The Eaton Fuller Mainshaft, part number 239348, is a genuine OEM manual transmission component designed for Eaton Fuller heavy-duty transmissions. The mainshaft is a core internal component of the manual transmission assembly, carrying gear engagement loads through the drivetrain. Pro Gear and Transmission carries genuine Eaton Fuller transmission parts for fleet and shop buyers. Not sure this is your part? Give us a call to confirm proper fit for your application.Interchanges:235359HF239348FeaturesGenuine Eaton Fuller OEM mainshaftPart number 239348Designed for Eaton Fuller heavy-duty manual transmission assembliesClassified under manual transmission gear componentsSold individually as a single unit