Allison Transmission’s powershifting Twin Countershaft gearbox to offer improved fuel efficiency for tractor units across the entire drive cycle

Pioneering 10-speed fully automatic transmission incorporates Allison’s torque converter and twin countershaft design to provide both optimised acceleration and higher fuel economy across a range of duty cycles.

Indianapolis, Indiana, USA – Allison Transmission has unveiled a new and unique fully automatic transmission for tractor units at the 2011 Mid-America Trucking Show in Louisville, Kentucky. The highly innovative gearbox, set to debut in North America in late 2012, has been designed specifically to maximise productivity and fuel efficiency during both cruising and stop-start operation. As the first powershifting, twin countershaft design for commercial vehicles, the transmission incorporates Allison’s proven torque converter technology to deliver uninterrupted power to the wheels. This functionality delivers productivity and fuel efficiency to stop-and-go portions of a route, while the 10-speed countershaft architecture offers superior fuel economy during cruising on highways. Coupled with the smooth shifting and ease of operation benefits offered by a fully-automatic, this new technology provides OEMs and operators with a competitive and fuel efficient alternative to automated manual gearboxes. “Initial in-vehicle tests have shown worthwhile gains in fuel economy, and we achieved increases in vehicle miles-per-workday,” says Lou Gilbert, Allison Transmission’s Director of North American Market Development. “Our rigorous testing has also shown this new transmission offers better fuel economy than an automated manual in the targeted duty cycle markets for which it was developed.” Continuing Allison’s commitment to offer excellent fuel efficiency, the new transmission will also incorporate a range of intelligent features including Load Based Shift Schedules (LBSS), Reduced Engine Load at Stop (RELS) and more. Tuned to the vehicle powertrain, these features deliver an optimum blend of performance and economy specific to application, customer need and duty cycle. The new development also draws on Allison’s extensive experience to build durable transmissions that minimise whole life costs, including the torque converter that cushions and protects the entire drivetrain, as well as service features such as prognostics that allows operators to quickly monitor oil and filter life. At the Mid-America Truck Show, Allison demonstrated a Peterbilt tractor incorporating the new transmission for potential customers to drive and evaluate. “Once you combine exceptional fuel economy and miles-per-day with Allison quality, reliability and durability, you’ve got a transmission that will redefine tractor performance and operating efficiencies,” concludes Gilbert. 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 2,750 people. Regional headquarters with dedicated support staff are located in China, The Netherlands, Brazil, India and Japan. With a global presence in 80 countries, Allison has over 1,550 distributor and dealer locations. More information about Allison is available at www.allisontransmission.com. 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: the loss or consolidation of any one of our significant customers; our substantial indebtedness, which could adversely affect our financial health, restrict our activities and affect our ability to meet our obligations; the adverse impact of competitors’ actions; the discontinuation of a particular vehicle model for which we are a significant supplier; 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; increases in cost of or disruption of the supply of raw materials; increased crude oil and energy prices and overall economic conditions; and continued volatility in and disruption to the global economic environment. 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. ### Press enquiries Claire Dumbreck, Propel Technology, Bloxham Mill, Barford Road, Bloxham, Banbury, Oxfordshire, UK, OX15 4FF. +44 (0)1295 724130 / +44 (0) 7768 773857. claire@propel-technology.com Eric Dickerson, Allison Transmission, Inc., Corporate Communications, Tel: +1 (317) 242-2688, eric.dickerson@allisontransmission.com

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