Recently began hearing a clunk from the rear of my 850 Turbo wagon (175K miles) when going over dips in the road. No difference if the engine is under load or if I'm braking. I lifted each corner of the car up to see if the wheel was tight and spun freely. Everything looked OK. I just finished jacking the car up and checking the rear springs (OK), checked if the rear shocks were loose (they weren't; replaces 30K miles ago) and checked the exhuast for clearance (OK) and if anything was loose (everything appears tight).

What's the next thing to check? Do the rear shocks have any kind of rubber mount that can go bad? Any other rear suspension parts to check?

Thanks in advance.