This service bulletin focuses on checking the harness connections for both Eaton AutoShift™ and UltraShift™ transmissions with a model number of 26-46. The bulletin covers a wide range of Freightliner trucks, including the flagship models like the COE (Cab Over Engine) variants of FLA, FLB, Argosy, and the conventional models such as FLD, Business Class, FLC 112, Century Class, and Cargo. Specific models included in the bulletin are Columbia, Coronado, Business Class M2, and Cascadia. The content of this service bulletin provides detailed instructions and guidance on meticulously inspecting the harness connections associated with these Eaton transmissions, ensuring proper and reliable operation.

The Eaton AutoShift and Ultrashift sb2646 transmissions are robust, automated manual transmissions designed for heavy-duty trucks, renowned for their efficiency and durability. These transmissions are widely used in Freightliner trucks, specifically in models for long-haul and vocational applications. These transmissions find their place in a diverse range of Freightliner trucks, including the FLA and FLB COE models, the FLD Conventional, the Business Class, the FLC 112 Conventional, the Century Class Conventional, the Argosy COE, Cargo, Columbia, Coronado, Business Class M2, Cascadia, and various others. The Eaton sb2646 transmission is engineered for high torque output and smooth shifting, ensuring optimized performance and fuel economy. The AutoShift and Ultrashift variants offer different levels of automation. The AutoShift series provides basic automation, allowing the driver to select gears manually or let the transmission automatically shift, while the Ultrashift series boasts advanced automation, which automatically selects the optimal gear for every situation, maximizing efficiency and minimizing driver input. The sb2646 transmission is also equipped with various features like hill-start assist, engine braking, and electronic control systems that enhance its capabilities and driver comfort. Checking the harness connections on these transmissions is crucial for ensuring their proper operation and safety.