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Allison Transmission Schedules First Quarter 2012 Results Conference Call for April 23

Allison Transmission

INDIANAPOLIS, April 13, 2012 /PRNewswire via COMTEX/ -- Allison Transmission Holdings Inc. (NYSE: ALSN), the premier global provider of commercial duty fully-automatic transmissions and hybrid-propulsion systems, will hold its first quarter 2012 results conference call at 4:30 p.m. Eastern Time on Monday, April 23. Lawrence E. Dewey, Chairman and Chief Executive Officer, and David S. Graziosi, Chief Financial Officer, will review the company's financial performance for the period.

The dial-in for the conference call is 1-877-941-1427 and the international dial-in number is 1-480-629-9664. Live passcode is 4532173. A live webcast of the conference call will also be available on the investor relations page of the Company's website at http://ir.allisontransmission.com/. The press release announcing Allison Transmission's first quarter 2012 Results will also be available on the website under "Financial News Releases".

For those unable to participate in the conference call, a replay will be available from 7:30 p.m. Eastern Time on April 23, 2012 until Noon Eastern Time on May 1, 2012. The replay dial-in number is 1-877-870-5176 and the international replay dial-in number is 1-858-384-5517. Replay passcode is 4532173.

About Allison Transmission

Allison Transmission (NYSE: ALSN) is the world’s largest manufacturer of fully automatic transmissions for medium- and heavy-duty commercial vehicles and is a leader in electric hybrid-propulsion systems for city buses. Allison transmissions are used in a variety of applications including refuse, construction, fire, distribution, bus, motorhomes, defense and energy. Founded in 1915, the company is headquartered in Indianapolis, Indiana, USA and employs approximately 2,900 people worldwide. With a market presence in more than 80 countries, Allison has regional headquarters in the Netherlands, China and Brazil with manufacturing facilities in the U.S., Hungary and India. Allison also has approximately 1,400 independent distributor and dealer locations worldwide. For more information, visit allisontransmission.com.