Remanufactured from Weller, the Detroit DT12OB1CS transmission combines overdrive performance with cooler-ready capability and single clutch efficiency for heavy duty trucking applications. Built to OEM Detroit standards, this model offers 12 forward speeds, automated shifting, and a design engineered for long-term reliability. With smoother gear changes, improved temperature control, and reduced maintenance needs, the DT12OB1CS helps fleets minimize downtime and maximize productivity mile after mile.