Hi; New member with a problem I've been eager to ask. Picked up a 2009 C14 last September and love it. It has 32,000 miles and I took it to a small shop this spring for a valve adjust. Engine fine after valve adjust but oddly upon leaving shop I noticed a distinct sort of pulsing whine in second gear. I am pretty tuned in to machines and had not noticed it before. I called the mechanic and took it back for him to ride and he said, "yes it sure does" pretty much as I expected. It did not whine prior to my leaving it at the shop. Rear fluid is fine. I changed out the expensive synthetic oil he had installed just to see and it is the same with 10-40. I am not wanting to ride much till I find out if it could be harmful. Any of you folks ever experience this. Thanks and I will figure out how to conjure up archives to avoid asking too many questions.