5.9L Cummins Common Rail Transmission Oil Cooler 2003-2009

Overview

This is an automatic transmission oil cooler / cooler line service part for the Ram, Dodge 5.9L Cummins Common Rail diesel (2003-2009). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade 5.9L Cummins Common Rail repair or service. Every order ships fast and is backed by our support team.

What It Does & How It Helps

The transmission oil cooler sheds heat from the automatic transmission fluid, either through a heat exchanger in the radiator end tank or a separate air-to-oil cooler ahead of it. Heat is what kills an automatic: towing and heavy loads break the fluid down, and once it is degraded the clutches glaze and the converter follows. A cooler that is plugged, leaking, or holding debris after a transmission or converter failure has to be replaced or properly flushed before a rebuilt unit goes in, or the new transmission inherits the same contamination.

What's Included

• the transmission oil cooler and/or its lines, fittings and O-rings as specified

Fitment

Fits Ram, Dodge trucks equipped with the 5.9L Cummins Common Rail diesel engine, 2003-2009. Please confirm your engine and year before ordering to ensure correct fitment.

Common Symptoms & When to Use

Consider this 5.9L Cummins Common Rail part when you experience:

• high transmission fluid temperature, especially while towing
• a transmission fluid leak at the cooler or its lines
• cooler contamination after a transmission or converter failure
• a transmission cooler or cooler line replacement

Specifications

• Engine: 5.9L Cummins Common Rail
• Year Range: 2003-2009

Quality & Service

Fast shipping on in-stock orders. Free shipping on orders over $70. Backed by Core Diesel Parts — your source for 5.9L Cummins Common Rail diesel parts.