The Gen 2 Eaton AutoShift Transmission Control Unit (TCU) is responsible for managing gear selection and receiving inputs from transmission mounted sensors as well as the driver shift device. The TCU directly controls shifting by manipulating the XY shifter. Its durable design and proven performance make it a trusted solution for heavy-duty commercial vehicles. 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.