I've searched and searched. All I can find is post on slipping. here's what I got. My g/f's car feels like someone hits it with a sledge hammer when it shifts between gears. the problem is random. It may be 3rd to 4th or 4th to 5th. it feels like you got the car reved up and drop it into drive. Can't find this problem online no where online. only slipping.

2001 audi a6 quatrro
2.8l
not sure exact tranny