News Release

Allison Transmission Schedules Second Quarter 2013 Results Conference Call for July 29

July 22, 2013 at 8:31 AM EDT

INDIANAPOLIS, July 22, 2013 /PRNewswire/ -- Allison Transmission Holdings Inc. (NYSE: ALSN), the largest global provider of commercial duty fully-automatic transmissions and hybrid-propulsion systems, will hold its second quarter 2013 results conference call at 4:30 p.m. EDT on Monday, July 29. Chairman, President and Chief Executive Officer Lawrence E. Dewey, and Executive Vice President and Chief Financial Officer David S. Graziosi will review the company's financial performance for the period.

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The dial-in phone number for the conference call is 1-888-510-1765 and the international dial-in number is 1-719-325-2463. The passcode for the call is 5027232. A live webcast of the conference call will also be available online at http://ir.allisontransmission.com. Additionally, the second quarter results press release will be available on the 'News Releases' page of the website.

For those unable to participate in the conference call, a replay will be available from 7:30 p.m. EDT on July 29 until 11:59 p.m. EDT on August 5. The replay dial-in phone number is 877-870-5176 and the international replay dial-in number is 858-384-5517. The replay passcode is 5027232.

About Allison Transmission
Allison Transmission is the world's largest manufacturer of fully-automatic transmissions for medium- and heavy-duty commercial vehicles, medium- and heavy-tactical U.S. military vehicles and hybrid-propulsion systems for transit buses. Allison transmissions are used in a variety of applications including on-highway trucks (distribution, refuse, construction, fire and emergency), buses (primarily school and transit), motor homes, off-highway vehicles and equipment (primarily energy and mining) and military vehicles (wheeled and tracked). Founded in 1915, the Allison business is headquartered in Indianapolis, Ind., USA and employs approximately 2,800 people. Allison has manufacturing facilities and customization centers located in China, The Netherlands, Brazil, India and Hungary, with a global presence, serving customers in North America, Europe, Asia, Australia, South America and Africa. Allison also has approximately 1,400 independent distributor and dealer locations worldwide. More information about Allison is available at www.allisontransmission.com.

SOURCE Allison Transmission Holdings Inc.

Investor Relations, ir@allisontransmission.com, 317-242-3078, Media Relations, media@allisontransmission.com, 317-242-5000