how hard is it to figure out your pinion angle is off or not?
im agressivly lowered with coilover and I do feel a vibration but have no idea how to see if my driveshaft is off, im currently on stock UCA but will be ordering soon for a adjustable set, but I mean, can a random tech figure out how to adjust them to remove the driveshaft vibration or is there specific measurement to take from somewhere etc..im so freaking confused with how to adjust thèses things..id like to know, thanks

 

You use a magnetic angle finder, like you can buy at Lowes for $8, and use it to measure the drivetrain angles.