Allison Transmission Holdings, Inc. is a global leader in the design, manufacturing, and sale of automatic transmissions for medium- and heavy-duty commercial vehicles, as well as for heavy-tactical U.S. defense instruments. The company specializes in providing transmissions for an array of applications, including fire, construction, distribution, emergency on-highway trucks, and off-highway vehicles and equipment in the energy, construction, and mining sectors. Its electric propulsion solutions are provided under the Allison Transmission brand name, while remanufactured transmissions carry the ReTran name. The firm also offers branded replacement parts, engineering services, defense kits, and more to original equipment manufacturers, distributors, and the U.S. government. Allison Transmission Holdings, Inc. serves its customers through an independent network of approximately 1,600 distributor and dealer locations. The company, founded in 1915, is based in Indianapolis, Indiana, and was formerly known as Clutch Holdings, Inc.