Mack Trucks, one of North America’s largest producers of heavy-duty trucks, has selected the Allison 4500 Rugged Duty Series (RDS) as the exclusive transmission currently offered for its new compressed natural gas (CNG)-powered Mack Granite model.

The 4500 RDS fully automatic transmission has been offered in the Mack Granite diesel model for more than 20 years. When Mack set out to develop a vehicle for refuse collection customers seeking an alternative fuel solution, they were able to pair the proven 4500 RDS transmission with a 320-horsepower Cummins L9N engine. The CNG-powered Mack Granite truck will enable customers to reduce emissions to meet upcoming changes to regulatory standards.

Allison said that its collaboration with Mack on the CNG model is a testament to the company’s commitment to offering a portfolio of conventional, electric hybrid and fully electric propulsion solutions designed to meet the needs of customers as they strive to reduce emissions.

Allison transmissions, when paired with natural gas engines, have the ability to deliver up to 90% noise reduction compared to a diesel-powered vehicle. The CNG-powered Mack Granite will enable customers to optimize the productivity of their fleets, improve fuel economy, and reduce noise and emissions. We are pleased to partner with Mack on this sustainability initiative.

—Rohan Barua, Vice President, North America Sales, Global Channel and Aftermarket, Allison Transmission