- Location
- Fargo, ND
Just when I thought I put enough control arm shims in to get my front pinion angle right (after 1.5" coil-spacer lift), I start hearing a vibration at 60+ mph. I pull the front DS off and vibes go away. My pinion was 0.5° below by DS angle.
What makes sense for the Front? Searched and searched (lots of posts for the rear) and here is what I found:
- Front pinion should be just a hair above DS angle. (no reason given)
- Front pinion should be just a hair below DS angle, because the front axle is coasting most of the time (this makes no sense to me).
I agree with the first statement that I found, any one else agree?
- It makes sense that with an increase in speed, the more the front end gets pushed down from aerodynamic drag. Compressing the coils results in lowering the front pinion angle, which makes it worse in my case (or anybodys case).
- It also appears that the front DS is more fussy with vibrations as the Double Cardan angle gets larger.
What makes sense for the Front? Searched and searched (lots of posts for the rear) and here is what I found:
- Front pinion should be just a hair above DS angle. (no reason given)
- Front pinion should be just a hair below DS angle, because the front axle is coasting most of the time (this makes no sense to me).
I agree with the first statement that I found, any one else agree?
- It makes sense that with an increase in speed, the more the front end gets pushed down from aerodynamic drag. Compressing the coils results in lowering the front pinion angle, which makes it worse in my case (or anybodys case).
- It also appears that the front DS is more fussy with vibrations as the Double Cardan angle gets larger.
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