Driveline Vibes: Imminent Problems or Just Annoying?

[RCP Phx]

I not sure about how your measuring the angles,but a stock crossmember puts the transfer case output shaft at about 4-5*down,meaning your pinion should point up about 3-4*.Driveshaft angle doesnt matter.

 

[smithz]

Correct, but from what I've gathered, you aren't supposed to run the u-joints at greater than 15 degrees normally. So wouldn't the angle of the driveshaft matter?

As I understood it the transfer case output shaft angle and the pinion angle should be the same, with the pinion actually being about 1 degree less so it will rolll up to the same angle under torque. Also that the u-joint angles (which should now be the same at both ends) should not be greater than 15 degrees with respect to the angle of the transfercase output shaft/pinion. Did I misunderstand this?

Regardless, I'm going to just go with the SYE and CV driveshaft setup since that seems to be the more solid solution to the problem.