The new trans mount is in but alas the vibration remains.
I am more convinced than before that it is somewhere in the rear end of the car.
We checked the lubricant in the axle cans and it is still there and fluid.
The diff lube is fresh,
Minimal rotary play in the driveshaft.
Wheel bearings are ok but not perfect. A little movement in the right rear wheel but not excessive.
flex discs ok
new center carrier and bearing.
Any other input here this is really frustrating

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1981 240D 143k 4 spd manual -SOLD

2004 VW Jetta TDI 5 speed 300k -still driven daily