What happens if my factory transmission cooler fails?

When the factory liquid-to-liquid transmission cooler fails, coolant can leak into your transmission fluid. This mixture can cause significant damage to your transmission, potentially leading to expensive rebuilds or replacements.

Does this Mishimoto cooler require any modifications to install?

No, this Mishimoto replacement transmission oil cooler is designed as a direct fit. It is made to OEM specifications and requires no modifications for installation, making it a straightforward swap.

What is included with this transmission cooler?

This transmission cooler comes with a new powdercoated bracket and brass fittings to help ensure an easy installation. It is built with durable, corrosion-resistant aluminum construction.

1 / 8

Specifications

Brand: Mishimoto
Part #: MMTC-RAM-03TQ
UPC: 840197710593

Mishimoto 03-07 Dodge Ram 5.9L Cummins Replacement Transmission Cooler

Name: Mishimoto 03-07 Dodge Ram 5.9L Cummins Replacement Transmission Cooler
Brand: Mishimoto
SKU: mishimoto-mishimoto-03-07-dodge-ram-5-9l-cummins-replacement-transmission-cooler-t14-521160
Price: 163.79 USD
Availability: InStock

$163.79

Only 5 left in stock

Fits 2003-2007 Dodge Ram 2500. Mishimoto replacement transmission cooler prevents coolant leaks into transmission fluid.

Key Features

Fits 2003-2007 Dodge Ram 2500, 2003-2007 Dodge Ram 3500, and 2003 Dodge Ram 1500.
Durable, corrosion-resistant aluminum construction.
Equivalent to OEM specifications for fit and function.
Includes a new powdercoated bracket and brass fittings for easier installation.
Helps prevent coolant from leaking into transmission fluid, avoiding costly damage.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

No-fit, no charge. Wrong part? Send it back, free return label.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

Mishimoto is known for making well-built cooling components, and this replacement transmission oil cooler for your 2003-2007 Dodge Ram 5.9L Cummins is no exception. The factory cooler uses engine coolant to manage transmission fluid temperature, which works well until it fails. When that happens, coolant can mix with your transmission fluid, leading to costly repairs. This Mishimoto cooler is designed as a direct, OEM-style replacement, meaning it fits right in without needing any modifications.

Built with durable, corrosion-resistant aluminum, this cooler is made to the same specifications as the original equipment part, ensuring it functions just like the factory unit. Replacing your old cooler with this one, especially if you're doing other maintenance on your Cummins, can help prevent premature transmission failure caused by coolant contamination. It even comes with a new powdercoated bracket and brass fittings to make installation straightforward.

By proactively swapping out your transmission cooler, you're taking a smart step to protect your transmission from potential damage. This cooler is backed by Mishimoto's signature Lifetime Warranty, giving you peace of mind.