Remanufactured from Weller, the Rockwell MO15Z12AA15 transmission with internal pump delivers 12 forward speeds, dependable power transfer, and smooth shifting for heavy duty trucking applications. Built to OEM standards, the integrated internal pump provides consistent lubrication and cooling to extend service life and maintain optimal performance under demanding conditions. With Weller’s rigorous remanufacturing process, the MO15Z12AA15 helps fleets reduce downtime, lower maintenance costs, and operate efficiently mile after mile.