After a short hiatus during the 82 production year, manual transmissions were once again installed in Corvettes. The 4+3 transmission was the first to be introduced into the C4 line, later to be replaced by the ZF-designed six-speed. Both of these transmissions used a hydraulic clutch system that was new to Corvette. While there are a few minor changes that occurred during the C4 production, the system has remained the same, and the steps to repair this system are the same, regardless of what year C4 is being worked on. When replacing any components for the clutch system, its always advisable to replace the clutch master cylinder and the slave cylinder at the same time. Because both the slave and master cylinder are the same age, its only a matter of time until the other part will fail.