My auto has shifted super hard since I bought it three months ago. I had a feeling it was wrong, but I had no Porsche reference to compare shifting quality.
So yesterday I've got the car in the air and I'm making another adjustment to the Bowden cable because it was hanging on to first gear way too long.
I finish up the adjustment, but spend some extra time walking around under the car with a bright flashlight looking for anything wrong.
I looked up over the torque tube just aft of the block on the passenger side and saw a metal vacuum tube with nothing attached to it. Looked a little deeper, and saw the hose that belonged to it attached to the other metal vacuum line. This four inches of vacuum line is a flexible coupler from one line to the other.
I removed the heat shields to make room for my hands, pulled it out, spent some time fiddling with the new hose, finally got it all back together, test drive: tadaa!!
The car's shift points are so smooth that I can't feel them. Perfectly seamless transition from one gear to the next. Plus the Bowden cable is adjusted correctly, now, too.
I also replaced the vacuum line at the tranny. If there's another vacuum hose upstream I'll replace it, too.
