Proper Shifting of Synchronized Manual Transmissions - Rev. 1 Introduction Currently, most manual transmissions are synchronized, which means gear shifts can be completed quickly and with low shift-knob force for most operating conditions. Synchronizers make this possible because they equalize the speeds of rotating gears and Used Honda with Manual Transmission for Sale on carmax.com. Search new and used cars, research vehicle models, and compare cars, all online at carmax.com Used Chevrolet with Manual Transmission for Sale on carmax.com. Search new and used cars, research vehicle models, and compare cars, all online at carmax.com A synchronizer is a manual transmission engagement assembly that rests between two gears and contains a set conical brass rings. When the brass rings are pressed together during a gear shift, they adjust and match the speed of the two gears, allowing them to smoothly engage. Often these are called "synchros" in everyday conversation. This is a video showing how a four speed, fully synchronized transmission works. Valvoline Synchromesh Manual Transmission Fluid • High performance manual Transmission lubricant designed to meet the extreme demands of passenger car manual Transmission gearbox applications • Enhanced performance in both low and high temperature operating conditions • Excellent wear protection under high loads and extreme pressure Get to know Synrevoice Technologies Inc. CEO & other corporate executives. Learn about the Board of Directors, Executive Committees and CEO compensation in this industry. Therefore, it would be impossible to throw the transmission into reverse while the car is moving forward; the dog teeth would never engage. However, they will make a lot of noise. Synchronizers. Manual transmissions in modern passenger cars use synchronizers, or synchros, to eliminate the need for double-clutching. A synchro's purpose is to " Great Family Company " Star Star Star Star Star. Work/Life Balance. C