Remanufactured from Weller, the Allison HD4560 transmission delivers smooth shifting, dependable power transfer, and proven durability for heavy-duty trucks and vocational vehicles. Built to OEM Allison standards, this model features multiple forward speeds, advanced electronic controls, and a rugged design engineered for reliable performance under demanding conditions. With Weller’s precision remanufacturing process, the HD4560 helps fleets reduce downtime, extend service life, and maintain consistent productivity mile after mile.