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The Guardian series 68RFE transmission delivers unbeatable reliability for your 6.7L Cummins. Designed to eliminate common 68RFE failures, it features billet components, upgraded clutches, and SunCoast-exclusive internal modifications for extreme durability under towing and performance applications.
Upgrade your diesel truck with a complete transmission package that includes a built SunCoast transmission, billet torque converter, flexplate, and all necessary hardware. Built for serious towing, street, and competition trucks pushing extra torque and horsepower.
Perfect for DIYers and performance shops alike, SunCoast's rebuild kits deliver the highest quality clutches, seals, gaskets, and internal upgrades. These kits are engineered to outperform factory specs and prevent common transmission issues in 6.7L Cummins trucks.
Take your rebuild to the next level. These complete kits include a SunCoast billet multi-disc torque converter, ensuring better power transfer, heat resistance, and overall transmission longevity for towing and high-power applications.
Thoroughbred Diesel is your one-stop shop for SunCoast Diesel transmissions, rebuild kits, torque converters, and upgrades. Our diesel experts can help you choose the right setup for your truck — whether it's a workhorse towing setup or a high-performance build. Contact us today or order online for fast shipping and expert support!
At Thoroughbred Diesel, we proudly offer the complete range of SunCoast Diesel transmissions, rebuild kits, and performance upgrades for Dodge Cummins, Ford Powerstroke, and GM Duramax trucks. MADE IN THE USA with proprietary engineering and rigorous testing, SunCoast proudly offers SunCoast Diesel Transmissions, SunCoast Transmission w/ Torque Converter Packages, and Guardian Torque Converters which are known for maximum durability, enhanced driveline strength, and unmatched reliability under extreme conditions. Whether you’re towing, off-roading, or pushing over 1,000 horsepower, SunCoast delivers custom-built solutions tailored to your truck’s unique demands. Upgrade your diesel truck’s performance with SunCoast Diesel—the trusted name for strength, longevity, and performance. We offer free expert advice, so call us at 859-737-4966 if you have any questions.