This is my 3rd diesel, but my first CTD. 2000 Powerstroke and a 2003 Duramax. Been reading here since 2000 and now a member. My drone starts at 63 gets bad at 67 and fades away in the upper 60's. This is the speed range we like to pull our 5th wheel in. Been reading and searching on drone and vibration in the TDR. We like this truck but out highway time is not enjoyable in this speed range. Took the truck to the dealer... he took it for a test drive... said it was normal... smiled at me... I left. Can anyone recommend a good DC dealer in the Anderson, Indiana area? What next???? WE HAVE A CTD..... thanks...