[Sketchl]

Just for the records, it appears that the position of the central spline doesn’t contribution to the vibration as long as the tail shaft has been balance correctly.

The main factor which contributed to my tail shaft vibration is the mis-alignment of the crank shaft and gearbox input shaft and at the same time keeping the central tail shaft mount in its correct position.

Good luck and trust the info helps 🍀

 

[pangolin]

What did you do to align the engine to gearbox? Did you adjust the rear mount bushing to the right to get the laser to point at the trans input shaft? I have installed mine with a hydraulic press, and I can't imagine actually adjusting it under the car.

I have respondent in my thread indicate that giubo should not be over torqued.

 

[Sketchl]

Ciao Pangolin,
It's all in the position of the engine and it's mounts as gearbox is fixed. Loosen all the engine mounts and jiggle the engine until it's sitting in it's correct position, you might need to elongate some holes.
Also very important that all the mounts are in a relaxed state (not twisted or stressed) when secured as any tension in the mounts will transfer to the tail shaft!!
Saluti