there is a thud sound and a slight jerk when the car goes from 1st to 2nd gear. on 1997 Volvo 850

when car accelerates from standing zero miles, there is a thud sound and a slight jerk as the automatic transmission goes from 1st to 2nd. But at higher speeds, the gear change is smooth.

Asked by for the 1997 Volvo 850
1 answer
possibly due for tranny service. bring to a tranny shop for this and have them run diagnostic. tranny tech. will advise.