Lawrence Dewey
Analyst · Citi
Thank you, Dave. Good afternoon, and thank you for joining us today. Following strong first quarter results, we are pleased to report continued sound financial performance. This performance was supported by attractive year-over-year growth in our core North America On-Highway end market and in our Outside North America Off-Highway end market, despite signs of slowing economic growth rates and decreased demand for transmissions used in North America energy sector hydraulic fracturing processes.
During the second quarter, Allison continued to demonstrate strong operating margins and a robust level of cash flow while simultaneously investing in growth opportunities, including underserved markets and expanding manufacturing capabilities outside North America, and Allison remains committed to debt reduction and the return of capital to shareholders.
I'll now move to Slide 4 of the presentation. On today's call, I'll provide you with an overview of our second quarter 2012 performance, including sales by end market. Dave will review the second quarter 2012 financial performance, including adjusted EBITDA and free cash flow. I'll then provide an overview of our end markets and wrap up the prepared comments with an updated full year 2012 guidance prior to Q&A.
Now to Slide 5 of the presentation, our Q2 2012 performance summary. Net sales increased approximately 1% from the same period in 2011, principally driven by increased demand for North America On-Highway, Wheeled Military and Outside North America Off-Highway products, supported by price increases on certain products. Growth in these markets was largely offset by decreased demand in the North America Off-Highway energy sector, resulting from weakness in natural gas pricing and fewer sales of North America Hybrid-Propulsion Systems for Transit Buses.
Our Outside North America On-Highway net sales were in line with the prior year due to weakness in European end markets, largely offsetting growth in China and Latin America. Gross margin increased 100 basis points from the same period in 2011, principally driven by price increases on certain products and improved manufacturing performance, partially offset by unfavorable sales mix.
Adjusted net income increased $19 million, excluding the 2011 debt retirement charge of $57 million. The net increase was principally driven by increased gross profit, decreased global commercial spending activities, net of higher 2011 technology-related license expense.
Adjusted net income was also impacted by decreased cash interest expense as a result of debt repayments and purchases, partially offset by a warranty expense charge for the dual power inverter module extended coverage program, favorable 2011 product warranty expense adjustments, increased product initiative spending and increased other expense, net.
Adjusted free cash flow increased approximately 18% to $80 million, principally driven by increased net cash provided by operating activities and partially offset by increased capital expenditures attributable to the continued expansion of our India facility, which is expected to be completed during the third quarter of 2012. Other factors include increased product initiative spending and investments in productivity and replacement programs. The increased capital expenditures were partially offset by the construction of our Hungary manufacturing facility in 2011.
Please turn to Slide 6 of the presentation for our Q2 2012 sales performance. North America On-Highway continued its recovery with net sales up 15% from the same period in 2011. Rugged Duty series and school bus models were the primary drivers of this performance, followed by a smaller increase in motor home models. These increases were partially offset by reduced Highway series models.
North America Hybrid-Propulsion Systems for Transit Bus, net sales were down 55% from the same period in 2011, principally due to intra-year movements in the timing of orders. North America Off-Highway net sales were down 37% from the same period in 2011, principally driven by lower demand from hydraulic fracturing applications due to weakness in natural gas pricing resulting from higher-than-normal inventory levels during the quarter.
Military net sales were up 16% from the same period in 2011, principally driven by increased wheeled military products requirements. Outside North America, On-Highway net sales were up 1% from the same period in 2011, reflecting strength in China and Latin America, being offset by a weaker environment in Europe.
Despite challenging economic conditions, we continue to pursue our strategic priorities, including regional marketing efforts to increase the penetration level of fully automatic transmissions and attainment of additional vehicle releases in key emerging growth markets.
Outside North America Off-Highway, net sales were up 43% from the same period in 2011, principally driven by continued strong demand from the mining and energy sectors and our increased penetration in those end markets.
Service parts, support equipment and other net sales were up 2% from the same period in 2011, principally driven by price increases on certain products, support equipment sales commensurate with increased transmission unit volume and increased global on-highway service parts sales, partially offset by decreased global off-highway service parts sales.
Now I'll turn the call back over to Dave Graziosi.