Search Results

Tolerance stackups rank among the more important tools available to a design team for gaining insight into a product design. Careful allocation of tolerances between the features in a product help balance the often conflicting requirements of design and manufacturing. Prototypes of new products are expected to assemble and function with little difficulty. When designing a new product that is part of a large product family, tolerance stackups are even more important. The sub-assemblies that make up a product family must be interchangeable and the interactions between sub-assemblies must be well understood. This paper will discuss various aspects of stackups in the design process along with a number of real-life factors that complicate the stackups.

New materials, enhanced actuation, and innovative mechanisms are contributing to a higher level of performance for transmission gear shifting in trucks. Starting from fundamental principles, this paper describes developments in technology that are improving capability and holding back price increases of the synchronizing function in transmissions for medium duty and heavy duty vehicles.