AV, you need to go back to the dealer and get the service manager to go for a ride with you. You need to replicate the problem for the tech. If it's flairing between shifts, is it just 2nd to 3rd or 3rd to 4th. There are a number of things that could be causing this. If the dealer said all was well and it isn't, drive with a light foot back to the dealer and show them what you are describing. This could also be a sticking pressure regulator valve. Bottom line, the tech who worked on it has to see the problem to get a better idea what the cause actually is...
1987 BMW 325
[This message has been edited by jeffsr (edited 06-02-2000).]