Atlantic Detroit Diesel-Allison

Atlantic Detroit Diesel-Allison (ADDA), a Kirby Corporation subsidiary through Stewart & Stevenson, is an authorized, value-added distributor and service provider for premium diesel and alternative-fuel engines, transmissions, and related systems and components. It serves on-highway vehicle markets and off-highway applications including commercial marine, power generation, construction, and industrial equipment, offering factory-authorized parts and expert service. Its predecessors began operating in 1955.