Mishimoto MMTC-RAM-03TQ Trans Cooler for 2003-2007 Dodge Ram 5.9L Cummins

Vehicle Fitment

• 2003-2007 Dodge Ram 2500/3500 (5.9L Cummins Diesel, automatic)

Features

• Direct-fit replacement transmission oil cooler for 5.9L Cummins Ram trucks
• Stacked-plate core designed for durability and efficient cooling
• Durable aluminum construction resists corrosion and wear
• Includes powder-coated bracket and brass fittings for easy install
• Uses all factory transmission lines and hardware - no modifications needed
• Equivalent OEM-spec design ensures reliable performance
• Helps prevent heat-related transmission wear and failure
• Backed by Mishimoto Lifetime Warranty

Specifications

• Part Number: MMTC-RAM-03TQ
• Core Construction: Stacked-plate aluminum
• Rows: 23
• Core Height: ~3.66"
• Core Length: ~7.6"
• Core Thickness: ~2.87"
• Overall Height: ~6.34"
• Overall Length: ~18.87"
• Overall Width: ~5.79"
• Fitting Size: 3/4-16

Included Components

• 1x Replacement transmission oil cooler
• 1x Powder-coated mounting bracket
• 2x Brass-fitting adapters
• Installation hardware
• Mishimoto Lifetime Warranty documentation

Product Description

The Mishimoto MMTC-RAM-03TQ Replacement Transmission Oil Cooler is engineered as a direct-fit OEM replacement for 2003-2007 Dodge Ram 2500/3500 trucks powered by the 5.9 L Cummins diesel. Built with a stacked-plate aluminum core, this cooler provides durable, efficient heat dissipation for automatic transmission fluid, helping prevent overheating and premature wear under heavy towing and daily driving loads. Its corrosion-resistant construction and fluid-handling design match OEM specifications for fit and function, making it a reliable upgrade that installs without modifications using factory lines and hardware.

Included with the cooler are a powder-coated mounting bracket and brass fittings for hassle-free installation. With a robust design backed by Mishimoto's Lifetime Warranty, the MMTC-RAM-03TQ helps maintain cooler transmission temperatures across demanding conditions - whether hauling weighty cargo or cruising in stop-and-go traffic.