Abstract: A method for designing a synchronizer in a transmission which has a plurality of components each defined by one or more parameters is provided. The method includes selecting a first parameter having a relationship to the transmission. A second parameter is selected based off of a relationship to the first parameter. Then, the synchronizer components are designed while simulating a synchronization episode using the first and second parameters. The synchronization episode is divided into stages wherein for any given stage at least one component parameter is calculated or selected.

Abstract: An objective method is provided for selecting gear ratios for use in a motor vehicle transmission having multiple selectable gears. The method includes selecting gear ratios for a specific application includes calculating a low gear ratio, and a high gear ratio based upon vehicle parameters and performance requirements. The total ratio spread is determined by dividing the low gear ratio by the high gear ratio. Using the total ratio spread, a geometric sequence is created with a plurality of terms, such that each of the terms respectively represent the ratio steps between the gears. Lastly, each gear ratio is divided by its respective ratio step plus one to find the gear ratio for the next gear. This method provides an objective method for selecting gear ratios, such that the steps between each of the ratios are uniformly progressive.