Allison Transmission announced the production of its 500,000th fully automatic 4000 Series transmission. Benefiting a wide range of commercial-duty vehicles, the transmission series is used in applications that include refuse, construction, fire and emergency, distribution, coach and transit bus and motorhomes.

Allison began producing the 4000 Series transmission at its Indianapolis headquarters in 1993. To accommodate demand outside of North America, in 2005 the company also began building the transmission at its facility in Szentgotthárd, Hungary.

Allison fully automatic transmissions use Continuous Power Technology to smoothly multiply engine torque and deliver more power to the wheels. As a result, fleets experience better productivity, fuel economy, comfort, safety and operational flexibility than those with manual and automated manual transmissions.