GM has announced that it has completed the sale of its Allison Transmission business. The commercial and military transmission part of the company was sold to The Carlyle Group and Onex ...

Paired with the Allison 1000 five-speed automatic transmission, this powertrain combo made towing and hauling feel effortless. Drivers who own a 2001 Silverado 2500 HD often praise its reliability.

Indianapolis-based Allison Transmission, a leading global provider of commercial-duty automatic transmissions and other ...