Just checkin in to see what are the biggest angles people are able to make work without vibrations. I have 15* now and am having trouble getting rid of vibs. The angles are matched dead-on according to my angle finder. It is smooth under launch and vibrates all the time under cruise, except when coasting. This could mean that the pinion needs to come up a little bit. There is about 5" of lift in the back, with stock driveshaft (208 slip-yoke) and 14Bsf.