I had a funny issue with 2nd gear (hard to get into) when I bought the car (2002 S with 12,000 miles). The transmission was replaced before I took delivery of the car. 10,000 miles later she shifts as smooth as silk.
Dealer diagnosis is that the transmission is failed. Porsche requires them to open it up and make a repair/replace assessment. They can only get to it 2 weeks from now so I will be out of a Porsche for 3 weeks... Good thing it is CPO.