The driveline vibration at 65MPH that has been a more than irritating is no
more. Over the past few days the service department had both driveshafts
balanced. That removed some of it. Next they did the fix that has worked for
a couple of folks on the TDR. They loosened the motor mount bolts and the
transmission mount, moved the truck about 100 feet in each direction, shut
it off in neutral so there was no bind and then torqued everything down.
Nice and smooth now.