Södertälje won the first quarter final with 30 points, 93-63, two days ago and was strongest in the second meeting as well.
The series winner was certainly down by nine points, 26-35, after the first half.
But then the team stood for a real boost and won the third period by 30-12.
The match ended 82-69 to Södertälje who now leads the quarter-final series with 2-0.
Another victory and the team is ready for the semifinals.
Södertälje has 20 straight victories against Umeå.