm-up times that the thermostat provides, while owners in hot climates can choose to bypass the thermostat by replacing it with the supplied stainless-steel bypass plug. To make this cooler even easier to install and service, Mishimoto saves you the hassle of removing seized fittings. The provided CNC-machined, stainless steel hose barb fittings let you cut to the chase, literally. These fittings and the supplied transmission cooler hose allow you to remove the quick-disconnect fittings and connect the stock soft-line to the Mishimoto cooler. Like all Mishimoto products, this transmission cooler is backed up by our Lifetime WarrantyShipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
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Product Reviews
★★★★★ 5
Easy to deal with
Great service!
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Reviewed in the United States on March 25, 2026
★★★★★ 5
Great service
Fast service and all it took was a phone call. Highly recommended
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Reviewed in the United States on June 4, 2026
★★★★★ 1
Not worth purchasing.
Not worth purchasing. Nothing breaks until the insurance is expired.
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Asurion warranty covered my office chair as promised
I was able to use the furniture protection plan on my office chair. Process was smooth and was mailed out a check so we could purchase a new chair.
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Reviewed in the United States on March 12, 2026
★★★★★ 5
Get the INSURANCE!!!!
My chair broke. Almost at the one year mark… I’m so glad I got the insurance! I put in my claim (it was easy) and it was resolved within 72 hours. Sometimes I decline the insurance because it turns out to be more hassle than it’s worth but Asurion came through!
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Reviewed in the United States on December 14, 2025