MECHANICAL POWERTRAIN COMPONENT REPORT A look at some of the latest products and news from powertrain component and system suppliers.Fo r a comprehensive list of mechanical powertrain component suppliers, visit www.dieselprogress.com.
the Variable Modulated Main feature reduces main pressure when the clutch apply system does not require full main pressure. New wave friction plates reduce internal drag. The result is more efficient operation that helps improve fuel economy, the company said. shift. The transmission’s electronic controls monitor acceleration to deter- mine when to activate lockup. Allison also said its 4700 and 4800 models will be available with a second “deep reverse” in addition to the stan- dard reverse. This feature, the com- pany said, will provide greater control and engine braking during operation on steep grades as it will give vehicles 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, Allison said. The feature will be available mid- year 2010 on Rugged Duty Series, Emergency Vehicle Series and Specialty Series models.