Quote:
Both of those readings look to be down, so the pinion angle is -6.5*. Usually too much for a street car.
When you get the 2.5* shims, place the fat end towards front of car to roll pinion up and that should get you a -4 pinion angle which is about the max I'd run on a driver car.
Too much pinion down.
I would bet that can/would cause your vibration issue. 
Last edited by Copper Dart; 05/15/14 02:52 PM.
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