Jill,

If your previous mechanic is a great, honest volvo mechanic then try to make ammends. It's hard nowadays, to find a decent, honest mechanic. Buy him a nice bottle of scotch or something that he would appreciate. Don't mention anything about the car when you drop the gift. If the guy is decent, he'll understand you hurt his feelings and you're trying to make up. If that doesn't work. Move on.

The '98-'99 70 series tend to leak from the return hose, where it attaches to the pump. Tighten the clamp a bit with a 7mm socket and that should do it. Also replace the power steering fluid with fresh synthetic ATF fluid. Easy to do.

Procedure:
1)Suction as much as possible PS fluid from the reservoir with a turkey baster or large syringe(engine off). Fill with fluid.
2)Turn the car on, and move steering wheel lock to lock from right to left about 5 times. Turn engine off and repeat procedure 1 about 4 more times,

BINGO, you just refreshed your fluid. This might help the groaning.
Let us how it goes.

Cheers.

--
'88 240, '92 745, '98 v70 John, Tampa Bay