So I am not sure if this noise has always been there and haven't noticed it our if it is new but around 2100 to 2300 RPMs on my 06 CTD there is a metalic knock/tap. Its not real loud and it only seems to do it when it is not under a load, like driving down the highway or when you are ready to shift gears. Truck has 96,000 on it, smarty intake and exhaust. Just me being crazy or something to worry about. thanks for any help.
really no one with any suggestions, it sounds like it is coming from the right side. I have to take a 4000 mile trip soon and would really like to know if it is something to be concerned about