On Sun, 02 Jan 2005 21:37:33 GMT, dph > wrote:

>I have had trouble with my A6 4.2 automatic transmission for about a
>year and the dealer can find nothing wrong.
>
>Intermittently when I accelerate from a dead stop the transmission does
>not deliver adequate power. Engine revs are appropriate for the speed
>but it feels like I have started in 2 or 3 gear. There is just no
>acceleration. With mild accelerator pressure the engine revs to 4000
>then abruptly shifts to second. Power is then OK. If you really need
>to you can push the accelerator hard and it like shifting down from a
>higher gear.
>
>This happens both when the car is cold and when it is hot.
>
>The dealer has had it three times and finds no codes from the
>transmission and they keep having me drive a mechanic around but of
>course it won't happen then.
>
>I am leaving it at the dealership this week and giving them permission
>to drive it until they experience the problem.0
>
>Anyone have any ideas what may be the cause?

Does your A6 have DSC? Can it be shut off from a dash switch? Try shutting it
off and see if anything changes...