For the 2010 model year, Allison Transmission introduces 2nd Reverse, available on all Allison 4700 and 4800 models.
This new feature offers a second “deep reverse” in addition to the standard reverse and, according to the maker, will provide greater control and engine braking during operation on steep grades. It will also enable more maneuverability when operating in confined spaces, Allison added.
A vehicle in 2nd Reverse will have a slow creep capability with high engine speeds. With a mechanical ratio of 17.12, it will have an effective torque converter multiplied ratio up to 32.5:1.
The feature provides overall better performance and enhanced applicability for a variety of applications, Allison said. It will be available mid-year 2010 on Rugged Duty Series, Emergency Vehicle Series and Specialty Series model transmissions.
