48RE Guardian HD Transmission with Converter

• Provides stronger shifts and longer wear life
• Reinforced for long-term reliability
• Complete sealing solution for leak-free performance
• Reduces friction and improves component longevity
• 2-Year Unlimited Mile Warranty

Built for Hard Work: The Ultimate 48RE Upgrade

When reliability and performance matter most, the SunCoast 48RE Guardian HD Transmission delivers. Designed specifically for heavy-duty towing, hauling, and commercial applications, this transmission provides unmatched durability and refined performance for your 2004.5-2007 Ram 5.9L Cummins. Unlike stock transmissions that struggle under extreme loads, the Guardian HD series is engineered to withstand the toughest conditions day in and day out. Whether you're hauling equipment, towing a trailer, or navigating challenging terrains, this transmission ensures smooth operation, minimal NVH (noise, vibration, and harshness), and long-term reliability. With SunCoast’s expert engineering, you get a transmission that works as hard as you do—without compromise.

Engineered for Strength & Longevity

SunCoast designed the 48RE Guardian HD Transmission with a focus on functionality, reliability, and strength. This transmission is fully upgraded to eliminate common failure points and enhance longevity. The SunCoast Billet Accumulator Piston, high-performance carbon fiber band, and billet band lever, strut, and anchor provide reinforced internal components for better shifting performance and reduced wear. The high-flow transmission filter and Mag-Hytec deep pan improve fluid cooling and filtration, preventing overheating and ensuring clean, efficient operation. This transmission is built for easy installation, making it a seamless upgrade for those who demand top-tier performance without unnecessary complexity.

High-Performance Billet Torque Converter

The included SunCoast Single-Disc Billet Torque Converter is a major upgrade over the stock unit, offering stronger lockup, reduced slip, and improved efficiency. This torque converter is designed to handle the high torque output of the 5.9L Cummins, delivering smoother engagement, better throttle response, and increased durability under heavy loads. Furnace-brazed fins and reinforced turbine splines ensure exceptional strength, while precision balancing minimizes vibrations for a refined, factory-like feel. Whether you're towing, hauling, or driving daily, this high-quality billet torque converter maximizes power transfer and extends the life of your transmission.

• $2,500 core charge applies.