to herein as u201c synchronizer clutch u201d used in power transmissions include a well known dog clutch integrated with a speed matching device such as a cone clutch during operation of the transmission if the dog teeth of the dog clutch make contact with a gear and the two parts are spinning at different speeds the teeth will fail to engage and a loud grinding sound will be heard as they clatter together for this reason a synchronizer mechanism or synchronizer clutch is used which consists of a cone clutch before the teeth engage the cone clutch engages first which brings the two rotating elements to the same speed using friction until synchronization occurs the teeth are prevented from making contact it should be appreciated that the exact design of the synchronizer clutch is within a designer 39 s choice for satisfying packaging and performance requirements a synchronizer clutch is optionally configured to be a two position clutch having an engaged position and a neutral or free position a synchronizer clutch is optionally configured to be a three position clutch having a first engaged position a second engaged position and a neutral position embodiments disclosed herein use synchronizer clutches to enable the pre selection of gear sets by a control system not shown for smooth transition between operating modes of the.