The Auto-Tires-Trucks group has plenty of great stocks, but investors should always be looking for companies that are outperforming their peers. Is Allison Transmission (ALSN) one of those stocks right now? Let's take a closer look at the stock's year-to-date performance to find out.Allison Transmission is a member of the Auto-Tires-Trucks sector. This group includes 111 individual stocks and currently holds a Zacks Sector Rank of #10. The Zacks Sector Rank gauges the strength of our 16 individual sector gr ...