News Release

Allison Transmission to Participate in the Deutsche Bank 2012 Global Industrials and Basic Materials Conference

June 6, 2012 at 4:05 PM EDT

INDIANAPOLIS, June 6, 2012 /PRNewswire/ -- Allison Transmission Holdings, Inc. (NYSE: ALSN), the world's largest manufacturer of commercial duty fully-automatic transmissions and hybrid-propulsion systems, today announced that Lawrence E. Dewey Chairman, President and Chief Executive Officer and David S. Graziosi, Executive Vice President, Chief Financial Officer and Treasurer will be speaking at the Deutsche Bank 2012 Global Industrials and Basic Materials Conference on Wednesday, June 13 at 8:40 a.m. Central Time. The conference will be held at The Westin Chicago River North, located at 320 North Dearborn Street in Chicago, IL.

The presentation materials will be available via a webcast on http://ir.allisontransmission.com/.  In addition, the presentation will be webcast in real-time and available to the public through the following Webcast URL:  http://www.media-server.com/m/p/d9gjc77a . The webcast replay will be available approximately 1 hour after the webcast presentation ends and is accessible for 90 days.

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, Indiana, U.S.A. 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 more than 1,500 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, +1-317-242-0185; Media Relations, media@allisontransmission.com, +1-317-242-5000