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The Mishimoto 03-07 Dodge Ram 5.9L Cummins Replacement Transmission Cooler is a high-quality OEM replacement designed to restore and maintain the optimal operation of your truck’s transmission cooling system. This liquid-to-liquid cooler utilizes the vehicle’s existing cooling system to regulate transmission fluid temperatures, ensuring reliable performance in both warm and cold weather conditions. Over time, factory transmission coolers can wear out or develop leaks, risking coolant mixing with transmission fluid, which can lead to severe transmission damage and costly repairs. Replacing your cooler proactively with the Mishimoto unit helps prevent such failures, extending the lifespan of your transmission and maintaining vehicle reliability.
Constructed from durable, corrosion-resistant aluminum, this cooler offers excellent heat dissipation and longevity. Included with the cooler are a powder-coated bracket and brass fittings, making installation straightforward without the need for modifications. Designed to meet OEM specifications, the Mishimoto cooler guarantees a proper fit and function, matching the original part's performance standards. Its robust construction ensures resistance to corrosion and environmental wear, making it suitable for demanding driving conditions. As with all Mishimoto products, this transmission cooler is backed by a lifetime warranty, providing peace of mind and confidence in its durability and performance.
This replacement cooler is compatible with a range of Dodge Ram models from 2003 to 2007, including 1500, 2500, and 3500 series trucks equipped with the 5.9L Cummins engine. Proper cooling system maintenance is crucial for vehicle longevity and performance, and the Mishimoto Transmission Cooler offers a reliable, cost-effective upgrade. By maintaining optimal transmission temperatures, this cooler helps prevent overheating, reduces wear, and ensures smooth shifting under heavy loads or challenging driving conditions. Designed with OEM specifications and quality materials, this cooler is an essential component for Ram owners seeking to preserve their truck’s transmission health and avoid costly repairs in the future.
Features:
Fitment:
2003 Dodge Ram 1500 Laramie
2003 Dodge Ram 1500 SLT
2003 Dodge Ram 1500 ST
2003 Dodge Ram 2500 Laramie
2003 Dodge Ram 2500 SLT
2003 Dodge Ram 2500 ST
2003 Dodge Ram 3500 Laramie
2003 Dodge Ram 3500 SLT
2003 Dodge Ram 3500 ST
2004 Dodge Ram 2500 SLT
2004 Dodge Ram 2500 ST
2004 Dodge Ram 3500 Laramie
2004 Dodge Ram 3500 SLT
2004 Dodge Ram 3500 ST
2005 Dodge Ram 2500 Laramie
2005 Dodge Ram 2500 SLT
2005 Dodge Ram 2500 ST
2005 Dodge Ram 3500 Laramie
2005 Dodge Ram 3500 SLT
2005 Dodge Ram 3500 ST
2006 Dodge Ram 2500 Laramie
2006 Dodge Ram 2500 SLT
2006 Dodge Ram 2500 Sport
2006 Dodge Ram 2500 ST
2006 Dodge Ram 2500 TRX4
2006 Dodge Ram 3500 Laramie
2006 Dodge Ram 3500 SLT
2006 Dodge Ram 3500 Sport
2006 Dodge Ram 3500 ST
2007 Dodge Ram 2500 Laramie
2007 Dodge Ram 2500 SLT
2007 Dodge Ram 2500 Sport
2007 Dodge Ram 2500 ST
2007 Dodge Ram 2500 TRX4
2007 Dodge Ram 3500 Laramie
2007 Dodge Ram 3500 SLT
2007 Dodge Ram 3500 Sport
2007 Dodge Ram 3500 ST
2007 Dodge Ram 3500 TRX4
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
