Once again sorry for the lag, was away for the weekend. Thanks Chuck - PM replied. So finally got it out tonight and logged 3 PL files. I turned the alky system off, and have the AMS 500 set as low as it will go. I'm definitely convinced it's engine/RPM related - not chassis. However I will throw the PL files into a thread on the TT Forum as well. Is it possible to drop the shift RPM down a couple hundred RPM by adjusting the TV Cable back a click or two or is that a bad idea? What's the concensus to quiet down the valve train? Valve springs? Change out the Comp roller lifters?