Allison Transmission designs and manufacturers automatic transmissions for medium- and heavy- duty commercial vehicles. Its products are used in on-highway, off-highway and vehicles. Headquartered in Indianapolis, IN, Allison Transmission employs approximately 3,400 people.

"This is another important step to strengthen our liquidity and provide resources to support our heavy investments in new products and technology," said Rick Wagoner, GM chairman and CEO. "At the same time, this sale will position Allison for growth with strong partners in Carlyle and Onex, which have well-established track records of working effectively with their management teams, unions and employees," Wagoner added.