Knocking rear end

[allonblack]

Hey guys

i've been the proud owner of a Yeti ASR-c for 3 years now but have had a slight problem in the last few weeks.

when descending over fast rocky/rooty terrain there is a slight knocking from the back wheel. I've tried 2 sets of wheels, replaced all bearings in wheels, rear shock, shock bushings, chain, cassette, chainset, and checked that everything is fully tight and there are no cracks.

has anyone else ever had this problem? It's driving me a bit mad! 

Cheers

Neil

[Andrew]

Nothing feels loose when standing? Are the inserts in the carbon coming lose?

[allonblack]

I can feel no play when pulling/pushing on any part of the rear end. The rear triangle was replaced in november 2014 so it shouldnt be that, but I will give the frame a full strip down, clean and service as well as all parts and see if it continues after the rebuild.