The Allison 1000 transmission was first introduced in 2001, primarily in Chevrolet/GMC trucks and later in other heavy-duty applications. It boasts robust internal components engineered to handle increased torque demands and offers revised gear ratios suitable for various heavy-duty tasks. Monster offers a diverse range of builds tailored specifically for the Allison 1000, allowing for increased horsepower and torque ratings. These builds include options such as heavy-duty, super-duty, and super-duty Xtreme. Monster Diesel Performance Transmissions have been prominently featured on TruckU TV and other popular shows, showcasing their reliability and performance prowess.