Without a functional transmission system, your vehicle will not be able to make full use out of a high-powered engine. The transmission system is what transfers the engine's power output to the wheels, allowing you to adjust and shift between different speeds. An efficient transmission system lets you quickly switch between gears, anytime and anywhere you want! And if your vehicle uses a hydraulic clutch, each gear change is made possible by the Toyota clutch master cylinder. The Toyota clutch master cylinder houses a reservoir for hydraulic fluid. When you step on the clutch, a plunger pushes through the master cylinder and forces the hydraulic fluid to the slave cylinder. The increased pressure helps the slave cylinder disengage the clutch.