I joined a flight club that has the Navomatic 300a in there 182. During my preflight the right aileron had a moderate rachety feel ( If that is a word) and the left side had is also, but 50% less. You could also feel it in the yoke. Of course my first thought was the clutch for the autopilot was stuck in the engaged position. I tested the unit on the ground and it performed to the manuals preflight, but again seemed like it didnt disengage when powered down. I had a AP on the field take a look at it and he pulled the inspection plate and said the unit was well lubricated. He also said his experiance with the unit was limited and could tell me if the unit was operating correctly. I spoke with some of the senior club members and they say that the feel is normal for the Navomatic. Can anybody confirm??????