6-Speed Manual Transmission

The Zumbrota Drivetrain S6-S650F is a remanufactured 6-speed manual transmission specifically engineered for Ford F-Series Super Duty trucks, aiming to provide a like-new performance without the cost of a brand-new unit. This transmission undergoes a comprehensive three-step inspection and remanufacturing process. It begins with a thorough pre-inspection to identify any case cracks, excessive wear, or common OEM-related issues. Following this, every internal component is meticulously measured against OEM specifications to ensure precision. After reassembly, a final inspection verifies that all parts meet Zumbrota's strict standards, including checks for gear wear, mainshaft straightness, and synchronizer function. To guarantee performance and durability, every S6-S650F transmission is dyno-tested under various simulated real-world conditions. Zumbrota also employs a proprietary cleaning method involving hydro-blast rinsing and sandblasting for both internal and external parts, ensuring exceptional cleanliness. The transmission is designed to withstand the rigors of 4WD operation and heavy hauling. This transmission is compatible with Ford F-250, F-350, F-450, and F-550 Super Duty models equipped with either the 5.4L or 6.8L engine, specifically for the years 2003 through 2007 for F-250/F-350, and 2003 for F-450/F-550 4x4. It features a 5:79 Low - 0:72 gear ratio, a 34 spline rear output, and a 6-bolt shifter stub. A two-year unlimited mileage warranty is included for peace of mind.