Remanufactured from Weller, the Detroit DT12DA3CS transmission delivers direct-drive efficiency with cooler-ready capability and single clutch reliability for heavy duty trucking applications. Built to OEM Detroit standards, this model features 12 forward speeds, automated shifting, and a durable design engineered for long-term performance. With enhanced cooling provisions, smoother gear changes, and reduced maintenance needs, the DT12DA3CS helps fleets minimize downtime, improve fuel efficiency, and maintain dependable operation mile after mile.