Transmission Cooler Hose Line Set for Dodge Ram 2500 3500 5.9L 48RE 2003-2007

Transmission Cooler Hose Line Set for Dodge Ram 2500 3500 5.9L 48RE 2003-2007

Application: 2003-2007 Dodge Ram 2500 3500 | 5.9L Cummins Diesel | 48RE Automatic Transmission

Condition: New, Aftermarket | Premium OE-Equivalent Quality

Engineering Overview

Engineered for heavy-duty cooling performance, this transmission cooler hose line set delivers reliable thermal management for Dodge Ram 2500/3500 models equipped with the 5.9L Cummins engine and 48RE four-speed automatic transmission. Designed to withstand the extreme pressures and temperatures inherent in heavy-duty towing and hauling applications.

Key Features

• Precision OEM Fitment: Direct-fit replacement eliminates modification and ensures proper routing, clearance, and connection points
• Leak-Free Construction: Factory-style crimped fittings and reinforced hose construction prevent fluid loss and maintain system pressure
• Thermal Performance: Optimized internal diameter promotes efficient fluid circulation, reducing transmission operating temperatures by up to 20°F under load
• Durability Tested: Resistant to heat, vibration, abrasion, and chemical degradation from ATF+4 transmission fluid
• Complete Line Set: Includes both supply and return lines for comprehensive cooler circuit replacement

Why Replace Your Transmission Cooler Lines?

Transmission cooler lines are a critical maintenance component on 2003-2007 Ram HD trucks. Over time, exposure to road salt, heat cycling, and underbody debris can cause corrosion, cracking, and eventual failure. A compromised cooler line can lead to catastrophic fluid loss, overheating, and transmission damage—often without warning.

Proactive replacement during routine maintenance intervals protects your investment and ensures consistent thermal management, especially for trucks operating under demanding conditions such as trailer towing, heavy payload hauling, or extended highway use.

Installation Notes

Professional installation recommended. Ensure proper torque specifications on fittings to prevent leaks. Inspect cooler and radiator connections for corrosion or damage before installation. Refill transmission with manufacturer-specified ATF+4 fluid and verify proper fluid level after test drive.

Specifications

• Part Type: Transmission Cooler Hose Line Set (Supply + Return)
• Material: Reinforced rubber hose with steel braided core and crimped steel fittings
• Compatibility: 48RE transmission (2003-2007 Ram 2500/3500 5.9L Cummins)
• Warranty: Backed by Fab Heavy Parts quality assurance

Essential maintenance component for preserving transmission longevity and performance in heavy-duty Dodge Ram trucks.