Remanufactured from Weller, the Detroit DT12OA3CS transmission provides overdrive performance with cooler-ready capability and single clutch efficiency for demanding heavy duty trucking applications. Built to OEM Detroit standards, this model features 12 forward speeds, automated shifting technology, and a design focused on reliability and long-term durability. With enhanced cooling options, smoother gear changes, and reduced driver fatigue, the DT12OA3CS helps fleets lower maintenance costs, minimize downtime, and maintain consistent productivity mile after mile.