Have a look for free play at the forward top wishbone bushes; the one that shares the mounting brackets with the shock top mount. You might need to shim up the gap with some washers as the brackets are set much further apart than the length of the wishbone bush centre tube. I've had to straighten up and shim this connection on all three chassis that I've had.
Of course, you might already have this done!
Best of luck finding the source of the clattering.

Last edited by RedThree; 17/02/17 12:39 PM.