Originally Posted by Jeffman
Sounds normal for somebody with Cobb and Alpina TCU flash. I have it too and that is how it behaves. It goes away and acts fine in a few minutes.
I've flashed Cobb maps with a variety of TCU flashes already in place (not just Alpina). I don't have any clunks or anything like that.
However, right after I flash a map and drive off the car seems to stay in 3rd gear until I get going fast enough for it to up shift to 4th. I see this behavior regardless of TCU flash. After it completes the first up shift to 4th then it reverts back to normal shifting behavior from there on out. I have a feeling this is standard behavior right after a new map is flashed. I have an 09 AT x drive.