Allison Transmission Holdings, Inc., together with its subsidiaries, designs, manufactures, and sells fully automatic transmissions for medium- and heavy-duty commercial vehicles and medium- and heavy-tactical U.S. defense vehicles, and electrified propulsion systems worldwide. The company offers transmissions for various applications, including distribution, refuse, construction, fire, and emergency on-highway trucks; school and transit buses; motor homes; energy, mining, and construction off-highway vehicles and equipment; and wheeled and tracked defense vehicles. It provides its transmissions and electric propulsion solutions under the Allison Transmission brand name; and remanufactured transmissions under the ReTran brand name.