Allison is the world’s largest manufacturer of fully-automatic transmissions for medium- and heavy-duty commercial vehicles, with 63% global market share of fully-automatic transmissions.For fiscal 2015, the company reported net sales of $1.99 billion. A major chunk of sales, to be precise, about 53% came from North American On-Highway vehicles. About 30-40% of Allison’s North America On-Highway market volume is driven by municipal spending, thereby reducing end-market volatility.