Allison Transmission (NYSE:ALSN) reported quarterly earnings of $1.63 per share which missed the analyst consensus estimate of $1.84 by 11.32 percent. This is a 28.19 percent decrease over earnings of $2.27 per share from the same period last year. The company reported quarterly sales of $693.000 million which missed the analyst consensus estimate of $760.042 million by 8.82 percent. This is a 15.90 percent decrease over sales of $824.000 million the same period last year.