I've been noticing what I deem to be a increasing noise after downshifting. Seems to be coming from underneath the Trek and more forward than rear. It happens when foot is OFF accelerator, in gear and decellerating. Kind of a mechanical growling noise...not very loud but makes ride sound unrefined. Definitely goes away when stepping on gas OR taking out of gear and coasting. I've climbed all under looking for loose bolts, rubbing parts, plastics, etc. Nothing. I've reported it to dealer and they say they hear it but don't know exactly what it is and have a call in to Subaru. Anyone having similar issue? Thoughts? Suggestions? Otherwise running well, no oil burn, no strange tire wear, nothing. Thanks folks!