Okay, I just bought an 86 Supra (3.0) and the clutch master cylinder went out (fluid leaking inside through firewall gave it away). I replaced the master cylinder and slave cylinder and bled the line. I drove around fine for a day with the exception of a strange faint pulsing sound when I changed gears. The next morning, I got in to drive to work and my car wouldn't go into any gears except reverse while running. It went smoothly into all gears while off. I replaced the clutch hose attached to the slave cylinder and re-bled the line. I started her up and same problem. I slapped it into reverse and then suddenly I could go into all gears with ease again while running. What does this sound like?