Hello all-

I have an occasional noise from the rear of my '99 S70AWD that sounds like a spring shifting in its seat ... kind of a "boing" sound ...pretty loud.

It usually happens when I go through a shallow dip or rise in the road surface, after a long period of cruising on smooth roads.

Sometimes it does it when I just turn a corner with enough speed to raise the inside rear suspension a little. I've heard it a few times just braking or accelerating straight ahead.

Has anyone else heard this? Any idea what it is and how to fix?

I've got 48k miles on her now, but it's been doing it since about 20k.

Thanks.