The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The shifting mechanism has a gear selection device. A scanning apparatus positioned within the common process chamber is operable to selectively translate a workpiece holder in one or more directions through each of the plurality of ion beamlines within the processing region, and a common dosimetry apparatus within the common process chamber is operable to measure one or more properties of each of the plurality of ion beamlines. Another feature provided by the present invention is a sensor cross-check histogram in which sensor indicated rate differences are stored.