Picked up my truck from the shop yesterday, I was haveing my drive shaft re-balanced due to some minor but noticable vibration coming from the rear. The guy told me it was out of balance and that a weight had deffinatly fallen off, however, he would be surprised if this was the cause of my problem
. He said he had been doing this type of work now for 20 years and had never seen an issue of an out of balanced shaft being such a contributer to noticable vibrations, although not to say it couldnt happen. They did weld two, pretty good sized weights on it. Started down the road and she was vibration free
, except for road imperfections of course. So happy now that its done and smooth sailing. I would encourage folks to check this out as a possibility as it seems to be widely overlooked based on the VERY few places that do this type of work in my area at least, and what the guy that balanced it had told me.