On February 19, 2013, Allison Transmission Holdings, Inc. ("Allison") published an earnings release reporting its financial results for the three months and year ended December 31, 2012. A copy of the earnings release is attached as Exhibit 99.1 hereto. Following the publication of the earnings release, Allison will host an earnings call on which its financial results for the three months and year ended December 31, 2012 will be discussed. The investor presentation materials that will be used for the call are attached as Exhibit 99.2 hereto.

On February 19, 2013, Allison posted the materials attached as Exhibits 99.1 and 99.2 on its web site (www.allisontransmission.com).

As discussed on page 2 of Exhibit 99.2, the investor presentation contains forward-looking statements within the meaning of the federal securities laws. These statements are present expectations, and are subject to the limitations listed therein and in Allison's other Securities and Exchange Commission filings, including that actual events or results may differ materially from those in the forward-looking statements.

The foregoing information (including the exhibits hereto) is being furnished and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

(d) Exhibits.

        Exhibit
        Number    Description
         99.1     Earnings release dated February 19, 2013.

         99.2     Investor presentation materials dated February 19, 2013.