Pinion angle question.

Quick question, I finally measured my driveline angles last night and is is what I found. My transmission is 3* down and my differential is 1* down. So in theory, if my pinion rotates up 4* under acceleration, that would put the trans at 3* down and the diff at 3* up and should be right where I want it, correct?

I’ve had a driveline vibration for quite awhile and was thinking it was my pinion angle but when I pulled the driveshaft, I discovered the front u-joint is stiff and “notchy”. So now I’m thinking my pinion angle is fine and it was that joint causing the issues