2001 XKR - 75000 miles

At the same part of my daily journey I get this noise as car goes over uneven surface and coming very slow (5mph) downhill down my very rough road to house as car goes a little side-to-side. Sounds a little like exhaust moving on mountings or suspension. On the open road at any speed over bumps it's perfect as is the handling.
BUT - just been on the ramp with my very trusted mechanic and unable to find any issues! Suspension is A1 (shocks, bushes, springs etc) exhaust is firmly mounted with no play and nothing loose, wheels/bearings no play. Would have been 100% on MOT test if taken today. Road tested A1 and they couldn't find any fault. I even bought a full set of polyurethane bushes but he said waste of money as originals perfect so will send them back.
There's nothing loose in the boot that I can see

I'm at a total loss to find cause. Anyone ever had this? Any suggestions pointers?
Whatever it is it's not serious but it's blood nuisance .

Steve

 

See if the inner rear brake pad is rattling. The mounting spring snaps off and it creates a low speed rattle.

 

Thanks for the suggestion - I'll check it out

 

Also if the ember brake cables are loose it will make weird rattles also.



Dave

 

Can you make the noise happen by bouncing the rear of the car? That might help to locate it.

I had a similar symptom, rattle over uneven payment when driving slow. It didn't go away until I changed the rear shocks.

 

Had exact same problem. Internal noise in Left Rear Shock. Dealer replaced both Rear Shocks (under new car warranty at the time).

 

Hi - I've bounced up and down on rear end and it's as quiet as can be - weird