David Graziosi
Analyst · Goldman Sachs
Thank you, Larry. Please turn to Slide 7 of the presentation for the Q3 financial performance summary. Given Larry's comments, I'll focus on other income statement line items and adjusted EBITDA.
Selling, general and administrative expenses decreased $5 million, or 5%, from the same period in 2011. The decrease was principally driven by lower global spending activities, partially offset by the elimination of favorable 2011 product warranty expense adjustments.
Engineering, research and development expenses increased $4 million, or 12%, compared to the same period in 2011 principally due to $12 million of certain technology-related license expenses from the execution of a co-development agreement with Fallbrook Technologies and a partial contingent license exclusivity payment to Torotrak, partially offset by the timing of product initiative spending.
Interest expense, net, decreased $23 million or 36% from the same period in 2011, principally driven by an $18 million decrease in mark-to-market expense for our interest rate derivatives, $13 million of lower interest expense as a result of debt repayments and purchases, partially offset by higher interest rates and amortization of deferred financing fees related to refinancing of our senior secured credit facility and the effectiveness of new interest rate swaps at higher interest rates.
Other expense, net, decreased $2 million from the same period in 2011, principally driven by favorable foreign exchange, higher gains on derivative contracts and a decrease in premiums and expenses related to redemptions of long-term debt, partially offset by the impairment of technology-related investments and decreased grant program income.
Income tax expense for the quarter was $17 million, resulting in an effective tax rate of 34.6% versus an effective tax rate of 32% for the same period in 2011. The effective tax rate increase was principally driven by higher discrete activities in the same period in 2011.
Adjusted EBITDA, excluding technology-related license expenses, for the quarter was $172 million, or 34.8% of net sales, compared to $193 million, or 33.7% of net sales, for the same period in 2011. The decrease in adjusted EBITDA was principally driven by a decreased gross profit, partially offset by lower global and -- commercial and engineering research and development spending activities. Increase in adjusted EBITDA margin, excluding technology-related license expenses of approximately 110 basis points, was principally driven by the previously referenced gross margin improvement and lower global and -- lower global commercial and engineering research and development spending activities.
Please turn to Slide 8 of the presentation for the Q3 cash flow performance summary. Given Larry's comments, I'll focus on specific cash flow activity during the third quarter and provide some fourth quarter 2012 guidance.
Allison continued to demonstrate a solid, reoccurring free cash flow conversion rate during the third quarter despite weakening sales demand, inconsistent commercial vehicle production schedules and labor negotiations planning. As Larry mentioned, we refinanced a $850 million of our 2014 senior secured Credit Facility Term B-1 loan during the third quarter. Early this month, we refinanced an additional $300 million of the Term B-1 loan, resulting in a remaining August 2012/2014 maturity of $500 million. These latest refinancing activities, together with other refinancing transactions completed in 2011 and the first quarter of 2012, have better aligned Allison's debt maturities with this over-the-cycle free cash flow and longer-term net leverage targets.
During the quarter, we also repaid $105 million of debt and paid a dividend of $0.06 per common share. Allison ended the quarter with $82 million of cash, $372 million of revolver availability after letters of credit and net leverage of 3.89.
Looking forward to the fourth quarter, we plan to pay our quarterly dividend of $0.06 per common share. We will announce the record date and payment date of the dividend by press release once determined. Now I'll turn the call over to Larry Dewey.