what symptoms call for trans fluid flush?

I have this 94 GP SE 3.1L 134kmiles and it has trans problems.
When in D, it barely accelerates from a stop. I have to shift down to 2 or 1 to go anywhere. But once above 30mph i can shift it back to D and have no slipping. feels fine on the highway, etc.

should i get a trans fluid flush? i do not think that it has ever been done on this car. i got it with 131kmiles on it. a flush couldnt make it worse could it?

sounds to me like it is time for an overhaul. Do you have the SES lighton?

it comes on sometimes. sometimes not.

i can get it scanned when its off right?

it comes on sometimes. sometimes not.

i can get it scanned when its off right?

yes, the pcm should store the codes in the history.

DO NOT get a fluid flush/exchange. There is 95% chance that you will ruin your transmission. It sounds as if you have a shift solenoid sticking (if you have teh electronic transmission). Try a trans additive like Trans-x or Seafoam, and see if the offending valve frees up. If not, you probably need an overhaul.