So... I continue to struggle with a vibration felt through the car that starts about 65mph, and gets VERY noticeable and irritating by the time you hit 75-80. I went through each tire/wheel with the tech on the RoadForce, so we are in good shape there. Up to 60mph, the car is perfectly smooth.
I have been again focusing on driveline angles, and went out and purchased a digital angle gauge, and have been reading up on the topic.
The attached pic shows my current angles.
I am a little confused however... most would say to run a -2 or so on the pinion, but that would really throw off the working angle. From what I have here, it would appear that I should either move my pinion up to +1.5, or reduce my trans angle a little in order to have a perfect offsetting/cancellation angle.
Am I looking at this right? The challenge is that I am about out of adjustment on my upper control arms, I could maybe go another turn and still be safe. Also, I am about to the limit on my trans height, maybe can go another 1/8" shim.
Anyway, it seems to me that these angles should be within "spec" that would not cause the high speed vibrations I have. A difference of 1 degree on the working angle should be good, right?
Any thoughts from those have been down this road? Frustrating...
