I was looking at 4 link suspension's and spotted this in the Ridetech  Pinion Angle instructions that I could of used a few years ago when I had a vibration.   Here's what they say. Road testing will tell you if you have it right.If you accelerate and you get or increase vibration, then the pinion yoke is too HIGH. Rotate it downward in small increments of degree or two until the problem goes away. If you get or increase vibration when decelerating, then the pinion yoke is too LOW. Rotate it upward to correct it.

Last edited by Steve69 (1/08/2019 7:46 PM)