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Pinion angle
When building my '71 Suburban, I changed all body mounts, engine mounts, trans mount, trailing arm and track arm bushings with polyurethane. I added a 700r4 and shortened my two-piece driveshaft by 3". I also changed only the front springs with 2" lowering springs. I am getting a slight vibration at certain speeds and I am thinking it could be the pinion angle is off after changing these things. Any thoughts? Could these mods have affected the pinon and trans angles?
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