Allison Transmission Offers 5 Percent Better Fuel Economy with TC10 for Tractor Trucks

   Allison Transmission Offers 5 Percent Better Fuel Economy with TC10 for
                                Tractor Trucks

New tractor transmission demonstrates improvement over manual and automated
manual transmissions

PR Newswire

INDIANAPOLIS, March 20, 2013

INDIANAPOLIS, March 20, 2013 /PRNewswire/ -- Allison Transmission Holdings
Inc. (NYSE: ALSN) today announced that test fleet users achieved an average 5
percent fuel economy improvement with the Allison TC10™ tractor transmission
over their current manual and automated manual transmissions.

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"Approximately 100 major fleets throughout the U.S., representing a variety of
applications, have been using our TC10 transmission in real world duty cycles
over the last two years," said Jim Wanaselja, vice president of North America
marketing, sales and service for Allison Transmission. "The better fuel
economy, coupled with Allison's renowned reliability, durability and ease of
operation makes the TC10 a powerful tool for improving fleet efficiency."

The TC10 is specifically designed for both city and highway tractor duty
cycles and provides a blended architecture with full power shifts, a torque
converter and a twin countershaft gear box. It is fully automatic and offers
smooth, seamless shifting through 10 gear ranges. This optimizes acceleration
and fuel economy, making this transmission especially ideal for distribution
applications where a tractor-trailer splits its work cycle between city and
highway conditions.

Rated up to 600 horsepower and 1,700 pound-feet of torque at launch, the TC10
is designed with 10 forward speeds and two reverse. It comes equipped with
Allison's newest generation of electronic controls which provide superior fuel
economy features, prognostics to eliminate unnecessary oil and filter changes,
and enhanced shift selector functionality. A five-year or 750,000 mile
warranty is also offered.

The TC10 will be on display this week at the Mid-America Trucking Show in
Louisville in both the Allison Transmission and International Trucks booths.

Production of the new transmission began earlier this month.

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 approximately 1,400 independent distributor and
dealer locations worldwide. More information about Allison is available at

Forward-Looking Statements

This press release may contain forward-looking statements. All statements
other than statements of historical fact contained in this press release are
forward-looking statements. In some cases, you can identify forward-looking
statements by terminology such as "may," "will," "should," "expect," "plans,"
"project," "anticipate," "believe," "estimate," "predict," "intend,"
"forecast," "could," "potential," "continue" or the negative of these terms or
other similar terms or phrases. Forward-looking statements are not guarantees
of future performance and involve known and unknown risks. Factors which may
cause the actual results to differ materially from those anticipated at the
time the forward-looking statements are made include, but are not limited to:
risks related to our substantial indebtedness; our participation in markets
that are competitive; general economic and industry conditions; our ability to
prepare for, respond to and successfully achieve our objectives relating to
technological and market developments and changing customer needs; the failure
of markets outside North America to increase adoption of fully-automatic
transmissions; the discovery of defects in our products, resulting in delays
in new model launches, recall campaigns and/or increased warranty costs and
reduction in future sales or damage to our brand and reputation; the
concentration of our net sales in our top five customers and the loss of any
one of these; risks associated with our international operations; brand and
reputational risks; our intention to pay dividends; and labor strikes, work
stoppages or similar labor disputes, which could significantly disrupt our
operations or those of our principal customers. Although we believe the
expectations reflected in such forward-looking statements are based upon
reasonable assumptions, we can give no assurance that the expectations will be
attained or that any deviation will not be material. All information is as of
the date of this press release, and we undertake no obligation to update any
forward-looking statement to conform the statement to actual results or
changes in expectations.

SOURCE Allison Transmission Holdings Inc.

Contact: Melissa Sauer, Allison Transmission Inc., (317) 242-5000,
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