Addition to my original post: The clucking started after I had the car up on jack stands to flush the brakes. I thinking that taking the wheels off the ground, allowing the suspension travel to max out, probably finished off a bushing that was in bad shape. I know from personal experience that this happened to our 240 wagon when I replaced the struts a few years ago. Does this info point to any particular bushing on a 960/S90?
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Thanks for all the help. DougC ::::: 1981 242, IPD bars and Turbo wheels, M46:::::::1984 760, B23FT, M46, waiting to donate engine to 242:::::::1997 S90

DougC, yes 960s from '95 on are pretty much the same as V/S90s. The clunking is probably caused by worn rear control arm bushings. These cars (as opposed to 240/740/940 and early 960) have a greatly different front suspension with a large lower 'A' arm. The rear bushing is a large rubber doughnut. It provides better compliance than the earlier design-but the bushings are a weak point.They typically fail at 70-100K miles. Not real expensive to replace-maybe %200 for both sides. The right way is replace the bushings (which requires a press, I think), not the whole 'A' arm-aftermarket replacement arms are typically stamped steel cheapies which will not provide the low unsprung weight and strngth the factory cast arms give.
I just rejoined the 960/90 ranks myself-now have a nice black '96 960 with 153K. :)
sredwine '94 940 has 236K

S90 was just a re-badged 960, same car, maybe some minor option or trim change to justify the new name. The torsion (anti sway) bar links can cause a clunk. Small, cheap and easy to change.
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David Hunter

I had a similiar noise on my 91 740 turbo wagon. It would clunk/rattle over small road bumps/holes. Everything was tight. Problem was the strut.
Jack it up, pull the front wheels, lift the strut bellows & see if the strut shafts are leaking. Mine both were. Pulled one strut & the shaft rattled side to side. A real PITA to remove the strut insert nut but I swapped the strut insert & quiet.
good luck