BD Diesel 1064914SS Roadmaster Transmission Converter Package - 66RFE 4WD

The BD Diesel 1064914SS Roadmaster 66RFE Transmission and Converter Package is a fully remanufactured, heavy-duty automatic transmission assembly engineered for Ram 2500/3500 trucks equipped with 5.7L or 6.4L HEMI engines in 4WD configurations. Designed for demanding towing, hauling, and high-horsepower applications, this package delivers significantly improved durability, shift quality, and long-term reliability over the stock 66RFE unit.

The factory 66RFE transmission is known for several chronic failure points, including valve body cross-leaks, a worn SSV bore, and Overdrive (OD) clutch failure. The BD Roadmaster package directly addresses these weaknesses with a suite of internal upgrades that eliminate the root causes of these common failures.

Key Features:

• Upgraded Valve Body — Features a billet steel-sleeved SSV bore for leak-free, reliable valve operation
• Gasketed Separator Plate — Prevents cross-leaks that rob OD clutch pressure, eliminating a leading cause of clutch failure
• Billet Internal Components — Higher-strength hard parts designed to resist failure under sustained load and high torque
• Upgraded Friction Materials — Improved clutch capacity and durability for repeated heat cycles and demanding use
• Matched Torque Converter Included — Engineered to work in conjunction with the transmission for optimal power transfer, efficiency, and durability
• Calibrated Valve Body Circuits — Improved shift timing and transmission response for smooth, consistent gear changes
• Increased Heat Capacity — Enhanced thermal management to control operating temperature during towing and performance use
• 4WD Application — Specifically built for 4-wheel drive drivetrain configurations

BD Diesel transmissions are not simply rebuilt stock units — each assembly is remanufactured with purposeful upgrades to withstand heavier tow loads, higher horsepower, and the rigors of real-world heavy-duty use. The Roadmaster series is rated to handle 400–600 HP depending on application, making it suitable for stock trucks as well as mildly modified builds. A core charge applies at time of purchase.