Remanufactured from Weller, the Allison B400R transmission delivers smooth shifting, reliable power transfer, and long-lasting durability for transit buses and other heavy-duty applications. Built to OEM Allison standards, this model features multiple forward speeds, advanced electronic controls, and a robust design engineered to handle demanding stop-and-go conditions. With Weller’s precision remanufacturing process, the B400R helps fleets minimize downtime, reduce maintenance costs, and maintain dependable performance mile after mile.