For demanding vocational applications, Kenworth has announced the availability of the 7-speed Allison 4700 Rugged Duty Series fully automatic transmission with the 116.5-inch BBC Kenworth T880 short hood.
The 4700 RDS is available with the PACCAR MX-13 engine as well as the MX-11, which provides a 400-lb weight saving over the 13-liter engine. The transmission is said to improve driveability, allowing truck operators to creep slowly and perform other low-speed maneuvers. This level of control makes the Allison 4700 RDS ideal for ready-mix applications where drivers require a truck with maximum speed control for job site maneuverability in steep and difficult terrain, or with mixer trucks that move slowly while pouring concrete for street curbs, driveways, or other projects in confined spaces.
By coupling the Allison 4700 RDS with the PACCAR MX-11 and the T880 short hood, Kenworth says truck operators get a truck with a lighter gross combination weight and an additional 6 inches of body space on the chassis for more payload. The company calls it “a great choice” for other customers who need trucks with increased overall transmission ratios, such as those equipped with dump and refuse bodies as well as cranes.
A lower first-gear ratio and an optional second ‘deep reverse’ make the truck even more maneuverable, particularly on steep grades and in tight settings. The transmission also features no power interrupts, providing full power shifts and allowing full use of the engine’s horsepower.