Changed the transmission mount back to stock style.
VIBRATIONS 90% GONE!
After all those years chasing the vibrations I almost gave up.
Cause of the vibrations:
Wrong balanced crankshaft
Energy suspension transmission mount
Driveshaft out of balance
The vibration change with speed.
The faster you go the stronger it get, but not faster.
At deceleration it get faster.
The engine runs smooth af now with the crankshaft rebalanced.
Can feel the vibration coming straight from the floor. It’s the area where the tranny mount is mounted.
Still got...
I am checking the tranny mount next.
Got a mount from energy suspension installed.
Feel the vibration coming from the floor.
Before installing the mount my transmission did not line up correctly.
The rubber always did come out of the mount.
No, different shop. Hey build drag cars. I think he knew what he is doing.
I got I Beam rods. Those are really light. Maybe that causes those big holes.