Transmission
The FW15C used a semi automatic transmission very similar to the FW14B, but with changes to the hydraulic activation system. A press button starting device by means of which the clutch comes under automatic control, attracted the drivers unreserved approval during a succession of tests, but they did not use it in races, preferring the notional, psychological reassurance of controlling the clutch pedal at the start.
The transmission also featured an automatic system. If the "auto-up" button is pressed, which could be at any time on the circuit, it will do automatic changes until the next time drivers call for a gearchange with the levers. The software is so programmed that it recognises when a driver calls for a gearchange before the automatic system is ready to do so and immediately hands back control to the manual system.
Read more about this topic: Williams FW15C