I have been trying to track down an oscillating type driveline vibration for some time now. i had a custom driveshaft made by who i thought was a reputable company. I noticed while setting the pinion angle with my new UMI control arms that the driveshaft caps are not perfectly aligned with each other. Best i can tell with an angle finder they are 4 degrees apart. Is this enough to cause a vibration? Pinion angle is perfect, new trans tailshaft bushing, wheels true and balanced, engine/trans and rear squared perfectly. Any help appreciated!