The problem is with my 88 duke powered t-top car. It started when I tried to drive it after it has sat a while. The clutch was very soft, and I couldn't get it into gear. The fluid in the master was low. So I topped it off, pumped the clutch a while, and it got firm and I was able to drive it. The problem has gotten worse over time, and today when I wanted to drive it, no amount of pumping would make the clutch work well enough to drive the car. The slave is a Rodney Dickman slave with dual seal piston, but it is several years old. Since his are made of aluminum, not steel or iron, I've always wondered if they would "wear out' over time. In any case, is there an easy way to tell which is bad -- the slave or master?