How did you fix your E30 5.0 driveline vibrations?

[Muuurph]

Title says it, I've read forums over and over, I have a 5.0 with t5 in my e30, have always had teeth rattling vibrations 60-80 mph and Pretty bad over 80, it's in the driveshaft ive changed flywheel back to rearend, I've bought a protractor and I believe it's my pinion angle I've tried raising tail shaft with no change, so what's the fix? I've had it balanced twice

[Pootis]

You can download an app to check pinion angle

[JGood]

If you believe it's the pinion angle, and you want us to tell you how to fix it, you'll need to provide us with the angle measurements.

[Muuurph]

Best way to get an accurate differential measurement? I have a digital and old school protractor and neither I could get a good measurement of it

[Pootis]

There should be a flat tab on the underside of your diff right before the flange