The Gen 2 Eaton AutoShift Transmission Control Unit (TCU) is a factory-new OEM component designed to manage automated shifting in heavy-duty transmissions. It precisely controls gear selection, clutch engagement, and shift timing by communicating with engine and transmission sensors, ensuring smooth and efficient operation. Built to meet Eaton’s exacting standards, this TCU enhances drivability, fuel efficiency, and overall vehicle performance, making it a critical component for fleets that demand reliability and consistency. When you purchase a new OEM Gen 2 AutoShift TCU from Weller Truck Parts, you get more than just a high-quality product, you get peace of mind. Every unit is backed by Weller’s industry-leading warranty and supported by a team of experienced tech support professionals and responsive customer service. Whether you're replacing a failed module or upgrading your fleet, Weller ensures you have the right part and the expert help you need to keep your trucks running smoothly.