Aaaanh !!!! Wrong answer.
I drove his car. He drove mine. We swapped tires and did the same again. Then another Plastic Fantastic stopped to say hello.
Conclusion:
The vibration does not come from the tires.
The vibration does not come from the engine.
So it must be drive train.
All the U-joints were replaced. The driveshaft was balanced.
I am thinking I might check all the U-joints
again but
Mañana
Tomorrow I will also check my driveline angles,
again.
Hmmm, if all that checks out, that leaves:
The transmission. The tail housing bushing was really wasted. The yoke had also been significantly damaged too. I suppose it is possible that there is something unhappy inside the Muncie. Maybe the tail housing itself was deformed ?
Then there is the carrier bushing, that might have been damaged as well leading to vibration, no ? Is there anyway to check that without tearing into it ?
Next step:
Since I have the T5 and
IF everything else checks out... I may do a transmission swap to eliminate that source. The T5 is a know good unit.