Pinion angle and drivetrain vibration

Sounds to me like you need more like 4 If I read that right..... You need the two parallel when under hard power, not when parked. Most recommend something like "2 down" that is the pinion 2 down from the transmission when parked. you are? measuring this with weight on all the wheels, and really, should have a tank of fuel and maybe even a "driver." In other words, "as would be" set to go down the road

You say the transmission shaft points up 1, and (to re-word) the pinion points up 1. To get them parallel means the pinion must go down 2, but that is PARKED. The pinion is going to go up more under power, so you should "start with" adding 2 more I would think